Device for transporting developer, developing device, processing unit and image formation device

FIELD: physics; image processing.

SUBSTANCE: invention relates to a device for transporting developer for use in an image formation device. Proposed is a device for transporting developer having a developer transportation unit and a unit for detecting toner concentration. There is a clamping wall in part of the entire area of the first transportation compartment in which there is a first screw element. The area lies opposite the bottom wall of the first transportation compartment on the bottom side in the direction of gravity of the first screw element and opposite sidewalls of the first transportation compartment on both transverse sides orthogonal to the direction of the axis of rotation of the first screw element. In this area toner concentration of the transported developer is determined using a toner concentration sensor. The clamping wall comes into contact with developer on the top in the direction of gravity, with the developer moving from the bottom to the top side in the direction of gravity in accordance with rotation of the first screw element and presses the developer down in the direction of gravity.

EFFECT: more accurate toner concentration detection.

13 cl, 48 dwg

 

The technical field to which the invention relates.

The invention relates to a device for transporting developer for use in the forming device of the image.

The level of technology

The device transporting the developer used in the device imaging. The transport system transports the developer developer containing toner and magnetic carrier. The device transporting the developer includes an element of mixing and transport, which transports the developer in the axis direction while stirring the developer according to the rotation of the mixing element and transportation. The device transporting the developer also includes a detection unit concentration of the toner, which detects the toner concentration of the developer transported through the element of mixing and transport.

Item mixing and transportation, which, in General, is a helical (screw) element that transports the developer in the area in front of the element holding the latent image according to the moving surface of the element holding the developer, which, in General, is the nut, while holding the developer on the surface of the element holding the developer. Processing device transfers the toner in the developer on the TFR is th picture element holding the latent image, to manifest the latent image to obtain a toner image. The developer, who contributed to the manifestation, is returned in element mixing and transport in the developing device according to the moving element of the retention of the developer. The toner concentration of the developer is detected by the detection unit concentration of toner as the developer is transported through the element of mixing and transport. The developer re-filled with the appropriate amount of toner on the basis of the detection and re-fed into the transport element of the developer.

Sometimes the amount of toner in the developer is changed due to environmental changes or changes in the quantity of electric charge on the toner. In this case, although the concentration of toner has not changed, the traditional unit detecting the concentration of toner erroneously detects changes in the concentration of toner. Such erroneous detection can be prevented through the dense pressure of the developer in the position of detection by the detection unit concentration of the toner in order to adjust the amount of toner used, which affects the concentration of toner. For example, in patent application laid Japan 6-308833 shown (see figure 10) shown in the diagram, that the result of detection by a sensor Prony is emoti as a unit detecting the concentration of toner may be fixed regardless of the amount of charge of toner by pressing the developer by force, equal to or greater than 30 g/cm2(9,8×300 N/cm2).

The invention

According to the present invention, an apparatus for the transportation of the developer containing unit transporting the developer, which transports the developer containing the toner and the carrier in the direction of the axis of rotation during stirring of the developer using the transport element and mixing, and the power detecting the concentration of toner, which detects the concentration of toner in the developer transported in the transport of the developer. Shroud wall is provided on the plot with the total area of the transport direction of the developer in the unit transporting the developer, thus clamping the wall comes in contact, from above in the direction of gravity, with the developer which moves from the lower side to the upper side in the direction of gravity according to the rotation of the mixing element and transporting and pressing the developer down in the direction of gravity. This area is opposite the bottom wall block transport of the developer on the lower side in the direction of the gravity element mixing and transport, and opposite side walls block the transportation of the developer on both transverse sides orthogonal to the direction of the axis of rotation of the mixing element and transportation. To ncentrate toner transported in the developer is detected by the detection unit concentration of the toner in this field.

According to another aspect of the present invention is provided with the device containing the device transporting the developer, which transports the developer containing toner and carrier, and an element holding the developer, which transports the developer transported by the transportation device of the developer in the area in front of the element holding the latent image according to the moving surface of the element holding the developer while holding the developer on a continuously moving surface, and manifests the latent image recorded in the element holding the latent image. The above device is used as a device for the transportation of the developer.

According to another aspect of the present invention provides a processing unit in the device for the formation of images containing the element holding the latent image, a developing device for the manifestation of the latent image on the element holding the latent image and the transfer unit visual image shown on the element holding the image on the transfer element, and the processing unit contains at least an element holding a latent image and a developing device in a holding element as one unit and secures the I with the possibility of removal on the primary device imaging. The specified device is used as a processing device.

According to another aspect of the present invention, an apparatus forming images containing the element holding the latent image that holds the latent image, and a processing unit for the manifestation of the latent image on the block holding the latent image. The above-mentioned developing device is used as a processing device.

Brief description of drawings

The above and other objectives, features, advantages and technical and industrial significance of the invention are explained in the following detailed description of preferred embodiments of the invention with reference to the accompanying drawings, on which:

Figure 1 depicts a schematic view of a copier according to the invention;

2 is a diagram of the internal structure of the printer unit in the copy machine according to the invention;

Figure 3 diagram of the processing units for yellow (Y) and cyan (C) colors according to the invention;

Figure 4 - the layout of the block of optical sensors and an intermediate transfer belt according to the invention;

5 is a block diagram of a copier according to the invention;

6 is a flowchart of the operational sequence of the method of adjustment of the parameters to perform aemula through the control unit, according to the invention;

Fig.7 is a fragmentary top view of the pattern for detection of tones Y-concentration and the intermediate transfer belt according to the invention;

Fig - diagram of the amount of adhering toner from potential according to the invention;

Fig.9 is a diagram of the amount of adhering toner of the reference latent image potential, where the dependence is linear according to the invention;

Figure 10 - example of table contents management capabilities according to the invention;

11 is a General view of parts of the processing device Y figure 3 according to the invention;

Fig - view in plan of the parts processing device for Y figure 11 according to the invention;

Fig - diagram of bulk density from the time of mixing at slow speed in the developer according to the invention;

Fig - diagram representation of the toner particles in the default state, according to the invention;

Phi. 15 is a schematic representation of the toner particles after the developer was standing without stirring for 30 minutes according to the invention;

Fig - diagram between the output signal Vt of the sensor to the concentration of toner (Volts) and the time of stirring at slow speed (minutes) according to the invention;

Fig - diagram of the output signal Vt of the sensor end of the ation of the toner (V) from the concentration of toner (%) according to the invention;

Fig diagram of the device transporting the developer in the developing device for black (K) according to the invention;

Fig diagram of another embodiment of exercise device transporting the developer in the developing device for black (K), in which the wall is placed between the sensor and the concentration of K and K toner-developer in the first conveying compartment according to the invention;

Fig - transverse section of the device transporting the developer for K pig according to the invention;

Fig - side view of the first screw element for K pig according to the invention;

Fig - side view to explain the flow of the K-developer in the first screw element for K pig according to the invention;

Fig - chart dependencies between transformation value of the toner concentration (% weight) of the output signal Vt of the sensor to the concentration of toner (Volts) and the time of stirring at slow speed (minutes) at a time when the K-developer having a concentration of the K-toner 8 (percent weight), stirred at slow speed, according to the invention;

Fig - diagram between the output signal Vt of the sensor to the concentration of toner (Volts) and toner concentration (% weight) according to the invention;

Fig is a diagram of the characteristics of the transformation values of the toner concentration (% weight of the output signals of the sensor (Volts) for angle θ2 on Fig, at 45 degrees, 20 degrees and 0 degrees, according to the invention;

Fig - side view of part of another version of the exercise device transporting the developer in the developing device for black (K), in which only one end side of the blade opposite the transport is connected with a spiral blade (screw), according to the invention;

Fig - side view of part of another version of the exercise device transporting the developer in the developing device for black (K), in which only the other end side of the blade opposite the transport is connected with a spiral blade, according to the invention;

Fig - side view of part of another version of the exercise device transporting the developer in the developing device for black (K), in which two opposing surfaces of the spiral blade are connected by a jumper by blade return shipments, according to the invention;

Fig diagram of the characteristics of the transformation values of the toner concentration (% weight) of the output signals of the sensor (Volts) for three cases: when the blade reverse transportation is not provided, when both ends of the blade return shipments are bridged in a spiral blade, and when both ends of the blade return shipments are not connected with a spiral blade, according to the invention;

p> Fig - side view of another version of the exercise device transporting the developer in the developing device for black (K), in which a flat rectangular blade is provided as a blade return shipments, according to the invention;

Fig - side view of another version of the exercise device transporting the developer in the developing device for black (K), in which twisted the blade is provided as a blade return shipments, according to the invention;

Fig - side view of another version of the exercise device transporting the developer in the developing device for black (K), in which the hollow blade is provided as a blade return shipments, according to the invention;

Fig - cross section of the first screw element, cracked broken blade return shipments, according to the invention;

Fig - diagram of the output signal Vt of the sensor to the concentration of toner (V) and mixing time in slow speed (seconds) during mixing at slow speed, according to the invention;

Fig is a block diagram of the sequence of operations of a method of processing adjustments control the concentration of toner is performed by the control unit of figure 5, according to the invention;

Fig - section vari the NTA implementation of the first mixing compartment, in which the sensor of the concentration of toner is provided in the third quadrant, according to the invention;

Fig - section of another version of the implementation of the first mixing compartment in which the developer is not filled in the gap between the pressure wall and the first screw element according to the invention;

Fig - section of another version of the first mixing compartment, in which the presser wall is not provided in the second quadrant, according to the invention;

Fig - side view of the first example of the first coil element, in the processor device K according to the invention;

Fig - chart dependencies between transformation value of the toner concentration (% weight) of the output signal Vt of the sensor to the concentration of toner (Volts) and the time of stirring at slow speed (minutes) at a time when the K-developer having a concentration of the K-toner 8 (percent weight), stirred at slow speed in the first example according to the invention;

Fig - diagram between the output signal Vt of the sensor to the concentration of toner (Volts) and toner concentration (% weight) in the first example according to the invention;

Fig - side view of the second example of the first screw element in the developing device according to the invention;

Fig - side view of the third example per the CSO of the screw element in the developing device according to the invention;

Fig - side view of part of the fourth example of the first screw element in the developing device according to the invention;

Fig - side view of the first example of the first screw element in the processor device, for K copier according to the second modification of the invention;

Fig - side view of the second example of the first screw element in the developing device according to the invention;

Fig - side view of the third example of the first screw element in the developing device according to the invention;

Fig - side view of part of the fourth example of the first screw element in the developing device according to the invention.

Description of the preferred option of carrying out the invention

It was found experimentally that in the actual application of the permeability sensor is not always detect output characteristics indicated in the diagram figure 10 patent application laid Japan 6-308833. In particular, the device of transporting developer, disclosed in this application, transports the developer in the direction of the axis of rotation according to the rotation of the screw element, as an element of mixing and transportation, located in the transportation of the developer. The unit for determining the concentration of toner attached to the bottom wall of the unit transporting to show what I determines the concentration of toner in the transported developer. The roughened surface is applied to the bottom wall of the block transport of the developer on the output side in the conveying direction of the developer than the position detection of the concentration of the toner by means of the detection unit of the concentration of toner. The transport speed of the toner is reduced by the area of the roughening surface to press the developer in the position detection of the concentration of toner, which on the output side in the conveying direction of the developer than the plot of roughening the surface in the conveying direction of the developer. However, according to the conducted experiments in this developing device pressing force to the developer in the conveying direction of the developer and the result of detection by a sensor of the concentration of toner comprising a sensor permeability, did not show a satisfactory correlation.

Therefore, we carried out additional experiments and it was found that a satisfactory correlation is obtained between the pressing force in the direction of transport of the developer applied to the developer, and the sensor of the concentration of toner for the following reasons. A certain clearance is there between the wall of the transport block is irowiki developer, includes screw element, and a spiral blade of the screw element. The sensor of the concentration of toner attached to the wall of transporting developer, has a relatively short detectable range distances. Thus, the sensor of the concentration of toner cannot detect the toner concentration of the developer in the spiral blade in a relatively remote position. The sensor of the concentration of toner can detect the toner concentration of the developer only in the gap next to the sensor. Therefore, the developer in the clearance must be pressed sufficiently. However, the pressing force in the direction of the axis of rotation (the conveying direction) in accordance with the rotation of the screw element is mainly attached to the developer contained in the spiral blade of the screw element. Even if the developer in spiral blade is sufficiently pressed, the developer in the gap further on the outside than the spiral blade may be pressed sufficiently. As a consequence, a satisfactory correlation is obtained between the pressing force in the direction of transport of the developer applied to the developer, and the result of detection by a sensor of the concentration of toner.

Hereinafter described in detail embodiments of the present invention with reference to the accompanying the drawings.

Copy machine (figure 1) contains the unit 1 of the printer, which forms images on the sheet P to the recording device 200 sheet feeder that feeds a sheet to write in block 1 of the printer, the scanner 300, which scans the original image, and the automatic document feeder 400 documents-originals (hereafter ADF), which automatically feeds the original document in the scanner 300.

In the scanner 300 according to the reciprocating motion of the first movable element 303 that is installed with a light source for illumination of the original, mirror, etc. and the second movable element 304 that is installed with many reflecting mirrors, scans of the original (not shown)placed on the contact glass 301. The light scanning emitted from the second movable element 304, is condensed by the focusing lens 305 on the focusing surface of the sensor 306 of the read set for the focusing lens 305. Light scanning is then read as the image signal by a sensor 306 are read.

On the side of the unit 1 of the printer tray 2 manual feed, on which is placed manually sheet P to records filed in the case, and the discharge tray 3 sheets, on which the bundle of sheets P to the recording after the formation of the image uploaded from the case.

Figure 2 shows the schema frequent the internal structure of the unit 1 of the printer. In block 50 of the continuous transfer of the intermediate transfer belt 51 as a transfer element is stretched through a set of pulleys and is housed in the housing unit 1 of the printer. The intermediate transfer belt 51 is made of a material formed by dispersion of carbon powder for adjusting the electrical resistance of less stretchable polyimide resin. The intermediate transfer belt 51 is continuously rotated (clockwise in the drawing) in accordance with the rotation of the leading roller 52, which is driven to rotate clockwise in the drawing through a leading block (not shown), when the tension by leading roller 52, the pressure roller 53 of the secondary transfer driving roller 54 and the four rollers 55Y, 55C, 55M, and 55K primary transfer. The indices Y, C, M and Y, attached to the end of the legend of the roller primary transfer point to the fact that the rollers of the primary transfer are elements for yellow, cyan, Magenta and black. Similarly for indexes Y, C, M and Y, attached to the end of the notation, in the following explanation.

The intermediate transfer belt 51 is stretched in position reverse triangular shape, with its bottom side facing upward in the vertical direction, since the intermediate transport the percentage ribbon 51 strongly curved on the sites where the intermediate transfer belt 51 is superimposed on the driving roller 52, a pressure roller 53 of the secondary transfer and the drive roller 54. The upper surface of the tape, is equivalent to the lower side of the reverse triangular form, is in the horizontal direction. Above the upper surface of the stretch tape four units 10Y, 10C, 10M and 10K treatment placed side by side in the horizontal direction along the direction of passage of the upper surface of the stretch.

Optical recording unit 60 is placed over the four units 10Y, 10C, 10M and 10K processing. Optical recording unit 60 leads, based on information of the original image scanned by the scanner 300, four semiconductor lasers (not shown) by means of the control unit lasers (not shown) and emits four recording light beam L. the Optical recording unit 60 scans the photosensitive elements 11Y, 11C, 11M, and 11K drum forms as elements of the latent image holding units 10Y, 10C, 10M and 10K processing by using the recording light beams L, respectively, in the dark, and writes the electrostatic latent images for Y, C, M and K on the surfaces of the photosensitive elements 11Y, 11C, 11M, and 11K.

Optical recording unit 60 is an optical recording unit that performs optical scanning of p is by means of reflection of the laser beam, emitted from a semiconductor laser, a reflecting mirror (not shown) or passing the laser beam through the optical lens when the deviation of the laser beam by a polygon mirror (not shown). Instead of the specified optical recording block can be used in optical recording block matrix LED.

Figure 3 presents the scheme of the units 10Y and 10C processing and the intermediate transfer belt 51. Unit 10Y processing includes, around the photosensitive element 11Y drum forms the charging element 12Y, the device 13Y removal charge device 14Y cleaning drum, developing device 20Y and the sensor 49Y Y-potential. Unit 10Y processing and the devices attached with the possibility of removal to the printer unit as one unit, this device contained in the casing as a common holding element.

The charging element 12Y is religiously element supported for rotation by bearings (not shown) when coming into contact with the photosensitive element 11Y. The charging element 12Y rotates in contact with the photosensitive element 11Y in the application of the charging bias voltage by a power supply bias voltage (not shown)to uniformly charge the surface of the photosensitive element 11Y, for example, a polarity similar to the polarity the tee charging the Y toner. Charger with scorotron (for charging electrophotographic material) and the like, which performs the processing of uniform charging to the photosensitive element 11Y in a contactless manner, can be adapted instead of the charging element 12Y.

Developing device 20Y includes a housing 21Y, the device 22Y transportation of the developer and the developing unit 23Y. The casing 21Y is populated with Y-developer. The Y-developer is a mixture of magnetic carrier and nonmagnetic Y-toner. In the developing unit 23Y developing sleeve 24Y as the device transporting the developer, which is driven to rotate through a leading block (not shown) for continuous moving surface, opens portion of its external surface outward from the hole provided in the casing 21Y. This formed the manifestations in which the photosensitive element 11 and the developing sleeve 24Y are opposite each other at a predetermined interval.

In the inner part of the developing sleeve 24Y, made of a nonmagnetic element in the form of a hollow tube, a magnetic roller (not shown)that includes multiple magnetic poles arranged in the peripheral direction, is fixed so as not to rotate according to the developing sleeve 24Y. Developing sleeve 24Y is driven to rotate, PR is the involvement of the Y developer in the device 22 transportation of the developer, described later, to the surface using the magnetic field generated by the magnetic roller. Thus, the developing sleeve 24Y retrieves the Y-developer of the device 22Y transportation of the developer. Y-the developer transported in the region of manifestation according to the rotation of the developing sleeve 24Y, included in the doctor gap of 0.9 mm, is formed between the doctor blade 25Y, the tip of which is opposed to the surface of the developing sleeve 24Y for a predetermined period, and the surface of the sleeve. The thickness of the layer on the sleeve is adjusted to be equal to or less than 0.9 mm When the Y-developer is transported next to the developing region opposite the photosensitive element 11Y, according to the rotation of the developing sleeve 24Y, Y-developer is subjected to the action of the magnetic force with the magnetic poles (not shown) of the magnetic roller and becomes like the ears of rice on the sleeve with the formation of the magnetic brush.

For example, the developing bias voltage having the same polarity as the charging polarity of toner is applied to the developing sleeve 24Y through block feed bias voltage (not shown). Therefore, in the field of manifestation between the surface of the developing sleeve 24Y and plot no image (uniformly charged plot, i.e. a plot of the background) of the photosensitive element 11Y dei is there is a potential lack of symptoms for electrostatic move the Y-toner side plot no image on the side of the sleeve. Between the surface of the developing sleeve 24Y and the electrostatic latent image on the photosensitive element 11Y is valid potential manifestations for electrostatic move the Y toner from the sleeve to the electrostatic latent image. When the Y toner in the Y-developer is transferred to the electrostatic latent image under the action of the potential manifestations of an electrostatic latent image on the photosensitive element 11Y is manifested through the Y toner.

Y-the developer which has passed the area of manifestation according to the rotation of the developing sleeve 24Y, is exposed to a magnetic field repulsion generated by the magnetic poles included in the magnetic roller (not shown), and is removed from the developing sleeve 24Y to return inside the device 22 transportation of the developer.

The device 22Y transportation of the developer contains the first screw element 26Y, the second screw element 32Y, a partition placed between the first and second coil element, and the sensor 45Y detection toner comprising a permeability sensor. The partition separates the first transport compartment as a unit of transportation, which contains a first screw element 26Y, and the second transport compartment as a unit of transportation, which contains the Torah screw element 32Y. In areas across both ends of both spiral elements 26Y and 32Y along the axis of both the transport compartment communicated with each other through openings (not shown), respectively.

The first screw element 26Y and the second screw element 32Y as elements of mixing and transport are rod-like elements in the form of a rotating shaft, both ends of which are supported rotatably by bearings (not shown), respectively, and protruding spiral blade provided on the outer surfaces of elements in the form of a rotating shaft. When the first screw element 26Y and the second screw element 32Y are activated to rotate through a leading block (not shown), the first screw element 26Y and the second screw element 32Y transported the Y developer in the direction of the axis of rotation by means of the spiral blades.

In the first transport compartment, which contains the first screw element 26Y, during the rotation of the first screw element 26Y Y-developer is transported from the front side toward the inner side in the direction orthogonal to the surface of the drawing. When the Y-developer is transported near the end on the inner side of the casing 21Y, Y-developer is fed to the second transport compartment through the opening provided in the partition wall (not shown).

PR is safe unit 23Y formed above the second conveyor compartment, contains the second screw element 32Y. The second transport compartment and a developing unit 23Y communicated with each other across the field plots at loggerheads with each other. The second screw element 32Y and the developing sleeve 24Y, placed obliquely above the second screw element 32Y, are located opposite each other while maintaining a parallel relationship. In the second transport compartment of the Y-developer is transported from the inner side to the front side in the direction orthogonal to the surface of the drawing. In the process of transportation of the Y-developer around the direction of rotation of the second screw element 32Y is removed in the developing sleeve 24Y accordingly, and Y is the developer after development is collected from the developing sleeve 24Y accordingly. The Y-developer transported to the end on the front side in the drawing of the second conveyor compartment, is returned into the first transport compartment through a hole (not shown)provided in the partition.

The sensor 45Y concentration of toner as a unit for determining the concentration of toner comprising a permeability sensor, is attached to the bottom wall of the first transport compartment. The sensor 45Y concentration of toner defines the bottom of the first screw element 26Y concentration of the toner of the Y-developer, transport is together through the first coil element 26Y and displays voltage, corresponding to the result of detection. The control unit (not shown) causes the feeder Y-toner based on the value of the output voltage from the sensor 45Y concentration of toner in order to apply the appropriate amount of the Y toner in the first transport compartment. As a result, the toner concentration of the Y-developer reduced when the expression is restored.

The image Y-toner formed on the photosensitive element 11Y, primarily transferred onto the intermediate conveyor belt 51 in the area of the pressure of the primary transfer Y described below. Residual toner transfer, not primarily transferred on the intermediate transport belt 51, adheres to the surface of the photosensitive element 11Y, which has passed through the primary transfer.

The device 14Y cleaning of drums supported cantilever blade 15Y cleaning, e.g. made from urethane rubber, and sets its free end in contact with the surface of the photosensitive element 11Y. The device 14Y cleaning of drums moves towards the tip of the brush of the brush roller 16Y, which includes elements in the form of a rotary shaft driven to rotate through a leading block (not shown), and multiple conductive rises vertically provided on the outer surfaces of elements in f is RME rotary shaft, in contact with the photosensitive element 11Y. The device 14Y cleaning of drums scrapes residual toner from the surface of the photosensitive element 11Y using blade 15Y cleaning and the brush roller 16Y. The cleaning bias voltage is applied to the brush roller 16Y through roller 17Y from metal with an electric field, which is in contact with the brush roller 16Y. The tip of the scraper 18Y pressed against the roller 17Y with the electric field. Residual toner transfer, descrepency with the photosensitive element 11Y through blade 15Y cleaning and the brush roller 16Y, passes through the brush roller 16Y and roller 17Y with electric field 17Y and then describeda with roller 17Y through the scraper 18Y to fall on the collecting screw 19Y. Residual toner transfer out of the housing according to rotation of the collecting screw 18Y and returns to the device 22 transportation of the developer by unit shipment (not shown) for reuse of toner.

The surface of the photosensitive element 11Y, with which the residual toner transfer is cleared through the device 14Y cleaning of drums, is subjected to removal of charge through the device 13Y removal of charge, which includes the lamp remove the charge, and then uniformly charged by the charging element 12Y.

The potential of the site without the image the response of the photosensitive element 11Y, held the position of the optical recording by the recording light beam L, is determined by a sensor 49Y Y-potential, and the result is fed to the control unit (not shown).

The photosensitive element 11Y having a diameter of 60 mm, is provided so as to rotate at a linear speed of 282 mm/s Developing sleeve 24Y, having a diameter of 25 mm, is provided so as to rotate at a linear speed of 564 mm/sec. the Amount of toner in the developer supplied to the region of manifestation, is in the range of from about -10 to -30 µc/year Gap manifestations, which is the gap between the photosensitive element 11Y and the developing sleeve 24Y, is set in the range from 0.5 mm to 0.3 mm, the thickness of the photosensitive layer of the photosensitive element 11Y is equal to 30 μm. The diameter of the electron beam spot on the photosensitive element 11Y recording light beam L is equal to 50×60 μm. The light energy of the recording light beam L is equal to about of 0.47 mW. Uniformly charged potential of the photosensitive element 11Y is equal to, for example, -700 V, and the potential of the electrostatic latent image is equal to -120 C. moreover, the voltage developing bias voltage is, for example, -470, and provides the potential manifestations of 350 C.

Unit 10Y processing is described in detail above. The processing units of other colors (10C, 10M, and 10K) are such W is, as the unit 10Y processing, except that the colors of toner in them differ.

As shown in figure 2, the photosensitive elements 11Y, 11C, 11M, and 11K units 10Y, 10C, 10M and 10K processing rotate while coming into contact with the top surface stretching the intermediate transfer belt 51, is continuously moved in a clockwise direction, and form clamps the primary transfer for Y, C, M and K. On the back of the clamps of the primary transfer for Y, C, M, and K the rollers 55Y, 55C, 55M, and 55K primary transfer are in contact with the rear surface of the intermediate transfer belt 51. Bias voltage for the primary transfer, having a polarity opposite to the charging polarity of toner is applied to the rollers 55Y, 55C, 55M, and 55K primary transfer through blocks supply bias voltage (not shown). The primary transfer for electrostatic transfer of toner from the photosensitive element on the side of the tape are formed in the clamps of the primary transfer for Y, C, M, and K through a voltage bias to the primary transfer. Image Y-, C-, M - and K-toner formed on the photosensitive elements 11Y, 11C, 11M, and 11K, enter the clamps of the primary transfer for Y, C, M, and K according to the rotation of the photosensitive elements 11Y, 11C, 11M, and 11K. Image Y-, C-, M - and K-toner is sequentially superimposed on one another and the primary PE is Rosada on the intermediate transport belt 51 through the fields of the primary transfer and pressure. Therefore, four-color overlapped toner image (hereinafter, "four-color toner image) formed on the front surface (surface of the outer circular contour) of the intermediate transfer belt 51. The conductive brush, which applies bias voltage to the primary transfer, contactless charger scorotron, etc. may be used instead of rollers 55Y, 55C, 55M, and 55K primary transfer.

In the right side of figure 2 block 10K processing unit 61 of the optical sensor is placed so that is opposite the front surface of the intermediate transfer belt 51 while maintaining a predetermined gap. Block 61 of the optical sensors includes (4) sensor 62R positions of the rear side, the sensor 63Y concentration Y of the image sensor 63C concentration C image sensor 62c Central position, the sensor 63M concentration M image sensor 63K concentrations of K-image and sensor 62F position of the front side, placed in the direction of the width of the intermediate transfer belt 51. All these sensors include reflective photosensors. The sensors reflect light emitted from the light emitting element (not shown)on the front surface of the intermediate transfer belt 51 and the toner image on the tape and find the amount of reflected light using the light-receiving element (not shown). The control unit can detect the toner image on the intermediate transport belt 51 and to detect the concentration of the image (the amount of adhered toner per unit area) based on the values of the output voltage of the sensors.

As shown in figure 2, the roller 56 of the secondary transfer placed under the intermediate transfer belt 51. The roller 56 of the secondary transfer comes in contact with the front surface of the intermediate transfer belt 51 and forms a nip of the secondary transfer when activated so as to rotate counterclockwise in the drawing through a leading block. On the rear side of the clamp secondary transfer, the intermediate transfer belt 51 is wrapped around the pressure roller 53 of the secondary transfer, which is electrically grounded.

The bias voltage of the secondary transfer having a polarity opposite to the charging polarity of toner is applied to the roller 56 and the secondary transfer through unit supply bias voltage (not shown)to form a secondary transfer between the roller 56 and the secondary transfer and grounded pressure roller 53 of the secondary transfer. Four-color toner image formed on the front surface of the intermediate transfer belt 51 comes into the zone down the secondary transfer according to the continuous movement between the exact transport tape 51.

Figure 1 also shows the device 200 sheet feeder, a lot of cassettes 201 sheet feeder, which store sheets P for the record, many of rollers 202 sheet feeder, which delivers the sheets P to the records stored in the cassettes 201 sheet feeder, beyond cassettes, many pairs of rollers 203 of division that separate the delivered sheets P to record alone, many couples 205 conveying rollers that convey the sheet P to the recording after the separation along the path 204 of delivery, etc. the Device 200 sheet feeder is placed directly under the unit 1 of the printer as shown in the drawing. Path 204 of the delivery device 200 sheet feeder is connected with the path 70 of the sheet feeder unit 1 of the printer. As a result, the sheets P to record delivered from the cassette 201 of the sheet feeding device 200 sheet feeder, served on the path 70 of the sheet feeding unit 1 to the printer via path 204 of delivery.

Pair 71 of the registration rollers is placed near the end of the path 70 of the sheet feeder unit 1 of the printer. Pair 71 of the registration rollers delivers the sheet P to the recording. pressed between the rollers in the nip of the secondary transfer at the time when the sheet P to the recording synchronized with the four-color toner image on the intermediate transport belt 51. In the area of the nip of the secondary transfer four-color toner image on the intermediate transport belt 51 toric is about is transferred to the sheet P to record together under the action field of the secondary transfer and pressure. Four-color toner image forms a full color image together with white color on the sheet P to the recording. The sheet P for the record, which formed full-color image is discharged from the zone of the secondary clamp and is separated from the intermediate transfer belt 51.

On the left side in the drawing is a block 75 a conveyor belt which continuously moves the continuous conveyor belt 76 sheets counterclockwise in the drawing, when the stretching of the continuous conveyor belt 76 sheets with multiple pulleys. The sheet P for the record, separated from the intermediate transfer belt 51, is supplied to the top surface of the stretching of the continuous conveyor belt 76 of the leaves and is transported to the fixing device 80.

The sheet P to the recording sent to the fixing device 80, is pressed by means of the fixing clamp formed by the heat roller 81 containing the source of heat (not shown)such as a halogen lamp and a pressure roller 82, which is pressed against the heat roller 81. The sheet P to the recording is heated while being pressed, and goes out of the fixing device 80, having a full-color image is fixed on its surface.

A small amount of residual toner of secondary transferring, which is not transferred is and the sheet P to the recording, sticks to the surface of the intermediate transfer belt 51 after passing through the zone of pressure of the secondary transfer. The residual toner on the secondary transfer is removed from the intermediate transfer belt 51 by the device 57 cleaning tape which is in contact with the front surface of the intermediate transfer belt 51.

Cross-device 85 (Fig 1) is located under the fixing device 80. When the sheet P to the recording discharged from the fixing device 80, arrives at the position of the switching path of transportation to toggle through the rocking change-over pawl 86, the sheet P to the recording is sent to a pair of rollers 87 unloading sheets of cross-device 85 according to the position of the termination swing switching pawl 86. When the sheet P to the recording sent to a pair of rollers 87 unloading of sheets, after discharge from the device, the sheet P to the recording is folded stack in the tray 3 unloading sheets.

On the other hand, when the sheet P to the recording is sent in a cross-device 85 after treatment by the cross-transport through cross-device 85, the sheet P to the recording transported in a pair 71 of the registration rollers again. The sheet P to the recording again arrives in the zone of pressure of the secondary transfer, and a full color image is formed on the other surface.

Lys is P for the record, supplied in tray 2 manual feed provided on the side of the unit 1 of the printer is fed into a pair 71 of the registration rollers after passing through the roller 72 manual feed 73 and a pair of separation rollers feed manually. Pair 71 of the registration rollers can be grounded or it may be applied bias voltage, to remove paper powder from the sheet P to the recording.

When the user removes the copy of the original by using the copy machine, he first places the original on the counter 401 for the originals in the automatic document feeder 400 documents-originals. Alternative user opens the automatic document feeder 400 documents-original, place the original on the contact glass 301 of the scanner 300 and closes the automatic document feeder 400 documents-originals to press the original. Then, when the user presses a start button (not shown)when the original is placed on the automatic document feeder 400 documents-originals, the original is fed onto the contact glass 301. The scanner 300 is driven to scan through the first movable element 303 and the second movable element 304. Almost at the same time starts the conversion unit 50 transfer and units 10Y, 10C, 10M and 10K processing of the respective colors. Delivery of the sheet P to the recording from the device 200 sheet feeder also launched the tsya. When the sheet P to the recording, not placed in the cassette 201 of the sheet feeder is used, the delivery of the sheet P for the record, is placed in the tray 2 manual feed is performed.

Figure 5 presents a block diagram of a copier. Copy machine contains block 500 that controls the various devices. In block 500 management persistent storage device (ROM) 503, which previously stores fixed data such as a computer program, and a random access memory (RAM) 502, which acts as a workspace, etc. to save rewritable various data are connected through a bus line with a Central processing unit (CPU) 501, which performs management of various arithmetic operations and bringing the corresponding blocks. ROM 503 also stores a table of data conversion concentrations, indicating the dependence between the values of the output image from the image sensors of the respective colors (63Y, 63C, 63M, and 63K figure 4) in block 61 of the optical sensors and the density of the image corresponding to the values of the output voltage.

Unit 1 of the printer device 200 sheet feeder, scanner ADF 300 and 400 are connected with the control unit 500. For convenience of illustration only a few sensors and optical recording unit 60 is shown as the device is ist in unit 1 of the printer. In other words, the control unit 500 controls other devices (for example, the transfer unit and the processing units of different colors), which are not shown in figure 5. The signals output from the sensors are sent to the control unit 500.

Figure 6 shows the block diagram of the sequence of processing operations adjustments to the settings performed by the control unit 500. Processing of the correction parameters is performed in a predetermined time, for example, during the start of the copying apparatus, each time the number of copies specified in advance, removed (between the preceding printing operation and the current print operations when performing continuous printing) or every fixed time. Figure 6 shows the flow of processing during start-up of the copier.

When the processing of the correction parameters is started, first, in order to distinguish between the turn-on time of the power source from the time of the incorrect processing of the jam and the like, the surface temperature of the heat roller (hereinafter "temperature fixation") in the fixing device 80 is detected as a condition for execution of the flow. Is determined whether the temperature of the fixing 100°C. When the temperature of the fixing exceeds 100°C (NO at step S1), the control unit 500 considers that it does not turn on the power source, and for erset flow.

When the temperature of the fixing does not exceed 100°C (YES at step S1), the control unit 500 performs checks on potential sensor (step S2). For this scan gauge potentials, the control unit 500 uniformly charges, in the processing units of the respective colors 10Y-10K, the surface of photosensitive elements 11Y-11K when the pre-defined condition, and detects the surface potentials of the photosensitive elements 11Y-11K with gauge potentials (for example, 49Y figure 3). Then, the control unit 500 performs the adjustment of the Vsg or optical sensors (61 figure 4) (step S3). When the Vsg adjustment unit 500 controls adjusts to the respective sensors 62R, 62C, 62F, 63Y, 63C, 63M, and 63K, the amount of light emission of the light emitting element to capture output voltage (Vsg) from the light-receiving element that detects the reflected light in the area without images, the intermediate transfer belt 51. At steps S2-S3 unit 500 controls in parallel checks of potential sensors and the Vsg adjustment for the corresponding colors.

When the Vsg adjustment is completed, the control unit 500 determines whether the error when checking the gauge potentials (step S2) and the Vsg adjustment (steps S3 and S4). When there is an error (NO in S4), after setting the error code corresponding to the error (step S18), the control unit 500 head of RSET work. On the other hand, when no error occurs (YES at S4), the control unit 500 determines if the automatic system correction parameters (step S5). The control unit 500 carries out the processing at steps S3-S4 regardless of the adjustment of the parameters.

When the system adjustment settings are not set automatically (settings assigned a fixed value) (NO in S5), after setting the error code to the control unit 500 completes the sequence control flows. On the other hand, when the system adjustment parameters are set automatically (YES at S5), the control unit 500 causes the execution flow to the steps S6-S16 described below.

At step S6, the control unit 500 generates seven sets of fragmented toner template that includes a set of reference toner images, shown in figure 4, on the front surface of the intermediate transfer belt 51. These fragmented toner patterns are formed next in the direction of the width of the intermediate transfer belt 51 so as to be detected by any of the seven sensors 62R, 62C, 62F, 63Y, 63C, 63M, and 63K included in block 61 of the optical sensors. These seven sets of fragmented toner patterns roughly divided into fragmented patterns to locate shades of concentration and fragmentation patterns for detecting positional QCD is onine.

As fragmented patterns to locate shades concentration fragmentary templates PpY, PpC, PpM and PpK to detect shades of concentration Y, C, M, and K, which includes a set of reference toner images of the same color (the reference toner images of Y, C, M or K)having different image densities separately formed and detected by means of sensors 63Y, 63C, 63M, and 63K concentration Y-, C-, M - and K-image. Referring to the fragmentary pattern PpY to detect shades of concentration Y in the example shown in Fig.7, the fragmented pattern PpY includes n reference toner images of Y, i.e. the first reference toner image Y PpY1, the second reference toner image Y PpY2, ..., and the nth reference toner image PpYn placed with a pre-defined intervals of G in the direction of movement of the tape (the arrow direction in the drawing). These reference toner images have different image densities, but have the same shape and position on the intermediate transport belt 51. The reference toner images are rectangular, and the width direction is set along the width direction of the tape and the direction of the length defined along the direction of movement of the tape. Their width W1 is 15 mm and the length L1 is 20 mm, the Interval G is 10 mm Spacing direction W is Rina tape in fragmented patterns of different colors is 5 mm.

The respective reference toner images in these fragmentary templates PpY, PpC, PpM and PpK to detect shades of concentration is a toner image formed on the photosensitive elements 11Y, 11C, 11M, and 11K of the respective units 10Y, 10C, 10M and 10K processed and transferred on the intermediate transport belt 51. When the reference toner images are directly under the sensor 63Y, 63C, 63M, and 63K concentration of toner according to the continuous movement of the intermediate transfer belt 51, the reference toner image to reflect light emitted from sensors on its surface. The amount of reflected light takes on the values correlated with the density of the reference toner image. The control unit 500 stores, for each of the colors, the values of the output voltage of the sensors for the respective reference toner images in the RAM 502 as Vpi (i=1 to N) (step S8). After setting the density of the image (the amount of adhered toner per unit area) of the respective reference toner images based on the values of the output voltage of the sensors and data table conversion concentrations in the ROM 503 in advance, the control unit 500 stores the results in RAM 502 (step S9). Before fragmentary patterns to locate shades concentration for the respective color Deposit on the photosensitive elements are appropriate to ejstvujuschij colors, the potentials of the respective reference latent image as precursors of the reference toner image detected by the sensor potential. The control unit 500 sequentially stores the detection result in the RAM 502 (step S7).

When the amount of adhering toner for the toner images of the respective colors is specified, the control unit 500 computes the corresponding potentials manifestations for developing devices of the respective colors (step S10). In particular, for example, the relationship between the potential corresponding to the reference latent images obtained in S7, and the amount of adhering toner obtained in S9, is drawn in the X-Y plane, as shown in Fig. In the drawing, the X-axis indicates the potential difference between the developing bias voltage VB and the potential of the latent image), and the Y-axis indicates the amount of adhered toner per unit area (mg/cm2). As described above, the reflective photosensors are used as the respective sensor unit 61 of the optical sensors. The value of the output voltage of the sensors are saturated when the amount of adhered toner on the reference toner image is big enough. Therefore, when the amount of adhering toner is calculated using the value of the output voltage of the sensor to the reference toner image having a relatively greater number of adhered toner, the error occurs. Thus, as shown in figure 9, only the combination of data in the plot, where the relationship between the reference potential of the latent image and the amount of adhering toner is linear, selected from a variety of combinations of data that includes the reference potentials of the latent image and the amount of adhering toner to the reference toner images. Linear approximation of the characteristics of display is obtained by applying the method of least squares to the data in this plot. Potential manifestations of each color is calculated on the basis of the approximate linear equation (E)obtained for each of the colors. Although reflective type photosensors correct reflection used in this copy machine can be used reflective photosensors type diffuse reflection.

The following equations are used in the calculation by the least squares method:

Xave=ΣXn/k (1)

Yave=ΣYn/k (2)

Sx=Σ(Xn-Xave)×(Xn-Xave) (3)

Sy=Σ(Yn-Yave)×(Yn-Yave) (4)

Sxy=Σ(Xn-Xave)×(Yn-Yave) (5)

When the approximate linear equation (E), obtained from the output values of the sensors potentials of the respective colors (the reference potentials of the latent images of the respective colors), and the amounts of adhered toner (image densities) for the respective reference toner image is raised, equal to Y=A1×X+B1, the coefficients A1 and B1 can be represented as follows:

A1=Sxy/Sx (6)

B1=Yave-A1×Xave (7)

The correlation coefficient R of the approximate linear equation (E) can be represented as follows:

R×R=(Sy×Sxy)/(Sx×Sy) (8)

From the data Xn capacity and data Yn amount of adhering toner after visualization obtained from the potentials of the reference latent image and the amounts of adhering toner of each color, which are calculated to S9, the following six data sets with the lowest numeric value selected:

(X1-X5, Y1-Y5)

(X2-X6, Y2-Y6)

(X3-X7, Y3-Y7)

(X4-X8, Y4-Y8)

(X5-X9, Y5-Y9)

(X6-X10, Y6-Y10)

Calculating a linear approximation is performed according to the equations (1)-(8), and the correlation coefficient R is calculated in order to obtain the corresponding six sets of approximate linear equations and correlation coefficients(9)-(14):

Y11=A11×X+B11; R11 (9)

Y12=A12×X+B12; R12 (10)

Y13=A13×X+B13; R13 (11)

Y14=A14×X+B14; R14 (12)

Y15=A15×X+B15; R15 (13)

Y16=A16×X+B16; R16 (14)

Another approximate linear equation corresponding to the maximum value of the coefficients R11-R16 correlation is selected as the approximate linear equation (E) obtained from six of approximate linear equations.

In approximate linear equation (E) the value of X at the time when the value Y is the desired maximum volume Max prelapse what about the toner, as shown in Fig.9, i.e. value Vmax of the potential manifestations, is calculated. The potential VB developing bias voltage in each of the developing devices of the respective colors and the corresponding potential of the latent image potential of the unit of exposure) VL corresponding to the potential VB developer bias voltage, are defined by the following equations (15) and (16) from equations described above:

Vmax=(Mmax-B1)/A1 (15)

VB-VL=Vmax=(Mmax-B1)/A1 (16)

The relationship between VB and VL can be represented using the coefficients of the approximate linear equation (E). Therefore, equation (16) is represented as follows:

Mmax=A1×Vmax+B1 (17)

The relationship between the background potential VD, which is the potential to expose the photosensitive elements, and the potential VB developing bias voltage is set of X-coordinates of VK (voltage start manifestations processor device) at the point of intersection of the linear equation shown in Fig.9, ie,

Y=A2*X+B2 (18)

and the X-axis and the background blurred limit voltage Vα, which is obtained experimentally:

VD-VB=VK+Vα(19)

Thus, the relationship between Vmax, VD, VB, and VL depends on equations (16) and (19). In this example, with Vmax as the reference value dependence between the reference value and the corresponding voltages VD, VB, and VL is obtained through the ohms of the experiment, etc. in advance and stored in the ROM 503 in the quality table management potentials, shown in figure 10.

The control unit 500 selects Vmax nearest to Vmax, calculated for each of the colors of the table control potentials, and sets the appropriate control voltage (potential) VB, VD and VL corresponding to the selected Vmax, as the target potentials (step S11).

Then, the control unit 500 controls the laser power of the semiconductor laser of the optical recording unit 60 so as to be the maximum power of the light, through circuit 510 controls the recording and captures the output value of the sensor potentials to thereby detect the residual potential on the photosensitive elements (step S12). When the residual potential is not equal to 0, the control unit 500 adjusts the target potentials VB, VD and VL, as identified in step S11, the value of the residual potential to set the target potentials.

The control unit 500 determines whether there is an error in the steps S5-S13 (step S14). When there is an error even in the same color (NO at S14), the control unit 500 sets the error code, because the deviation of the concentration of the image is significant, and the processing after that is useless, even if only other color managed (step S18), and ends the sequence control flows. Block 500 upravleniya updates the conditions for the creation of images and creates a image under the terms of imaging, the same as for the last time, until the next processing adjustments to the settings will not be successful.

When S14 it is determined that no error (Y), the control unit 500 controls the power supply (not shown) so that the background potential VD of the photosensitive elements of the respective colors has reached the target potential. The control unit 500 adjusts the power of the laser light in semiconductor lasers by means of the control unit lasers (not shown) so that the surface potential VL of the photosensitive elements has reached the target potential. The control unit 500 controls the power supply so that the potential VB developer bias voltage reaches the target potential in the developing devices of the respective colors (step S15).

The control unit 500 determines whether there is an error on S15 (step S16). When there is no error (YES at S16), after executing the processing of correcting the positional deviation, which is described later, the control unit 500 completes the sequence control processing. On the other hand, when there is an error (NO in S16), the control unit 500 completes the sequence control flows after setting the error code.

As fragmented templates for the detection of positional deviation, as shown in figure 4, three sets of frag is InterNIC templates i.e. fragmented patterns for positional deviation PcR rear side, is formed near one end in the width direction of the intermediate transfer belt 51, fragmented patterns to locate the Central positional deviation PcC formed in the center in the width direction, and fragmented patterns for detecting a positional deviation of the front side PcF formed near the other end in the width direction, are formed. All fragmentary templates include a set of reference toner images in the direction of movement of the tape. Each of the three sets of fragmentary patterns has a reference toner images of four colors Y, C, M and K. If the positional deviation does not occur in a photosensitive elements, the optical system of the exposure in each of the reference toner images back, center and front sides of the respective colors are formed with equal intervals and in equal positions. However, when there is a positional deviation, the intervals of the formation varies, and the position of the bend. Therefore, in the processing of correction of positional deviation (step S17), the control unit 500 detects irregular intervals and conditions of formation based on the time intervals of the detection sootvetstvuyushchikh toner images. The control unit 500 adjusts based on the result of detection of the tilt mirrors of the optical system of the exposure by using a not shown mechanism for adjusting tilt and corrects the start time of the exposure. As a result, the positional deviation of the toner images of the respective colors is reduced.

Figure 11 shows a General view of the parts of the developing devices 20Y for Y. Fig is a view in plan of the parts of the developing devices 20Y when viewed from above. As described above, the developing device 20Y includes a developing unit 23Y, including developing sleeve 24Y and the device 22Y transportation of the developer, which agitates and conveys the Y developer. The device 22Y transportation of the developer includes a first conveyor compartment, which contains the first screw element 26Y as part of the mixing and transport and the second transport compartment that contains the second screw element 32Y as part of the mixing and transport. The first screw element 26Y includes an element 27Y in the form of a rotating shaft, both of which end in the axis direction is supported rotatably through bearings, and a spiral blade 28Y provided in the form of bulges in spiral form on the outer surface of the element 27Y rotating valastro screw element 32Y includes an element 33Y in the form of a rotating shaft, both of which end in the axis direction is supported rotatably through bearings, and a spiral blade 34Y provided in the form of bulges in spiral form on the outer surface of the element 33Y in the form of a rotating shaft.

The first screw element 26Y in the first transport section as block transport of the developer is surrounded by walls of the housing around its sides. Two parties on both sides in the axial direction of the first screw element 26Y, plate 21Y-1 rear and plate 21Y-2 front side of the enclosure surrounding the first coil element 26Y from both sides in the axial direction. On one of the two parties on both sides in the axial direction orthogonal to the axial direction of the first screw element 26Y, plate 21Y-3 left side of body as the side wall is in the direction of the axis of rotation of the first screw element 26Y, while opposing the first coil element 26Y through a predetermined amount. On the other two sides of the partition 21Y-5 as a side wall which separates the first transport compartment and the second transport compartment, goes in the direction of the axis of rotation of the first screw element 26Y, while opposing the first coil element 26Y through a pre-defined p is omegatek.

The second screw element 32Y in the second transport section as block transport of the developer is surrounded by walls of the housing around its sides. Two parties on both sides in the axial direction of the second screw element 32Y, plate 21Y-1 rear and plate 21Y-2 front side of the enclosure is surrounded by a second screw element 32Y from both sides in the axial direction. On one of the two parties on both sides in the axial direction orthogonal to the axial direction of the second screw element 32Y, plate 21Y-4 right side of the housing as the side wall is in the direction of the axis of rotation of the second screw element 32Y, while confronting the second helical element 32Y through a predetermined amount. On the other two sides of the partition 21Y-5, which divides the first transport compartment and the second transport compartment, goes in the direction of the axis of rotation of the second screw element 32Y, while confronting the second helical element 32Y through a predetermined amount.

The second screw element 32Y, the sides of which are surrounded by walls, transports shown Y-developer held in the spiral blade 34Y, in the direction of the rotation axis from the left side to the right side on Fig when mixing Y-Pro is representative of the direction of rotation according to the adjustment of the rotation. Because the second screw element 32Y and the developing sleeve 24Y are placed parallel to each other, the conveying direction of the Y-developer is a direction along the direction of the axis of rotation of the developing sleeve 24Y. The second screw element 32Y delivers the Y-developer to the surface of the developing sleeve 24Y in its axial direction.

The Y developer conveyed near the end of the right side in the drawing of the second screw element 32Y, enters the first transport compartment through the opening provided in the partition 21Y-5, and is then trapped in the spiral blade 28Y first screw element 26Y. According to the adjustment of the rotation of the first screw element 26Y Y-developer is transported along the direction of the axis of rotation of the first screw element 26Y from the left side to the right side in the drawing with stirring in the direction of rotation.

In the first transport section, in part of the region in which the first screw element 26Y is surrounded by plate 21Y-3 the left side of the septum and 21Y-5 housing, the sensor 45Y concentration Y-toner is attached to the bottom wall of the housing. The sensor 45Y concentration Y-toner detects, from the bottom of the first screw element 26Y, the permeability of the Y developer conveyed along the direction of the axis of rotation by means of the first screw element 26Y, and outputs the voltage value with testwuide the result of the detection, in the control unit 500. Because the permeability of the Y developer has a correlation with the concentration of Y-Y toner-developer, the control unit 500 acquires the concentration of the Y-toner based on the value of the output voltage from the sensor 45Y concentration Y toner.

Unit 1 of the printer includes a not shown blocks supply Y-, C-, M - and K-toner for a separate supply Y-, C-, M - and K-toner in the developing Y-, C-, M - and K - devices. The control unit 500 stores the Vtref for Y, C, M, and K, which indicates the target value of the output voltage of the sensor 45Y, 45C, 45M, and 45K concentration Y-, C-, M - and K-toner in the RAM 502. When the difference between the values of the output voltage of the sensors, the concentration of Y-, C-, M - and K-toner and Vtref for Y, C, M, and K is greater than a predetermined value, power supply Y-, C-, M - and K-toner is given to the time corresponding to the difference. As a result, Y-, C-, M - and K-toner is supplied from the entry slot of the toner (for example, Fig)provided on the inlet side of the first conveying section to processor Y-, C-, M - and K-devices, in the first transport compartment. Density Y-, C-, M - and K-toner Y-, C-, M - and K-developers are supported in a fixed range.

The permeability of the developer demonstrates a satisfactory correlation with bulk density of the developer. Bulk density of the developer fluctuates due to developer mode without serving the tion, even if the toner concentration of the developer is fixed. For example, the developer, is not accepted for a long time in a state in which the developer is not shuffled by means of screw elements in the first transport chamber and a second transport compartment ejects the air from the toner particles and carriers due to the own weight of the developer. The amount of charge of toner particles is reduced. Thus, the bulk density of the toner gradually increases as time passes without maintenance. According to the increase of bulk density permeability gradually increases. When the toner is not maintained for a long period, the increase in bulk density and saturated permeability. In the saturated state, the distance between the magnetic carriers is small compared to the distance to the developer during the creation of the image (during mixing). Consequently, the fall in the concentration of toner in comparison with the original is correctly detected.

On the other hand, when the developer in which the bulk density is increased and the permeability of the saturated because the developer was left without maintenance for a long time, stirred by means of screw elements in the first storage compartment and the second storage compartment, air grippers is moved between toner particles and between the magnetic media, as well as the magnitude of the triboelectric charge of the toner particles increases. Therefore, after leaving the developer in the first conveying compartment and the second storage compartment without maintenance for a long period, when the so-called mixing at slow speed for rotation of the screw elements without performing manifestation begins, as shown in Fig, bulk density decreases rapidly immediately after the start of mixing at slow speed until, until it takes approximately 3 minutes. This is because the air is captured in the developer, and the magnitude of the triboelectric charge of the toner particles increases rapidly. Therefore, although the rate of decrease of the bulk density decreases bulk density gradually decreases as time goes by mixing at slow speed. This is because the magnitude of the triboelectric charge of the toner particles increases slightly according to the abrasion of the externally added agent added to the toner particles. In particular, as shown in Fig, externally added agent H to increase the fluidity of the toner powder is added to the particles of the toner T. When externally added agent H is gradually eroding under stirring at slow speed of the developer, the friction force between the particles of the toner T postopen is increasing. The magnitude of the triboelectric charge of the toner particles is almost saturated until then, until about 3 minutes immediately after the start of mixing at slow speed. Then, when the friction force between the particles of the toner T is incremented by abrasion of the externally added agent H, the magnitude of the triboelectric charge of the particles of the toner T is gradually increased according to increase of the friction force. As a result, in the period after 3 minutes from the beginning of mixing at slow speed bulk density of the developer gradually decreases as time passes. Particles of toner T in the default state shown in Fig. When 30 minutes passes from the beginning of mixing at slow speed, the particles of the toner T are in the state shown in Fig. The fluidity and bulk density can be measured by the method of checking the apparent concentration of the metal powder JIS Z2504: 2000.

As described above, the volume density of the developer gradually decreases in a long time as time goes by mixing at slow speed. As shown in Fig, the permeability of the developer (the output signal Vt of the sensor to the concentration of toner) gradually decreases, and the result of detecting the concentration of toner deteriorates. Further significant difference is displayed is on Fig, occurs in the output signal Vt of the sensor to the concentration of toner between the time immediately after the start of mixing at slow speed and by the time 30 minutes after the start, although the toner concentration of the developer is fixed. This leads to incorrect detection of the toner concentration.

In the developing device described in patent application laid Japan 6-308833, for the purpose of preventing the occurrence of such incorrect detection of the pressure of the developer in the area where the toner concentration is detected by a sensor of the concentration of toner in the whole area of the unit transporting the developer, is set higher than the pressure of the developer in other areas. However, this pressure indicates the pressure in the conveying direction of the developer (in the direction of the axis of rotation of the screw elements). According to experiments of the inventors satisfactory correlation is established between this pressure and the degree of occurrence of incorrect detection.

On Fig shows a diagram of the device 22K transportation of the developer in the developing device K. In the drawing in the first storage compartment that includes a first screw element 26K for K, the bottom wall 21K-6 is opposed to the lower side in the direction of gravity of the first screw element 26K after a predetermined elapsed is K. Plate 21K-3 left side is opposed to one of both lateral sides orthogonal to the direction of the axis of rotation of the first screw element 26K via a predetermined gap. Wall 21K-5 is opposed to the other of the two transverse directions through a predetermined amount. K-developer 900K is found not only in the spiral blade 28K first screw element 26K, but also in the gap between the outer edge of the spiral blade 28K and plate 21K-3 left side, in the gap between the outer edge of the spiral blade 28K and the bottom wall 21K-6 and in the gap between the outer edge of the spiral blade 28K and wall 21K-5. The sensor 45K concentration of the K-toner is fixed to the casing of the developing device cannot detect the concentration of K-K toner-developer in the spiral blade 28K at a relatively considerable distance, since the sensor 45K concentration of K toner has a relatively small range of detectable distance. The sensor 45K concentration of K toner can detect only the concentration of the K-toner K-developer 900K contained in the gap between the spiral blade 28K and the bottom wall 21K-6. Therefore, the K-developer 900K in the gap must be sufficiently pressed. However, the pressing force generated by rotation of the first screw element 26K, mainly acts on the K-developer 00K, contained in the spiral blade 28K, in the conveying direction (the direction of the axis of rotation). Even if the K-developer 900K in spiral blade 28K sufficiently pressed in the direction of transportation, K-developer 900K in the gap may not be sufficiently pressed. As a result, a satisfactory correlation is not established between the pressure in the conveying direction, is applied to the developer, and the degree of occurrence of incorrect detection of the toner concentration.

It was found that the developing device shown in the drawing, has the disadvantage described below. When the K-developer 900K is not pressed against the surface of the sensor 45K concentrations of K-toner with sufficient pressure according to the rotation of the first screw element 26K, replacing the K-developer 900K near the sensor 45K concentration of the K-toner is not running actively. Regardless of the fact that the first screw element 26K rotates repeatedly, the same K-developer 900K remains near the sensor 45K concentrations of K-toner over a long period of time, and the concentration of the K-toner K-developer 900K continues to be detected. As a result, significant changes in the concentration of K-toner K-developer 900K is not detected quickly.

Therefore, it is necessary to increase the contact force in the direction of rotation of the screw and press the developer tightly to the Ergneti detection permeability sensor the concentration of toner instead of increasing the pressing force in the axial direction of the screw (the conveying direction) by the developer. On Fig surface detection permeability sensor 45K concentration of the K-toner is brought into contact with the K-developer 900K in the first transport section. However, as shown in Fig, wall (in the example shown in the drawing, the bottom wall 21K-6) of the first conveyor compartment can be placed between the K-developer 900K in the first transport module and sensor 45K concentration of K toner. You must then press the K-developer 900K tightly to the wall, which is placed between the K-developer 900K and sensor 45K concentrations of K-toner by the force of the rotation of the first screw element 26K.

Typical structure of a copier according to this variant implementation is illustrated.

On Fig shows a cross-section of the device 22K transportation of the developer for K. On the drawing of the first conveyor compartment that includes a first screw element 26K, has a clamping wall 39K. Pressing wall 39K provided, at least in part, the entire area of the first conveyor compartment as a unit of transport of the developer. In particular, the presser wall 39K provided in the region opposite the bottom wall 21K-6 of the first conveyor compartment on the bottom side in the direction of gravity of the first screw element 26K and opposite side walls (plate 21K-3 left side and Perigord and 21K-5) of the first conveyor compartment on both lateral sides, orthogonal to the direction of the axis of rotation of the first screw element 26K. In this area the concentration of the K-toner transported into the K developer is detected by a sensor 45K concentrations of K-toner (for example, the area indicated by alternate long and short dashed line X in Fig).

As shown in Fig, clamping wall 39K imposed between the plate 21K-3 left side wall 21k-5 of the first conveyor compartment and closes the first transport compartment on top. Curved surface along the curve of the spiral blade 28K formed on the surface of the pressing wall 39K, opposite the first helical element 26K. This clamping wall 39K comes in contact, from above in the vertical direction, with the K-developer 900K, moving up from the lower side in the direction of gravity according to the rotation of the first screw element 26K, and presses the K-developer 900K down in the vertical direction. Pressing wall 39K pushes the K-developer 900K present in a spiral between the first coil element 26K, in the radial direction of rotation of the first screw element 26K compression K-developer 900K. Next part of the K-developer 900K contained in a spiral between the first coil element 26K, is pushed into the gap between the outer edge of the spiral blade 28K and lower stenko the 21K-6 of the first conveyor compartment, to pin K-developer 900K present near the surface detecting sensor 45K concentrations of K-toner tightly to the sensor. Therefore, incorrect detection of the concentration of the toner due to fluctuations in the amount of toner can be reduced more than before, through tightly pressed K-developer 900K to the surface detecting sensor 45K concentration of K toner.

A copying machine includes a blade 29K return shipments in the first screw element 26K in addition to the pressing wall 39K in the first transport compartment to further reduce incorrect detection of the concentration of the toner due to fluctuations in the amount of toner. In particular, Fig shows a side view of the first screw element 26K for K in the copy machine. The drawing element 27K in the form of a rotating shaft is driven to rotate in the direction of the arrow B in the drawing. The spiral blade 28K provided in the form of protrusions on the outer surface of the element 27K to have a slope angle θ1 in relation to the axis of rotation of the element 27K in the form of a rotating shaft (the direction of passage of the line L1). There are four angle formed by the line L1 and the line L3, going in the direction of the spiral blade 28K, on the outer surface of the element 27K in the form of a rotating shaft. Of the four corners, every two angle I which are equal angles, because the angles are vertical angles. Thus, there are two angle formed by the intersection of the line L1 and the line L3. The angle θ1 is smaller of the angles (θ2, described hereinafter, the same).

In spiral blade 28K first screw element 26K blade 29K return shipments is provided in the form of protrusions on the outer surface of the element 27K in the form of a rotating shaft between the two opposing surfaces that are opposite the direction of the axis of rotation (the direction of the pass line L1). The direction of travel of the blade 29K reverse transport (direction passing through line L4) on the outer surface of the element 27K in the form of a rotating shaft has a slope opposite to the slope of the spiral blade 28K, relative to the direction of passage of the line L1. The angle is θ2.

The spiral blade 28K transports not shown K-developer in the direction of arrow D in the drawing along the direction of the axis of rotation according to the rotation around 27K in the form of a rotating shaft. On the other hand, the blade 29K reverse transport transports K-developer in the direction of the arrow C opposite to the conveying direction of the spiral blade 28K, according to the rotation around 27K in the form of a rotating shaft. Blade 29K return shipments is provided in the form of protrusions in which castke element 27K in the form of a rotating shaft in the area, the bottom side is in the direction of gravity is opposed to the bottom wall of the first transport compartment (21K-6 Fig) as a unit of transport of the developer and both transverse sides which are orthogonal to the direction of the axis of rotation, opposed lateral walls of the first transport compartment (21K-3 21K-5 Fig), respectively, in the entire region of the direction of the axis of rotation of the first screw element 26K. Although the blade 29K return shipments are not shown on Fig and 19 for convenience of illustration, the sensor 45K concentration of the K-toner is placed so as to detect the concentration of K-K toner-developer transported between the blade 29K reverse transportation and plot the spiral blades (section along line L3 on Fig), adjacent to the blade 29K return shipments.

K-developer transported in the blade 29K return shipments, and K is the developer transported in the area of the spiral blade adjacent the blade 29K reverse transport (land adjacent to the blade return shipments), facing each other between the blade 29K reverse transportation and land adjacent to the blade return shipments. Consequently, K is the developer ejected in the normal direction. K-developer available near the surface detecting sensor 45K concentration of toner in the gap between the outer edge of the first screw element 26K and the bottom wall 21K-6) of the first conveyor compartment, firmly pressed against the surface of the detection. According to the increase of the pressing force of the blade 29K return shipments and increase the pressing force by the pressing wall 39, incorrect detection of the toner due to fluctuations in the amount of toner is additionally reduced. Additionally, the developer near the surface of the detection is actively replaced by retracting the developer from the surface of the detection under strong pressure to the surface of the detection according to the rotation of the blade 29K return shipments. As a result, it is possible to further reduce the incorrect detection of the concentration of the toner due to fluctuations in the amount of toner by not leaving of the developer near the surface of the detection and a constant supply of new developer to the surface of the detection.

Two opposing surfaces of the spiral blade 28K, opposing each other along the blade 29K reverse transport of, not connected with the blade 29K return shipments. Gaps are formed between the opposing surfaces and blade 29K return shipments. Therefore, part of the K-developers, which collide with each other due to the opposite movement between the blade 29K reverse transportation and land adjacent to the blade return shipments, the spiral blade nu is 28K, transported along the spiral gap when passing through the gaps, as shown in Fig.

On Fig is a diagram of the dependencies between transformation value of the toner concentration (% weight) of the output signal Vt of the sensor to the concentration of toner (Volts) and the time of stirring at slow speed (minutes) at a time when the K-developer having a concentration of the K-toner 8 (percent weight), stirred at slow speed. From the graph we see that the number of incorrect detections concentration of the toner is reduced, when the first screw element comprising a blade reverse transport is used. It is also seen that when the blade reverse transportation is provided, the smaller the concentration of toner can be detected when the pressure wall is provided than when the presser wall is not provided. Moreover, it can be seen that when the blade 29K return shipments is provided in addition to the pressing wall 39K, toner darkness, almost with the same value continues to be detected immediately after the start of mixing at slow speed until until 120 minutes. This is because of incorrect detection of the concentration of toner due to a change in bulk density of the developer, is practically eliminated. For example, related to the spine between the output signal Vt of the sensor to the concentration of toner (C) and toner concentration (% weight) shown in Fig.

In experiments in which data on Fig and 24 going, screw element, described below, is used as the first screw element. The step of placing in the direction of the axis of screw rotation of the spiral blade is 25 mm, the angle θ2 of inclination from the axial direction of the blade reverse transport is 45°, and the height of projection from the surface of the element in the form of a rotating shaft of the blade opposite the transport is the same as the height of the spiral blade. The blade opposite the first transportation screw element is connected with the blade, spiral blade, the end of production in the conveying direction of the developer which is placed adjacent to the blade reverse transport on the output side in the conveying direction of the developer between the spiral blades of the blade, as shown in Fig. On the other hand, given the gap shown in the drawing, between the end of the inlet in the direction of transport of the developer blade reverse transportation and blade spiral blade near the blade reverse transport on the intake side in the conveying direction of the developer. The developer in the first coil element is transported while passing through the gap. As a sensor of the toner concentration sensor is used, the concentration of toner diameter surface detection is otorongo is 5 mm. The sensor of the concentration of toner is placed so as to place the center of the surface detection at a position opposite the point of intersection of the line L3 and the line L4 on Fig. As the pressure wall (for example, 39K) used pressure wall, the length in the direction of the screw axis (length in the conveying direction of the medium) is 25 mm, which covers the entire ceiling of the first conveyor section and covers only part of the region in the conveying direction of the first developer conveying compartment, as shown in Fig. The experiments have been conducted under the same conditions, except for the angle θ2 of inclination when the data was collected on Fig.

On Fig, since the angle θ2 relative to the line L2 of the blade 29K reverse transport is set closer to 45°, the possibility of transporting the developer in the direction of the arrow C through the blade 29K return shipments can be improved. When the angle θ2 is set to less than 45°because the angle θ2 is set smaller, the possibility of transporting the developer in the direction of rotation is increased due to the low possibility of transporting the developer in the direction of the arrow C. When the angle θ2 is set to 0°, the possibility of transporting the developer in the direction of rotation is greatest. In experiments conducted by the inventors, the number of incorrect detection is of the concentration of the toner can be further reduced, when the blade 29K reverse transportation is provided at an angle θ2, a large 0°than when the angle θ2 is set to 0° (the developer can be more tightly pressed on the surface of the sensor to the concentration of toner). When the angle θ2 is set to 45°, i.e. when the possibility of transporting the developer in the direction of the arrow C the largest number of incorrect detections concentration of toner can be most heavily discounted. For reference values of the transformation of the concentration of the toner of the output signals of the sensor when the angle θ2 is 45, 20 and 0° is shown in Fig.

As shown in Fig, gaps are provided between the two opposing surfaces of the spiral blade 28K and blade 29K return shipments, respectively. Not shown K-developer contained between the opposing surfaces, smoothly moves along the spiral gap when passing through the gap. Not always necessary to provide a gap between two opposing surfaces and blade 29K return shipments. However, preferably, at least, to provide a gap between the opposing surface and the blade 29K return shipments, as shown in Fig and 27. This is because when two opposing surfaces are bridged by blade 29K return shipments, asanoha on Fig, transportation K-developer in the normal direction (the direction of arrow D in the drawing) along the direction of the axis of rotation is substantially hampered by the blade 29K return shipments to occlude the area under the pressing wall 39K K-developer.

For reference, the characteristics of detecting the concentration of toner in a time when gaps are provided between the two opposing surfaces and blade 29K return shipments and at a time when the two opposing surfaces are bridged by blade 29K return shipments shown in Fig. Only from the point of view of the dense pressure of the developer to gauge the concentration of toner in order to reduce the number of incorrect detections concentration of toner, it is preferable to connect the jumper on two opposing surfaces with the blade 29K return shipments, as shown in the drawing. However, when two opposing surfaces connected by a crosspiece, and a continuous printing operation is actually executed, the plot of the retainer wall is sealed by the developer immediately after the supply of toner.

In experiments in which data are collected on Fig, screw element, described below, is used as the first screw element having a blade return shipments. The step of placing the axis direction of the screw rotation of the spiral blade is 25 mm, the angle θ2 of inclination from the axial direction of the blade reverse transport is 45°, and the height of projection from the surface of the element in the form of a rotating shaft of the blade opposite the transport is the same as the height of the spiral blade. The blade opposite the first transportation screw element is connected with the blade, spiral blade at the end of the intake and at the end of the issue in a slightly twisted form Fig. Alternatively, as shown in Fig, is formed a gap between the end of production in the conveying direction of the developer and the spiral blade. As a sensor of the toner concentration sensor is used the concentration of toner, the diameter of the surface of the detection of which is 5 mm Probe concentration of toner is placed so as to place the center of the surface of the detection to the position opposite the point of intersection of the line L3 and the line L4 on Fig. As the pressure wall (for example, 39K) used pressure wall, the length in the direction of the screw axis (length in the conveying direction of the medium) is 25 mm, which covers the entire ceiling of the first conveyor section and covers only part of the region in the conveying direction of the first developer conveying compartment.

As blade 29K return shipments, in addition to the blade 29K return shipments form, while the Anna on Fig, blade 29K reverse transport of a flat rectangular shape (flat shape)shown in Fig, blade 29K reverse transport of twisted forms shown in Fig, blade 29K reverse transport forms, deepening in the direction of movement of the K-developer (the direction of the arrow E in the drawing) in the spiral space (curved shape)shown in Fig, etc. can be adjusted. Parallel rib and rib straight direction as the blade element, described below, can also be edges smooth shapes, twisted shape or curved shape.

As shown in Fig and 20, the sensor of the concentration of the toner (for example, 45K) is placed so as to detect the toner concentration of the developer additionally below in the direction of gravity than the center axis of rotation of the first screw element 26K as part of the mixing and transport (the center of the element 27K in the form of a rotating shaft). In the first transport compartment, which contains the first screw element 26K, the storage capacity of the developer in the conveying direction of the developer varies slightly over time. Thus, the surface of the developer (the top surface) is also slightly varies to a certain degree range. In this first storage compartment when the sensor 45K concentration of toner places the I, to detect the concentration of toner is advanced over the direction of gravity than the center of the element 27K in the form of a rotating shaft, it is likely that the residence time of the surface of the developer under the sensor is formed. When the surface of the developer is placed under the sensor, the greater the incorrect definition occur because the toner concentration cannot be detected. On the other hand, when the sensor 45K concentration of toner is placed so as to detect the concentration of toner additionally below in the direction of gravity than the center of the element 27K in the form of a rotating shaft, the emergence of such incorrect detection can be prevented. This is because even if the storage capacity of the developer fluctuates in the first transport section, the surface of the developer does not go below the center of the element 27K in the form of a rotating shaft.

On Fig first screw element 26K shown from the side on which the first screw element 26K seems to be rotating counterclockwise. When the first screw element 26K and its peripheral structure visible from this side, pressing wall 39K is placed on the position of the first quadrant (upper right part of the screw) to the position of the second quadrant (upper left part of the screw)to cover the entire area in the width direction of the first conveying compartment. attic 45K concentration of toner is placed in the position of the fourth quadrant around the screw (bottom right part of the screw).

As shown in Fig, sensor 45K concentration of toner can be placed in the position of the third quadrant (lower left part of the screw instead of the fourth quadrant (lower right part of the screw). In the position of the fourth quadrant, as explained with reference to Fig, the developer is moved from the lower side to the upper side in the direction of gravity according to the rotation of the blade 29K return shipments. On the other hand, the developer is pressed down in the direction of gravity through the pressure wall 39K to be pushed in the direction of the radius of rotation (normal direction) of the first screw element 26K under compression. As a result, in the fourth quadrant of the developer present near the surface detecting sensor 45K concentration of toner in the gap between the outer edge of the first screw element 26K and the bottom wall 21K-6 of the first conveyor compartment, firmly pressed against the surface of the detection. On Fig the third quadrant is adjacent to the fourth quadrant on the intake side in the conveying direction of the developer. In the third quadrant of the downforce on the developer formed in the fourth quadrant extends from the fourth quadrant. Thus, the developer, existing near the surface detecting sensor 45K concentration of toner in the gap, is pressed against the surface is ti detection with less downforce, than in the fourth quadrant. This enables to prevent incorrect detection of the toner concentration. However, the power drain by the pressing wall 39K acting on the developer, more in the third quadrant. While the developer is ready to move up in the direction of gravity under its own weight, the blade 29K return shipments ready to raise the developer in the opposite direction. As a result, the clamping force of the developer to the surface of the detection becomes more. Therefore, the number of incorrect detections concentration of the toner can be further reduced.

As described above, in the form shown in Fig, sensor 45K concentration of toner is placed in the fourth quadrant so as to detect the toner concentration of the developer, which acts downward clamping force in the direction of gravity through the pressure wall 39 when moving upward from below in the direction of gravity according to the rotation of the first screw element 26K. Therefore, the number of incorrect detections concentration of the toner can be further reduced than when the sensor 45K concentration of toner is placed in the third quadrant, in which the developer is moved down from above in the direction of gravity according to the rotation of the first screw element 26K.

the copy machine presser wall 39K is only part of the whole area in the conveying direction of the developer in the first conveying compartment as a unit of transport of the developer. In particular, the presser wall 39K is only available in the region, which includes the blade 29K return shipments in the first screw element 26K in the entire region of the first conveying compartment. When the pressure of the developer increases significantly once the pressing wall 39K, you can force the developer existing on the inlet side in the conveying direction of the developer than the pressure wall 39K, to wrap around the clamping wall 39 under increasing pressure to act to prevent further increase in pressure. This helps to prevent clogging of the developer of the area immediately under the presser wall 39K. On the other hand, if the whole area in the conveying direction of the developer coated with anti-squeak wall 39K, it is likely that there will be blockages in the area immediately under the pressing wall 39K by the developer.

As shown in Fig and 36, the entire area around the first screw element 26K doesn't always have to be filled in by the developer directly under the presser wall 39K. As shown in Fig, storage volume of the developer may be sufficient only to fill the gap between the screw and the pressing wall 39K, with the exception of the second quadrant (upper left part of the screw) of the four quadrants. Even if the storage capacity of the developer is relatively small so the m way if the gap is in the first quadrant (upper right part of the screw) is filled with the developer, the power drain by pressing wall 39K is set to the developer, moving up from below in the direction of gravity in the first quadrant. This allows tightly pressed developer to the surface detecting sensor 45K concentration of toner in the fourth quadrant (lower right part of the screw) and the third quadrant (lower left part of the screw).

It is not always required to provide the clamping wall 39K so as to cover the entire area in the width direction of the first conveying compartment. This is because if the pressure wall 39K is placed so as to cover at least the first quadrant (upper right part of the screw), as shown in Fig, the developer can be held tightly against the surface detecting sensor 45K concentration of toner in the third quadrant (lower left part of the screw) and the fourth quadrant (lower right part of the screw).

The magnitude of the projection L6 blade 29K reverse transport in the normal direction from the external surface of the element 27K in the form of a rotating shaft is set greater than the magnitude of the projection L5 of the spiral blade 28K in a normal direction from the external surface of the element 27K in the form of a rotating shaft. The tip of the blade 29K return shipments that moved to the position of naprashivaetsya 45K concentrations of K-toner according to the rotation of the first screw element 26K, is closer to the sensor than the tip of the spiral blade 28K to pin K-developer more tightly to the sensor than when the magnitude of the projection L6 is set equal to or lower projection L5. This enables to reduce the number of incorrect detections concentration of K toner.

On Fig is a diagram of the dependencies between the output signal Vt of the sensor to the concentration of toner (C) during mixing at slow speed and time of mixing at slow speed (sec). As shown in the drawing, the relationship between the output signal Vt of the sensor of the toner concentration and the time of mixing at slow speed signal is sinusoidal. This is because the clamping force of the developer applied to the sensor 45K concentration of toner is greatest when the blade 29K reverse transport of the first screw element 26K passes the area in front of the sensor 45K concentration of toner according to the rotation of the blade 29K return shipments. When the pressure sensor is attached instead of the sensor 45K detect the concentration of K toner in the device 22K transportation of the developer for K, the relationship between the output signal of the sensor Vt concentration of K toner and the expired time is also a sinusoidal signal similar to the waveform shown in the drawing. Per the od of the waveform is the same as the period of the waveform at Fig. At that time, when the blade 29K reverse transportation passes a position opposite the sensor 45K concentrations of K-toner according to the rotation of the first screw element 26K, the output signal Vt of the sensor to the concentration of toner is the greatest (maximum point of the sine wave), and the concentration of the K-toner is accurately detected.

In the copy machine that demonstrates these characteristics detecting when the output signal Vt of the sensor to the concentration of toner while the lower limit point of the sinusoid is adapted to control the concentration of toner or the output signal Vt of the sensor to the concentration of toner at the upper limit point is adapted to control the concentration of toner precise control of the concentration of the toner is difficult, because the number of incorrect detections varies. Thus, in the copier 500 block management as a management tool collects the output signal Vt of the sensor to the concentration of toner many times in the pre-defined period, and then retrieves the results of the detection results having values higher than the average of the multiple detection result, and controls the conversion unit supply toner based on the extraction result. Therefore, the concentration of the toner can be more accurately monitored, h is m when the output signal Vt of the sensor to the concentration of toner in the upper time limit or the lower limit time is adjusted on a random basis.

On Fig presents a flowchart of the sequence of processing operations to control the concentration of toner is performed by the control unit 500. The drawing shows the flow control of the concentration of toner in only one color. However, in the actual application of the same processing control the concentration of toner is performed in parallel for the respective colors Y, C, M and K. In the drawing, first, a predetermined number of output signals Vt sensor the concentration of toner is sampled with predetermined intervals in a predetermined time (step S21). After calculating the average Vt_ave data sampling (step S22), the control unit 500 extracts only the output signal Vt of the sensor to the concentration of toner, large medium Vt_ave, of the discretized output signal Vt of the sensor to the concentration of toner (step S23). After re-calculating the average of only the extracted data (step S24), the control unit 500 causes the power supply of toner only for the time corresponding to the Vt_ave' recalculate to apply the toner (step S25).

In the example explained above, the plate 21K-3 left side and the wall 21K-5 of the first conveyor compartment are connected by a jumper by pressing wall 39K. However, it is not always necessary to connect perepichka the plate 21K-3 left side wall 21K-5. If you can enter the clamping wall 39K in contact with the K-developer which moves from the lower side to the upper side in the direction of gravity according to the rotation of the first screw element 26K, from above in the direction of gravity, pressure wall 39K may be partially provided between the plate 21K-3 left side wall 21K-5. The device 22K transportation of the developer for K explained. However, transportation of the developer for other colors have the structure same as the structure of the device 22K transportation of the developer for K.

Modification of a copier according to a variant implementation is explained below. Unless otherwise indicated specifically, the structure of the copying apparatus according to the modification are the same as in the first embodiment.

On Fig shows a side view of the first screw element 26K in the developing device, for K copier according to the first modification. In the first screw element 26K parallel fin 31K as an element of the blade is provided in the form of protrusions on the outer surface of the element 27K in the form of a rotating shaft in place of a blade return shipments. Parallel edge 31K provided in the form of protrusions on the outer surface of the element 27K in the form of a rotating shaft in position, running in the axial direction of the element 27K as a rotating shaft. Parallel edge 31K moves the developer in the normal direction (the direction of the radius of rotation of the first screw element 26K according to the rotation of the parallel fin 31K. This allows tightly pressed developer to the surface of the detection sensor not shown in the concentration of toner. In addition, the developer present near the surface of the detection, actively replaced by retracting the developer from the surface of the detection under strong pressure to the surface of the detection according to the rotation of the parallel fin 31K. As a result, incorrect detection of the concentration of the toner due to fluctuations in the amount of toner can be reduced.

On Fig is a diagram of the dependencies between transformation value of the toner concentration (% weight) of the output signal Vt of the sensor to the concentration of toner (C) and time of mixing at slow speed (rpm) at a time when K-developer having a concentration of the K-toner 8 (percent weight), stirred at slow speed in the first screw element 26K, shown in Fig. As shown in the drawing, you can see that the number of erroneous detection of the toner concentration increases according to the increase of mixing time in slow speed, when the first screw element comprising a parallel edge, use the is, and clamping the wall is not provided, when the first coil element, which does not include the parallel edge is used, and the pressure wall is not provided, and when the first screw element, which does not include the parallel edge is used, and the pressure wall is provided. On the other hand, it is seen that the density of the toner with almost the same value continues to be detectable until then, until 120 minutes immediately after the start of mixing at slow speed, when the first screw element comprising a parallel edge is used, and the pressure wall is provided. In light of these results, experiments in the developing device according to the first modification of the first screw element 26K, includes parallel fin 31K, is used, and the pressure wall is provided in the first transport section.

For reference, the relationship between the output signal Vt of the sensor to the concentration of toner (C) and toner concentration (% weight) shown in Fig. When the pressure wall is not provided, the developer, moving up from below in the direction of gravity according to the rotation of the first screw element is not pressed back down in the direction of gravity. Therefore, the developer is not pressed in the gap, and the number of erroneous detections con is entrale toner more than when the presser wall is provided.

In experiments in which data on Fig and 41 are collected, screw element, described below, is used as the first screw element. The step of placing in the direction of the axis of screw rotation of the spiral blade is 25 mm, and the height of projection from the surface of the element in the form of a rotating shaft parallel ribs is the same as the height of the spiral blade. Parallel edge of the first coil element is connected with the blade, spiral blade, the end of production in the conveying direction of the developer which is close to parallel with the edge on the output side in the conveying direction of the developer between the spiral blades of the blade, as shown in Fig. On the other hand, given the gap shown in the drawing, between the end of the inlet in the direction of transport of the developer of parallel ribs and the spiral blade of the blade, next to the parallel edge on the inlet side in the conveying direction of the developer. The developer in the first coil element is transported while passing through the gap. As a sensor of the toner concentration sensor is used the concentration of toner, the diameter of the surface of the detection of which is 5 mm Probe concentration of toner is placed so as to place the center of the surface of the OBN is pursued in a position opposite the center in the direction of the axis of rotation parallel ribs. As the pressure wall (for example, 39K), use a pressure wall, the length in the axial direction of the screw (length in the conveying direction of the developer) is 25 mm, which covers the entire ceiling of the first conveying region and covers only part of the region in the conveying direction of the first developer conveying compartment, as shown in Fig.

As already described, the parallel edge may be flat rectangular rib shown in Fig, hollow edge, the edge, Mylar or edge with Mylar, one-piece element in the form of a rotating shaft or spiral blade, etc.

On Fig shows a side view of the second example of the first screw element 26K in the developing device, for K copier according to the first modification. Parallel edge 31K first screw element 26K in the second example is connected with the blade, spiral blade, the end of the inlet in the direction of transport of the developer which is close to parallel with the edge 31K on the intake side in the conveying direction of the developer between the blades parallel ribs 31K. On the other hand, given the gap shown in the drawing, between the end of production in the conveying direction of the developer of parallel ribs 31K and blade, spiral blade, next to the parallel edge 31K on the thoronet release in the conveying direction of the developer. The developer in the first coil element is transported while passing through the gap. Therefore, the developer can actively be replaced near the surface of the sensor detection of the concentration of the toner under strong pressure to the sensor of the concentration of the toner according to the rotation of the parallel fin 31K.

On Fig shows a side view of part of the third example of the first screw element 26K in the developing device, for K copier according to the first modification. Parallel edge 31K first screw element 26K in the third example are connected with a spiral blade 28K at the end of the inlet and the end of production in the conveying direction of the developer between the blades of the spiral blade 28K and connects the jumper blade spiral blade 28K. Therefore, the developer can actively be replaced near the surface of the sensor detection of the concentration of the toner under strong pressure to the sensor of the concentration of the toner according to the rotation of the parallel fin 31K.

On Fig shows a side view of part of the fourth example of the first screw element 26K in the developing device, for K copier according to the first modification. At the end of the inlet and the end of production in the conveying direction of the developer of parallel ribs 31K in the first screw element 26K in the fourth example, the gaps formed between the end of the intake and you end USCA, and a spiral blade. The developer is transported by passing through the gaps. Therefore, the developer can actively be replaced near the surface of the sensor detection of the concentration of the toner under strong pressure to the sensor of the concentration of the toner according to the rotation of the parallel fin 31K.

On Fig shows a side view of the first screw element 26K in the developing device, for K copier according to the second modification. In the first screw element 26K fin 31K' direct transportation as an element of the blade is provided in the form of protrusions on the outer surface of the element 27K in the form of a rotating shaft in place of a blade return shipments. Fin 31K' direct transportation connects the jumper blade spiral blade 28K. The angle θ3 of inclination less than the angle θ1 of inclination of the spiral blade 28K (0° < θ3 < θ1 < 90°). Fin 31K' direct transportation provided at such an angle θ3 of inclination, transports the developer at the speed higher than the speed of the spiral blade 28K, in a direction same as the direction of the spiral blade 28K.

Between the fin 31K' direct transportation and the spiral blade 28K, fin 31K' direct transportation with large transport speed of the developer, presses the developer to the surface (the surface indicated by S1 in the drawing) spiralography 28K, having a lower transport speed of the developer. The part of the developer, is pressed against the surface of the spiral blade 28K, moves in the normal direction of the first screw element 26K along the surface of the spiral blade 28K. The part of the developer flows out of the first screw element 26K and tightly pressed against the surface detection sensor not shown in the concentration of toner. As a result, the developer, existing near the surface of the sensor detection of the concentration of toner is pressed tightly to the surface of the detection. The developer is drawn from the surface detection under strong pressure to the surface of the detection according to the rotation of the fin 31K' direct transportation to actively replace the developer, existing near the surface of the detection. As a result, incorrect detection of the concentration of the toner due to fluctuations in the amount of toner can be more reduced than previously.

There are four angle formed by lines L1, going in the direction of the axis of rotation of the first screw element 26K, and the line L7, going in the direction of passage of the fin 31K' direct transportation on the outer surface of the element 27K in the form of a rotating shaft. From the four corners of every two angles are the same angles as the angles are vertical angles. Thus, to include atrani two corners, formed by the intersection of the line L1 and the line L7. The angle θ3 is smaller of these angles. The angle θ3 fin 31K' direct shipment must always satisfy the condition of 0° < θ3 < θ1 < 90°" up until the angle θ3 not take the value at which the developer can be pressed against the retainer wall.

On Fig shows a side view of the second example of the first screw element 26K in the developing device, for K copier according to the second modification. Fin 31K' direct transportation of the first screw element 26K in the second example is connected with the blade, spiral blade, the end of production in the conveying direction of the developer which is placed adjacent to the fin 31K' direct transportation on the output side in the conveying direction of the developer between the blades parallel ribs 28K. On the other hand, given the gap shown in the drawing, between the end of the inlet in the direction of transport of the developer fin 31K' direct transportation and blade, spiral blade, near the fin 31K' direct transportation on the intake side in the conveying direction of the developer. The developer in the first coil element is transported while passing through the gap. Therefore, the developer can actively be replaced near the surface of the sensor detection of the concentration of the toner when the forces of the nom is provided to the sensor of the concentration of the toner according to the rotation of the fin 31K' direct transportation.

On Fig shows a side view of part of the third example of the first screw element 26K in the developing device, for K copier according to the second modification. Fin 31K' direct transportation of the first screw element 26K in the third example, is connected to the blade, spiral blade, the end of production in the conveying direction of the developer which is placed adjacent to the fin 31K' direct transportation on the output side in the conveying direction of the developer between the blades parallel ribs 28K. On the other hand, given the gap shown in the drawing, between the end of production in the conveying direction of the developer fin 31K' direct transportation and blade, spiral blade, near the fin 31K' direct transportation on the output side in the conveying direction of the developer. The developer in the first coil element is transported while passing through the gap. Therefore, the developer can actively be replaced near the surface of the sensor detection of the concentration of the toner under strong pressure to the sensor of the concentration of the toner according to the rotation of the fin 31K' direct transportation.

On Fig shows a side view of part of the fourth example of the first screw element 26K in the developing device, for K copier according to the second modification. At the end of the inlet and the end of the issue is the conveying direction of the developer fin 31K' direct transportation in the first screw element 26K in the fourth example, the gaps formed between the end of the inlet and the end of production, and a spiral blade. The developer is transported by passing through the gaps. Therefore, the developer can actively be replaced near the surface of the sensor detection of the concentration of the toner under strong pressure to the sensor of the concentration of the toner according to the rotation of the fin 31K' direct transportation.

As already described, the parallel edge may be flat rectangular rib shown in Fig, hollow edge, the edge, Mylar or edge with Mylar, one-piece element in the form of a rotating shaft or spiral blade, etc.

The sensor 45K concentration of toner is placed so as to detect the toner concentration of the developer additionally below in the direction of gravity than the center of rotation of the first screw element 26K. Therefore, as explained above, no significant incorrectly detecting the concentration of toner that occurs because the surface of the developer is placed under the sensor the concentration of toner.

In addition, the sensor 45K concentration of toner is placed in the fourth quadrant so as to detect the toner concentration of the developer, which acts downward clamping force in the direction of gravity through the pressure wall 39 when moving upward from below in the direction of gravity according to the rotation of the first screw element 26K. As the e described, the number of incorrect detections concentration of the toner can be further reduced than when the sensor 45K concentration of toner is placed in the third quadrant.

The first screw element 26K, which includes the element 27K in the form of a rotating shaft supporting the rotation of the spiral blade 28K provided in the form of bulges in spiral form on the outer surface of the element 27K in the form of a rotating shaft, is used as an element of mixing and transport. Blade 29K reverse transport, which transports the K-developer in the direction opposite to the conveying direction of the spiral blade 28K according to the rotation of the element 27K in the form of a rotating shaft, provided in the form of ledges in the area, opposite the pressing wall 39K, in the entire region in the direction of the axis of rotation of the element 27K in the form of a rotating shaft. As described above, the lift force on the K-developer to the sensor 45K concentration of the K-toner is increased by pressing the K-developer clamping wall 39K, as well as increased by the transportation K-developer in the opposite direction in the field, in front of the sensor, using the blade 29K return shipments. This gives the opportunity to reduce incorrect detection of the concentration of the toner due to fluctuations in the amount of toner. Also what about the, the developer is drawn from the surface detection under strong pressure to the surface of the detection according to the rotation of the blade 29K' return shipments to actively replace the developer, existing near the surface of the detection. As a result, the number of incorrect detections concentration of the toner can also be significantly reduced.

Used screw element, including the element 27K in the form of a rotating shaft supporting the rotation of the spiral blade 28K provided in the form of bulges in spiral form on the outer surface of the element 27K in the form of a rotating shaft. Parallel edge 31K or fin 31K' direct transportation as an element of the blade, which moves the developer in the normal direction according to the rotation of the element 27K in the form of a rotating shaft or moves the developer in the same direction as the direction of movement through the spiral blade 28K, provided in the form of ledges in the area, opposite the pressing wall 39K, in the entire region in the direction of the axis of rotation of the element 27K in the form of a rotating shaft. Therefore, the developer can actively be replaced near the surface of the sensor detection of the concentration of the toner under strong pressure to the sensor of the concentration of the toner according to the rotation of the parallel fin 31K or fin 31K' direct transportation.

The magnitude of the projection L6 blade 29K reverse transport in the normal direction from the external surface of the element 27K in the form of a rotating shaft is set greater than the magnitude of the projection L5 of the spiral blade 28K in a normal direction from the external surface of the element 27K in the form of a rotating shaft. Therefore, the number of incorrect detections concentration of the toner can be further reduced than when the magnitude of the projection L6 is set equal to or lower projection L5.

Pressing wall 39K provided only part of the whole area in the conveying direction of the first developer conveying compartment. Therefore, as explained above, the occlusion area immediately under the presser wall 39K by the developer can be prevented.

The control unit 500 collects the results of detection by a sensor of the concentration of toner as a means of detecting the concentration of toner many times, then extracts only the results with the values above, than the average in the results obtained, and controls the conversion unit supply toner based on the extraction result. Therefore, as described above, the toner concentration can be controlled more accurately than when the result of detection at an arbitrary point in time directly adapts.

The developer, which moves from the lower side to the upper side in the direction of gravity according to the rotation of the mixing element and transportation, pressed down in the direction of gravity by means of the retainer wall to push the developer in the mixing and transport in the direction of the radius of rotation of the mixing element and transportation during the compression of the developer. The developer, existing near the surface of the detection unit detecting the concentration of toner in the gap between the outer edge of the mixing and transportation and the wall of the unit transporting the developer, strongly pressed against the surface of the detection by the ejection of the developer in the direction of the rotation radius of the inside element of mixing and transport. Incorrect detection of the concentration of the toner due to fluctuations in the amount of toner can be more reduced than before, through the strong pressure of the developer to the surface of the detection unit detecting conc the AI toner thus.

Although the invention is described relative to specific embodiments for complete and clear essence, the attached claims should not be limited thereby but should be considered as performing all modifications and alternative structures that may be obvious to experts in the field of the invention within the framework of the basic techniques outlined in this document.

1. The device transporting the developer containing unit transporting the developer made with the possibility to transport the developer containing the toner and the carrier in the direction of the axis of rotation for stirring the developer by rotation of the mixing element and transportation, and
the unit for determining the concentration of toner is arranged to determine the concentration of toner in the developer transported in the transport of the developer, while
shroud wall is provided on a plot of the total area of the transport direction of the developer in the unit transporting the developer, thus clamping the wall comes into contact from above with the developer, which moves from the lower side to the upper side according to the rotation of the mixing element and transporting and pressing the developer down
this plot is located opposite the bottom wall of the transport block is irowiki developer on the lower side in the direction of the element mixing and transport, and opposite side walls block the transportation of the developer on both lateral sides, orthogonal to the direction of the axis of rotation of the mixing element and transportation, and
the concentration of toner transported developer is determined by the block determining the concentration of toner in this area, while
item mixing and transporting contains screw element, including the element in the form of a rotating shaft supporting rotation and spiral blade on the outer surface of the element in the form of a rotating shaft, and
blade reverse transport for transporting the developer in a direction opposite to the conveying direction of the spiral blade according to the rotation of the element in the form of a rotating shaft, and is made in the form of a protrusion on the site opposite the pressure wall, in the entire region in the direction of the axis of rotation of the element in the form of a rotating shaft.

2. The device according to claim 1, characterized in that the detection unit concentration of toner placed on the site to determine the toner concentration of the developer, the available lower than the center of the element mixing and transport.

3. The device according to claim 1, wherein the block of determining the concentration of toner placed on the site to determine the toner concentration of the developer, which acts downward clamping force from the clamping wall when you move the developer from the bottom up is according to the rotation of the mixing element and transportation.

4. Device according to any one of claims 1 to 3, characterized in that
item mixing and transporting further comprises a set of spiral blades on the outer surface of the element in the form of a rotating shaft, with
blade reverse transport is provided in the form of protrusions in the area of the element in the form of a rotating shaft between the spiral blades.

5. Device according to any one of claims 1 to 3, characterized in that the mixing element and transportation is a screw element that contains the element in the form of a rotating shaft supporting rotation and spiral blade spiral shape protruding on the outer surface of the element in the form of a rotating shaft, and the blade element to move the developer in the normal direction according to the rotation of the element in the form of a rotating shaft or move the developer in the same direction as the direction of movement through the spiral blade in the area opposite to the pressure wall, in the entire region in the direction of the axis of rotation of the element in the form of a rotating shaft.

6. The device according to claim 4, characterized in that the blade reverse transport or the blade element is placed between two opposite surfaces, placed opposite each other in the direction of the axis of rotation of the spiral blade, between at least one of the two protovale is asih surfaces and blade return shipments or blade element includes a gap.

7. The device according to claim 5, characterized in that the blade reverse transport or the blade element is placed between two opposite surfaces, placed opposite each other in the direction of the axis of rotation of the spiral blade, between at least one of two opposite surfaces and an edge of the reverse conveyance or element of the blade is provided the gap.

8. The device according to claim 4, characterized in that the amount of projection of the blade return shipments or blade element in a normal direction from the outer surface of the element in the form of a rotating shaft is set greater than the amount of projection of the spiral blade in the normal direction of the element in the form of a rotating shaft.

9. The device according to claim 1, characterized in that the clamping wall is only part of the whole area in the conveying direction of the developer unit of transport of the developer.

10. Developing device containing a device for transporting developer containing toner and carrier, and an element of retention of the developer transported by the transport system developer in the area in front of the element holding the latent image according to the moving surface of the element holding the developer while holding the developer on a continuously moving surface, and exhibiting with rite image formed on the element holding the latent image, the device transporting the developer uses the device transporting the developer according to any one of claims 1 to 9.

11. The processing unit in the device for the formation of images containing the element holding the latent image, a developing device for the manifestation of the latent image on the element holding the latent image, and a transfer unit visual image shown on the element holding the image on the transfer element, and the processing unit contains at least an element holding a latent image and a developing device in a common holding element in the form of a single block and secured with the possibility of removal on the main body of the device image, the developing device used with the device according to claim 10.

12. Device for the formation of images containing
element holding the latent image,
processor unit for the manifestation of the latent image on the block holding the latent image, thus
as a developing device used with the device according to claim 10.

13. Device for the formation of images by item 12, characterized in that it further contains
the power supply of the toner in the developing device is STV, and
the control unit is designed for repeated collection of results of detection by the detection unit concentration of toner retrieve only results with values higher than the average in the detection result, and the drive control unit supply toner based on the extraction result.



 

Same patents:

FIELD: mechanics.

SUBSTANCE: proposed cartridge to feed developer can be mounted in the developer intake device and removed therefrom and comprises the following elements, i.e. compartment to contain developer therein with a hole to feed it therefrom, a flexible element arranged in the aforesaid compartment around the said hole to seal the transition area between the developer feed cartridge and developer intake device. It also includes a film placed on the compartment containing developer and enveloping aforesaid flexible sealing element. The said film can be removed from the outlet hole. The proposed device incorporates also a gate to open and close the said outlet hole, that can slide over the flexible element on opening the latter by removing the aforesaid film.

EFFECT: cartridge to feed developer that requires minor force to open and close its gate and comprises sealing film ruling out leakage of dye-coupling developer.

5 cl, 6 dwg

FIELD: physics; optics.

SUBSTANCE: image generating device comprises a rotatable latent image carrier, which is configurable to carry latent image, a spreading blade, a cleaning blade for remaining toner removal from the cleaned area of latent image, and a lubricating means. The latter comprises a lubricating element located on the downside of the cleaning blade as regards to direction of rotation of latent image carrier. It lubricates respective area of latent image carrier. Cleaning area and lubricating area overlap and are, in fact, one and the same area of latent image carrier. A brush roller is used as a lubricating element. Lubricant is a lubricating rod; image generating device comprises an apparatus, which rotates the brush roller so that the latter removes the rod-shaped lubricant and applies it onto latent image carrier. Cleaning blade is located at the upper side of lubricating means in the direction of rotation of image carrier. Spreading blade is located at the downside; brush roller width and longitudinal spreading blade width relationship being as follows: brush roller width ≤ spreading blade width.

EFFECT: reduced friction factor of photoconductive material, reduced dimensions, reduced lubricant consumption.

30 cl, 18 dwg

FIELD: physics.

SUBSTANCE: image forming device has a first image forming mode to form an image on an image transfer element using developer in a first fixed state of image forming, and a second image forming mode to form an image on an image transfer element using developer in a second state of image forming, which is different from said first fixed state of image forming and is predefined so as to ensure developer consumption in the second image forming mode lower than that in the first image forming mode for the same image. At that, said device includes a storage to store information on used capacity of the image transfer element, an image processing controller to process the image on the basis of size of concentrated pixel area in the image information when the second image forming mode is set, and a control means to change the second image forming state in the second image forming mode depending on results of the processing carried out by the image processing controller and on the information stored in the storage. The cartridge contains an image transfer element. The storage includes the first storing area to store information on used capacity of the image transfer element, which is used in combination with the image information depending on results of the processing carried out by the image processing controller in order to change the second state of image forming. At that, the information for changing the second state of image forming is the information, which is used in the second mode of image forming, but not in the first mode of image forming.

EFFECT: provision of image forming device and cartridge capable to reduce consumption of developer while keeping stable image peculiarities regardless used capacity of image transfer element; provision of storage device to be installed on cartridge.

31 cl, 32 dwg

FIELD: engineering of image forming devices.

SUBSTANCE: image forming device has first image forming mode for forming an image on image-carrying element by using a developer under given condition of image forming and second image forming mode for forming an image on an image-carrying element by using a developer under second condition of image forming, which is different from the first given image-forming condition and is set in such a manner, that developer flow value in second image forming mode is less than flow value in first image forming mode. Device also contains: storage means meant for storing information for setting second image-forming condition, corresponding to the set of levels of usability value of image-carrying element, differentiation means for differentiating an image subject to forming and control means, meant for setting second image forming condition in second image forming mode depending on the result of differentiation, produced by means of differentiation and usability value of image-carrying element and information, stored in the storage means. The cartridge contains information processing means, intended for processing information on the image, which should be formed, an image-carrying element, storage means, meant for storing information in the cartridge, and having first storage area for storage of information, used in conjunction with image information, for setting second image-forming condition depending on the set of levels of usability value of image-carrying element in second image forming mode.

EFFECT: creation of device for forming an image and of a cartridge, which allow to reduce amount of used developer, and to preserve stable quality of image independently from usability value of image-carrying element.

4 cl, 38 dwg

FIELD: engineering of image forming devices.

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4 cl, 38 dwg

FIELD: physics.

SUBSTANCE: image forming device has a first image forming mode to form an image on an image transfer element using developer in a first fixed state of image forming, and a second image forming mode to form an image on an image transfer element using developer in a second state of image forming, which is different from said first fixed state of image forming and is predefined so as to ensure developer consumption in the second image forming mode lower than that in the first image forming mode for the same image. At that, said device includes a storage to store information on used capacity of the image transfer element, an image processing controller to process the image on the basis of size of concentrated pixel area in the image information when the second image forming mode is set, and a control means to change the second image forming state in the second image forming mode depending on results of the processing carried out by the image processing controller and on the information stored in the storage. The cartridge contains an image transfer element. The storage includes the first storing area to store information on used capacity of the image transfer element, which is used in combination with the image information depending on results of the processing carried out by the image processing controller in order to change the second state of image forming. At that, the information for changing the second state of image forming is the information, which is used in the second mode of image forming, but not in the first mode of image forming.

EFFECT: provision of image forming device and cartridge capable to reduce consumption of developer while keeping stable image peculiarities regardless used capacity of image transfer element; provision of storage device to be installed on cartridge.

31 cl, 32 dwg

FIELD: physics; optics.

SUBSTANCE: image generating device comprises a rotatable latent image carrier, which is configurable to carry latent image, a spreading blade, a cleaning blade for remaining toner removal from the cleaned area of latent image, and a lubricating means. The latter comprises a lubricating element located on the downside of the cleaning blade as regards to direction of rotation of latent image carrier. It lubricates respective area of latent image carrier. Cleaning area and lubricating area overlap and are, in fact, one and the same area of latent image carrier. A brush roller is used as a lubricating element. Lubricant is a lubricating rod; image generating device comprises an apparatus, which rotates the brush roller so that the latter removes the rod-shaped lubricant and applies it onto latent image carrier. Cleaning blade is located at the upper side of lubricating means in the direction of rotation of image carrier. Spreading blade is located at the downside; brush roller width and longitudinal spreading blade width relationship being as follows: brush roller width ≤ spreading blade width.

EFFECT: reduced friction factor of photoconductive material, reduced dimensions, reduced lubricant consumption.

30 cl, 18 dwg

FIELD: mechanics.

SUBSTANCE: proposed cartridge to feed developer can be mounted in the developer intake device and removed therefrom and comprises the following elements, i.e. compartment to contain developer therein with a hole to feed it therefrom, a flexible element arranged in the aforesaid compartment around the said hole to seal the transition area between the developer feed cartridge and developer intake device. It also includes a film placed on the compartment containing developer and enveloping aforesaid flexible sealing element. The said film can be removed from the outlet hole. The proposed device incorporates also a gate to open and close the said outlet hole, that can slide over the flexible element on opening the latter by removing the aforesaid film.

EFFECT: cartridge to feed developer that requires minor force to open and close its gate and comprises sealing film ruling out leakage of dye-coupling developer.

5 cl, 6 dwg

FIELD: physics; image processing.

SUBSTANCE: invention relates to a device for transporting developer for use in an image formation device. Proposed is a device for transporting developer having a developer transportation unit and a unit for detecting toner concentration. There is a clamping wall in part of the entire area of the first transportation compartment in which there is a first screw element. The area lies opposite the bottom wall of the first transportation compartment on the bottom side in the direction of gravity of the first screw element and opposite sidewalls of the first transportation compartment on both transverse sides orthogonal to the direction of the axis of rotation of the first screw element. In this area toner concentration of the transported developer is determined using a toner concentration sensor. The clamping wall comes into contact with developer on the top in the direction of gravity, with the developer moving from the bottom to the top side in the direction of gravity in accordance with rotation of the first screw element and presses the developer down in the direction of gravity.

EFFECT: more accurate toner concentration detection.

13 cl, 48 dwg

FIELD: printing industry.

SUBSTANCE: in development cartridge contact plate of electrode element is arranged with the possibility of contact with contact site of development shift within the limits of projection plane, when slave binding part is projected in the first direction. The first axial line, which is axis of developing roll shaft, and the second axial line, which is axis of inlet toothed wheel, are arranged parallel and equidistantly in fore and aft direction. Part of contact plate is arranged on the second axial line. The first line that connects axis, around which inlet toothed gear rotates, and shaft of developing roll, and the second line that connects contact plate and shaft of developing roll are arranged parallel to each other. Distance between the first axial line and the second axial line is equal to the distance between the first axial line and contact plate.

EFFECT: stable supply of power to shaft of developing roll, even when motive force is sent directly from master binging part of device for images generation to slave binding part of development cartridge.

74 cl, 25 dwg

FIELD: physics.

SUBSTANCE: cartridge for supplying developer is made with possibility of detachable installation into the main unit of the electrophotographic image formation device. The primary colour cartridge includes: an electrophotographic photosensitive drum; a developer roller designed for developing an electrostatic latent image formed on the electrophotographic photosensitive drum, a valve section of the receiving side which moves between the position for allowed reception of developer for opening developer reception holes, a moving section of the receiving side which moves for interrelated movement of the valve section of the receiving side between the position for allowed reception of developer and the position for prohibited reception of the developer. The moving section of the receiving side includes a working section of the receiving side which occupies the working position when the valve section of the receiving side is in the position for allowed reception of the developer, a control element designed for controlling movement of the moving section of the receiving side when the working section of the receiving side is in the working position. The cartridge for supplying developer also includes a developer holding section for the source side, a valve section for the source side which moves between the position for allowed supply of developer for opening holes for feeding the developer and the position for prohibited supply of the developer for closing holes for feeding the developer and a moving section for the source side. The moving section of the source side moves when the cartridge for supplying developer enters the main unit of the device in a position where the primary colour cartridge is installed in the main unit of the device for interrelated movement of the valve section for the source side from the position for prohibited supply of developer to the position for allowed supply of developer as a result of linkage with the working section of the receiving side of the moving section of the receiving side, whose movement is controlled by the control element in a state in which the working section of the receiving side lies in the working position.

EFFECT: design of a cartridge for supplying developer, a primary colour cartridge and an electrophotographic image formation device in which when the cartridge for supplying developer is extracted from the main unit of the device in a position where both the primary colour cartridge and the cartridge for supplying developer are installed in the main unit of the electrophotographic image formation device, loss of developer through holes for feeding the developer or through holes for receiving the developer can be prevented.

40 cl, 28 dwg

FIELD: physics.

SUBSTANCE: proposed is a developer transportation device which has a developer transportation unit and a toner concentration detection unit which can detect concentration of toner in the developer by getting into contact with the developer or a toner concentration sensor or the wall of the developer transportation unit. The average maximum value of the force pressing the developer to the surface of the sensor of the toner concentration detection unit or to the wall of the developer transportation unit ranges from 9.8×15 N/m2 to 9.8×100 N/m2. Proposed also is an image processing unit which has a latent image holding unit and a developing device which has a developer transportation device and a developer holding unit; an image formation device which has a latent image holding unit and a developing device.

EFFECT: more accurate detection of toner concentration.

8 cl, 26 dwg

FIELD: physics.

SUBSTANCE: developing apparatus is detachably mounted in the housing of an image formation device. The memory device has terminals passing through the rear side of the developing apparatus. The memory device is placed closer to the power reception unit formed on one side of the developing apparatus than to the actuating force reception unit formed on the other side of the developing apparatus.

EFFECT: prevention of damage to the memory device and bad connection between terminals of the memory device and the main housing of the image formation device due to the improved installation position of the memory device, and the image formation device fitted with such a development apparatus.

24 cl, 5 dwg

FIELD: physics, photography.

SUBSTANCE: invention relates to an image forming device and specifically to configuration of a developer unit of an image forming device. The developer cartridge has case with an attachment section which receives the developer cartridge in order to fill the developer cartridge case with an amount of developer equal to that consumed through the developer cartridge case and an element which forms the cover which closes the opening of the attachment section when the cartridge for the developer is not fitted into the developer cartridge. The element which forms the cover has a part for collecting the remaining developer. The developer unit has a developer cartridge which includes a developer supply unit which contains developer, and an attachment section with an opening facing the surface of the wall on one side of the developer cartridge and a cartridge for the developer which is inserted into the attachment section in order to feed the developer into the developer supply unit.

EFFECT: possibility of filling high-quality developer.

22 cl, 7 dwg

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