Developer transportation device, developing device, processing unit and image formation device

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

 

The technical field to which the invention relates.

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

The level of technology

Traditional processing device transports the developer transported by the transport element with stirring, such as a screw element, and is retained on the surface of the block holding the developer, such as showing the sleeve, to the field, converted to the unit holding the latent image in accordance with movement of the surface of the block holding the developer. Then, the toner included in the developer is transferred onto the latent image formed in the block holding the latent image so that the latent image is manifested in the form of a toner image. After developing the latent image remaining developer is returned to the transport element with stirring in a developing device in accordance with the movement of the surface of the block holding the developer. Then, because the developer is transported by the transport element with stirring, the toner concentration of the developer is detected by the detection unit concentration of the toner. Based on the result of detection of the developer again for the within each group the appropriate amount of toner, and then fed back to the unit holding of the developer.

Sometimes the amount of toner included in the developer varies due to fluctuations in environmental conditions and/or the amount of electric charge on the toner. As a result, the result of the detection by the detection unit concentration of toner varies, even though the concentration of toner has not changed, resulting in erroneous detection. Erroneous detection can be prevented by pressing the developer tightly in position detection, where the detection unit concentration detects toner concentration of the toner, so as to have the amount of toner corresponding to the toner concentration. For example, according to the technology disclosed in Laid patent application (Japan) number H06-308833, in the graph in figure 10, through pressure of 30 g/cm2toner under a pressure of 9.8×300 N/m2and more, the result of detection by a sensor permeability as a unit of detection of the toner concentration can be maintained constant regardless of the amount of charge of toner.

The invention

According to the aspect of the present invention provide a device of transportation of the developer, which includes the 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 when paramesh is of the developer by rotation of the transport element with stirring; and the power detecting the concentration of toner is made with the possibility to detect the concentration of toner in the developer by contacting the developer, transported to the inside of the unit transporting the developer, or the developer in the direction of the wall block transport of the developer. The average maximum values of the pressing force of the developer transported in the transport of the developer by means of the transport element with stirring, at every one rotation of the transport element with stirring in respect of the unit detecting the concentration of toner or average maximum values of the pressing force of the developer for each one rotation of the transport element with stirring over a part of the wall facing the unit detecting the concentration of toner is in the range from 9.8×15 N/m2to 9.8×100 N/m2.

According to another aspect of the present invention, provided with the device, including the device transporting the developer made with the possibility of conveying a developer containing toner and carrier; and a unit holding the developer made with the possibility to transport the developer transported by the transportation device of the developer in the area rotated in the direction of the unit holding with ryogo image, in accordance with the movement of its surface by holding the developer on its own endlessly roaming the surface, and to manifest the latent image recorded by the unit holding the latent image. Device for the transportation of the developer is above the device transporting the developer.

According to another aspect of the present invention, a processing unit, which is entirely attached to the main body of the device forming an image, comprising the block holding the latent image made with the possibility to record the latent image, a developing device which has a capability to show the hidden image is fixed to the unit holding the latent image, and a transfer unit, configured to transfer the visualized image is shown in the block holding the latent image on the transfer element. At least the block holding the latent image and a developing device are fixed as one unit in a common block holding processing unit and the device forming the image. Processing device is the above-described developing device.

According to one another aspect of the present invention, is provided by the device is formirovaniya images includes block holding a latent image made with the possibility to record the latent image; and a developing device which has a capability to show the hidden image is fixed to the unit holding the latent image. Processing device is the above-described developing device.

Brief description of drawings

Figure 1 is a schematic view of a copier in accordance with the embodiment of the present invention;

Figure 2 is a partial enlarged diagram to explain the internal structure of the printer unit in the copy machine shown in figure 1;

Figure 3 is an enlarged view of the processing units for yellow (Y) and cyan (C) colors in the intermediate of the conveyor belt shown in figure 2;

Figure 4 is a top view of the optical sensors and the intermediate transfer belt shown in figure 2;

Figure 5 is a block diagram of the copier shown in Fig 1;

6 is a block diagram of the sequence control method for an explanation of the adjustment process parameters, which is performed through the control unit, shown in figure 5;

Fig.7 is an enlarged fragmentary top view of the pattern for detecting tones Y-concentration and the intermediate transfer belt;

Fig is a graph, illustrating the relationship between the amount of adhered toner and capacity;

Fig.9 is a graph for explanation of data of a straight line shown on the graph the relationship between the amount of adhered toner and the reference potential of the latent image;

Figure 10 illustrates an example of the contents of the table control potentials;

11 is a perspective view in parts processing device Y-color, shown in figure 3;

Fig is a top view of the parts of the processor device Y-color, shown at 11, when viewed from above;

Fig is a graph illustrating the relationship between the bulk density and the time of mixing at slow speed in the developer;

Fig is an enlarged schematic representation of the toner particles in the default state;

Fig is an enlarged schematic representation of the toner particles in the developer, which is idle without stirring for 30 minutes.

Fig is a graph illustrating the relationship between the output voltage (volts) of the sensor detecting the concentration of toner and time of mixing at slow speed (minutes);

Fig is a graph illustrating the relationship between the output voltage of the sensor detecting the concentration of toner concentration of the toner;

Fig is an enlarged schematic representation of the device is Ista transportation K-developer developing device of the K-color printer unit;

Fig is an enlarged schematic representation of the device transport K-developer, in which a wall is provided between the sensor detecting the concentration of K and K toner-developer in the first conveying chamber;

Fig is an enlarged schematic representation of the device transport K-developer included in the testing device;

Fig is an enlarged schematic representation of the device transport K-developer, in which the first screw element includes a plate;

Fig is an enlarged vertical side view of the first coil element;

Fig is an enlarged schematic representation of the device transport K-developer, which provides a dome-shaped element;

Fig is a graph illustrating the relationship between the pressing force, elapsed time and the output voltage from the sensor detecting the concentration of toner;

Fig is a graph illustrating the relationship between the detected value of the toner concentration and force of the pressing; and

Fig is a top view of the parts of the device transport K-developer, when viewed from above, which is included in the copy machine according to the second example.

The preferred embodiment of the invention

The inventors have discovered when Prov is Denia experiments what in the actual device the sensor permeability is not always detect such output characteristics, as shown in the graph, illustrated in figure 10 is Laid patent application (Japan) room 6-308833. In particular, in the developing device described in Laid patent application (Japan) room 6-308833, the developer is transported in the direction of the axis of rotation caused by the rotation of the screw element, as an element of transportation with stirring, included in the unit transporting the developer. Then, the toner concentration of the transported developer is detected by the detection unit concentration of the toner is fixed on the bottom wall of the block transport of the developer. In the lower side of the position detection of the concentration of the toner unit detecting the concentration of toner in the conveying direction of the developer on the inner wall of the unit transporting the developer made with rough edges. Therefore, the transport speed of the developer is slowed down in part of the inner wall, roughly trimmed, so that the developer is pressed in the direction of transporting the developer in the position detection of the concentration of toner accommodated in the upper side part of the inner wall in the direction of transport of the developer. However, according to the experiment carried out by the author of the mi of the present invention, in the configuration of the developing device described above, the pressure applied in the direction of transport of the developer, not looks well correlated with the result of detection by the detection unit concentration of the toner comprising the sensor constant.

The inventors have performed additional experiments and found the reason why the correlation between the pressure applied to the developer in the conveying direction of the developer, and the result of detection by the detection unit, the toner concentration does not lead to the preferred outcome. A certain degree of clearance is provided between the wall of the unit transporting the developer, which includes a screw element, and a spiral blade of the screw element. Find the range of the distance detection unit concentration of toner that is attached to the wall of transporting developer, relatively short, so that the detection unit concentration of the toner cannot detect the toner concentration of the developer in the spiral blade is placed relatively far from the power detecting the concentration of toner. Unit detecting the concentration of toner can detect the toner concentration of the developer in the gap, placed near the sensor. Therefore, the developer in the clearance should be prize is sufficient. 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 applied to the developer contained in the spiral blade of the screw element. Even if the developer contained in the spiral blade, sufficiently pressed, the pressing force may not reach the developer in the gap outside of the spiral blade. This is the reason why the correlation between the pressure applied to the developer in the conveying direction of the developer, and the result of detection by the detection unit, the toner concentration does not lead to the preferred outcome.

In addition, the authors of the present invention found that there is a problem in the configuration, use the transport element with stirring, such as a screw member that transports the developer in the direction of the axis of rotation with its own rotation. Namely, as long as the developer is not pressed against the surface of the permeability sensor or the bottom wall of the storage unit of the developer, which is placed between the developer and the sensor permeability through sufficient pressure in accordance with the rotation of the transport element with stirring, the developer cannot sufficiently be mixed near the sensor Pronichev is I. Therefore, the toner concentration of the developer remaining near the sensor permeability for a long time, always detected, so that the change in the toner concentration of the developer cannot be detected immediately.

In accordance with the above situation, the purpose of the present invention is to provide a device of transportation of the developer, allowing preventing the occurrence of erroneous detection of the toner concentration due to variations in volume of the toner and rapid detection of changes in the concentration of toner, and also processing device, the processing unit and the processing unit of the image that includes the device transporting the developer.

Further detail exemplary embodiments of the present invention with reference to the accompanying drawings.

Figure 1 is a schematic view of a copier in accordance with the embodiment of the present invention. The copier includes unit 1 of the printer device 200 paper, a scanner 300, the tool 400 automatic document feeder (hereinafter ADF). Unit 1 of the printer forms an image on the sheet of paper P. the Device 200 paper office supplies paper P in the unit 1 of the printer. The scanner 300 scans the surface of the document (the original). ADF 400 automatic is automatically feeds the document into the scanner 300.

In the scanner 300, the document (not shown)placed on the glass window 301 document is scanned by the reciprocating motion of the first block 303 scanning, comprising a light source to illuminate the document, mirror, etc. and the second unit 304 scan, which includes a set of reflecting mirrors. Radiation scanning emitted from the second block 304 scan is focused on the surface of the imaging sensor 306 reading, which is located in front of the lens 305 of image formation by lenses 305 imaging. Then the focused light scan is read as the image signal by a sensor 306 are read.

On one side of the housing unit 1 of the printer tray 2 feed paper manually, which office paper P, which must be filed in the case, is placed manually. On the other side of the housing includes a tray 3 receive copies, in which office paper P with the generated image issued from the housing is folded stack.

Figure 2 is a partial enlarged diagram to explain the internal structure of the unit 1 of the printer. In the case of unit 1 of the printer is a block 50 of the transfer, in which a loop of the intermediate transfer belt 51 as a unit transfer tensioned by many the tense is different rollers. The intermediate transfer belt 51 is made of a material having a small tensile, such as polyimide resin, deposited carbon powder, for regulating electrical resistance. The intermediate transfer belt 51 rotates continuously in a clockwise direction in accordance with rotation of the leading roller 52 by means of tension by means of a drive roller 52, which is driven to rotate clockwise in the drawing by a drive unit (not shown), the pressure roller 53 of the secondary transfer driving roller 54 and the four rollers 55Y, 55C, 55M, and 55K primary transfer. Incidentally, the additional characters "Y", "C", "M" and "K"is assigned to the rollers 55 of the primary transfer means "yellow", "blue", "purple" and "black" color, respectively. The same can be said about the additional characters "Y", "C", "M" and "K", assigned to other elements.

The intermediate transfer belt 51 is sharply bent in the parts where the driving roller 52, a pressure roller 53 of the secondary transfer and the drive roller 54 pull the intermediate conveyor belt 51, and thereby has an inverted triangular shape, the base of which faces upward in the vertical direction. Stretched the upper part of the intermediate transfer belt 51, corresponding to the base prewarn is the triangular passes in a horizontal direction. Four units 10Y, 10C, 10M and 10K processing aligned horizontally stretched on the upper part of the intermediate transfer belt 51 along the direction of stretching the tight top.

As shown in figure 1, the optical recording unit 60 is placed over the four units 10Y, 10C, 10M and 10K processing. On the basis of the image data in the document scanned by the scanner 300, the optical recording unit 60 is activated to emit four recording light beam through the four semiconductor lasers (not shown)controlled by the control unit of the laser (not shown). Then the photoreceptors 11Y, 11C, 11M, and 11K in the form of drums as blocks holding the latent image for units 10Y, 10C, 10M and 10K processing respectively scanned by the recording light beams L in the dark, so that electrostatic latent images for the colors Y, C, M and K, respectively, are recorded on the surfaces of the photoreceptors 11Y, 11C, 11M, and 11K.

According to the present invention uses an optical recording unit 60, allowing optical scanning so that the laser beam emitted from a semiconductor laser is deflected by a polygonal mirror (not shown), and rejected the laser beam is reflected n the object, which must be scanned by the reflecting mirror (not shown) or by means of an optical lens. Alternatively, optical scanning can be performed through the use of matrix LED (LEDs).

Figure 3 is an enlarged view of the units 10Y and 10C processing and the intermediate transfer belt 51. Unit 10Y processing includes a charging element 12Y, bit device 13Y, the device 14Y cleaning drum, developing device 20Y as a processing unit, the sensor 49Y potential, etc. placed around the photoreceptor 11Y in the form of a drum and held in the body as a total unit holding as well as a removable manner is fixed to the printer unit as one unit in an integrated manner.

The charging element 12Y is an element of the roller type, which is supported rotatably through a bearing (not shown)in contact with the photoreceptor 11Y. The charging bias voltage is applied to the charging element 12Y through block feed bias voltage (not shown), so that the charging element 12Y rotates, having contact with the photoreceptor 11Y. As a result, the surface of the photoreceptor 11Y is uniformly charged, for example, to the same polarity as the polarity of charge of the Y toner. Instead of such a charging element 12Y also can use the VAT charger with scorotron, allowing for uniform charging of the photoreceptor 11Y without contact with the photoreceptor 11Y.

Developing device 20Y, in which a developer containing a magnetic carrier (not shown) and a non-magnetic Y-toner (not shown), is contained in the casing 21Y, includes a device 22Y transportation of the developer and the developing unit 23Y. In the developing unit 23Y part of the external surface of the developing sleeve 24Y as block holding the developer, the surface of which is continuously moved by initiating rotation by a drive unit (not shown)accessible through a hole provided on the casing 21Y. Hence, the area of manifestation is formed between the photoreceptor 11Y and the developing sleeve 24Y, which are facing each other by maintaining a predetermined interval.

Inside the developing sleeve 24Y, made of a nonmagnetic hollow tubular element, so that a magnetic roller (not shown), includes a set of magnetic poles aligned in the circumferential direction, is attached to the developing sleeve 24Y so as not to move in accordance with movement of the developing sleeve 24Y. Developing sleeve 24Y vycerpanie Y-developer of the device 22Y transportation of the developer so that the developing sleeve 24Y is driven so as to rotate with also is the repression of the Y developer in the device 22Y transportation of the developer on the surface due to the action of the magnetic force on the magnetic roller. Then Y-developer, transported to the processing area in accordance with the rotation of the developing sleeve 24Y, is 0.9 mm doctor blade gap is formed between the scraper-blade 25Y and the surface of the sleeve. The tip of the scraper-blade 25Y facing the surface of the developing sleeve 24Y by maintaining a predetermined gap. At this time, the thickness of the layer on the sleeve is controlled to be 0.9 mm or less. Further, when the Y-developer is transported to the developing area facing the photoreceptor 11Y, in accordance with the rotation of the developing sleeve 24Y, chain formation occurs on the sleeve due to the magnetic force of the developing pole (not shown) of the magnetic roller, so that a magnetic brush is formed on it.

Developing bias voltage having, for example, 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 developing the field neprology material, which causes the Y toner to electrostatically move from the area with no image on the side of the sleeve acts between the surface of the developing sleeve 24Y and the area with no image (uniformly charged area, i.e. the background area) of the photoreceptor 11Y. In addition, developing the potential of causing the focus of the Y-toner electrostatically move from the side of the sleeve to the electrostatic latent image, acts between the surface of the developing sleeve 24Y and the electrostatic latent image formed on the photodetector 11Y. Y-toner included in the Y-developer is transferred onto the electrostatic latent image by the developing potential, so that the electrostatic latent image on the photoreceptor 11Y is manifested in the image of the Y toner.

Y-the developer that has passed through the developing region in accordance with the rotation of the developing sleeve 24Y, falls under the influence of a magnetic field repulsion generated between the magnetic poles of repulsive included in a magnetic roller (not shown), and then moved back out of the developing sleeve 24Y inside device 22Y transportation of the developer.

The device 22Y transportation of the developer includes a first screw element 26Y, the second screw element 32Y, a partition provided between the first and second coil element, the sensor 45Y detect the concentration of Y-toner comprising a sensor permeability, etc., the First transport chamber, which contains the first screw element 26Y, and the second transport chamber, which contains the second screw element 32Y, acting as a unit transporting the developer, separated by partitions. However, in areas where both end the each of the screw elements in the axis direction are opposed to each other, the first and second transport chambers communicated with each other through a hole (not shown).

Each of the first and second screw element 26Y and 32Y, as a transport element with stirring, includes an element rotatable shaft in the form of a rod, both ends of which are supported rotatably by bearings (not shown) and a spiral blade provided spirally protruding manner on the outer surface of the element rotating shaft. The Y-developer is transported in the direction of the axis of rotation by means of the spiral blade, which is provided so as to rotate by a drive unit (not shown).

In the first transport chamber, which contains the first screw element 26Y, Y-developer is transported from the front side to the rear side in the direction perpendicular to the drawing sheet, because the first screw element 26Y is driven into rotation. Then, when the Y-developer is transported near the end of the casing 21Y on the rear side of the Y-developer is fed to the second transport chamber through a hole (not shown)provided on the partition.

In the upper side of the second transport chamber, which contains the second screw element 32Y, formed by the developing unit 23Y. The second transport chamber and processing the unit 23Y communicated with each other over the entire area of the part, where the second transport chamber and the processing unit 23Y oppose each other. Therefore, the second screw element 32Y and the developing sleeve 24Y, placed at an angle upward from the second screw element 32Y, facing each other while keeping a parallel manner. In the second transport chamber Y-developer is transported from the rear side to the front side in the direction perpendicular to the drawing sheet, since the second screw element 32Y is driven into rotation. During transportation of the Y-developer around the second screw element 32Y in the direction of rotation icecaves through developing sleeve 24Y arbitrarily or Y-developer after completion of the manifestations of going with the developing sleeve 24Y arbitrarily. Then Y is the developer transported at the end of the second transport chamber in the front side of the drawing, is returned to the first transport chamber through a hole (not shown)provided in the partition.

The sensor 45Y detect the concentration of Y-toner as a unit detecting the concentration of toner comprising a permeability sensor, is attached to the bottom wall of the first transport chamber. The toner concentration of the Y developer conveyed by the first screw element 26Y, it is found from below by a sensor 45Y detection of concentration is the radio Y-toner, and outputs the voltage corresponding to the result of detection. On the basis of the output voltage from the sensor 45Y detect the concentration of Y-toner control unit (not shown) triggers the device to re-fill Y-toner (not shown), if you want to re-fill the required amount of the Y toner in the first transport chamber. Therefore, the toner concentration of the Y-developer, which is reduced due to manifestations, is restored.

The image Y-toner formed on the photoreceptor 11Y, primarily transferred onto the intermediate conveyor belt 51 by pressing the primary transfer for Y-color, which is described below. On the surface of the photoreceptor 11Y after treatment of the primary image transfer of the Y toner sticks residual toner transfer, which is not transferred primarily onto the intermediate conveyor belt 51.

The device 14Y cleaning of drums supports the blade 15Y cleaning, which is made, for example, polyurethane rubber and the like, cantilever method. From the free end device 14Y cleaning of drums in contact with the surface of the photoreceptor 11Y. Side brush-tip brush roller 16Y also has contact with the photoreceptor 11Y. The brush roller 16Y includes an element rotatable shaft, which is driven into rotation is by means of the drive unit (not shown), and a large number of conductive towering setae, which are placed on the outer surface of the element rotating shaft in the position of standing. Residual toner transfer describeda from the surface of the photoreceptor 11Y through blade 15Y cleaning and the brush roller 16Y. The cleaning bias voltage is applied to the brush roller 16Y through metal roller 17Y with an electric field having contact with the brush roller 16Y. The tip of the scraper 18Y pressed against the roller 17Y with the electric field. After the residual toner transfer, which soskreb with photoreceptor 11Y through blade 15Y cleaning, and brush roller 16Y pass through the brush roller 16Y and roller 17Y with the electric field, the residual toner transfer advanced describeda with roller 17Y with an electric field by means of a scraper 18Y and then fall into the collecting screw 19Y. Further, the residual toner transfer projects from the body as a collecting screw 19Y is driven into rotation and returns back inside the device 22Y transportation of the developer through the unit transportation reuse of toner (not shown).

The surface of the photoreceptor 11Y, with which the residual toner transfer is cleared through the device 14Y cleaning of drums, is discharged through a discharge device 13Y, including the discharge of the second lamp and the like, and again uniformly charged by the charging element 12Y.

The potential of the region without images of the photoreceptor 11Y after passing through the optical recording position of the recording light beam L is detected by a sensor 49Y potential, and the result of detection is output to the control unit (not shown).

The photoreceptor 11Y, having a diameter of 60 mm, is driven into rotation at 282 mm/s linear velocity. Developing sleeve 24Y, having a diameter of 25 mm, is driven into rotation at 564 mm/s linear velocity. The amount of charge of toner included in the developer, which shall be delivered to the processing region is set in the range of from about -10 to 30 µc/year Development gap, which is the gap between the photoreceptor 11Y and the developing sleeve 24Y, is set in the range of 0.5 to 0.3 mm, the thickness of the photosensitive layer of the photoreceptor 11Y is set to 30 μm. The diameter of the electron spot of the recording light beam L on the photoreceptor 11Y is set to 50×60 μm, and the power of the light beam is set approximately equal to 0.47 mW. Uniformly charged potential of the photoreceptor 11Y is set to, for example, -700 V, and the potential of the electrostatic latent image is set to -120 C. the Voltage of the developing bias is set to, for example, -470 In and 350 In processing capacity.

Unit 10Y processing detail ojanen above, but other units 10C, 10M and 10K processing have the same configuration as the configuration of the unit 10Y processing, except for the color of toner to use.

As shown in figure 2, each of the photoreceptors 11Y, 11C, 11M, and 11K, respectively, in units 10Y, 10C, 10M and 10K handle rotates by contact with a stretched upper surface of the intermediate transfer belt 51, which moves continuously in a clockwise direction, and thereby generates the pressing of the primary transfer for the colors Y, C, M or K. On the rear side from the nip of the primary transfer for the colors Y, C, M, and K the rollers 55Y, 55C, 55M, and 55K primary transfer have contact with the rear surface of the intermediate transfer belt 51. The bias voltage of the primary transfer, the polarity of which is opposite to the charging polarity of toner is applied to each of the rollers 55Y, 55C, 55M, and 55K primary transfer through unit supply bias voltage (not shown). By applying a bias voltage to the primary transfer electric field of the primary transfer, which causes the toner to electrostatically move from the photoreceptor to the side of the tape, is formed on each of the many places down the primary transfer for the colors Y, C, M and K. When toner images for colors Y, C, M, and K, which are formed on the photoreceptor is x 11Y, 11C, 11M, and 11K, respectively, arrive at the designated pressure of the primary transfer for the colors Y, C, M, and K in accordance with the rotation of the photoreceptors 11Y, 11C, 11M, and 11K, toner images are sequentially overlapped and primarily transferred onto the intermediate conveyor belt 51 through the action of the electric field of the primary transfer and pressure. Therefore, four-color overlapped toner image (hereinafter referred to as "four-color toner image) formed on the front surface (surface of the outer circular contour) of the intermediate transfer belt 51. Alternatively, a conductive brush, to which is applied a bias voltage of the primary transfer, contactless charger scorotron, etc. can be used instead of rollers 55Y, 55C, 55M, and 55K primary transfer.

In the right side of the unit 10K processing by the drawing unit 61 of the optical sensor is placed so as to oppose the front surface of the intermediate transfer belt 51 while maintaining a predetermined gap between them. Block 61 of the optical sensors includes, as shown in figure 4, the sensor 62R detection position of the rear side, the sensor 63Y detecting density of the image sensor 63C of the density detection image sensor 62C discovery centre is Inoi position, the sensor 63M detecting density of the image sensor 63K detecting density of the image and the sensor 62F detection position of the front side that are aligned across the width of the intermediate transfer belt 51. Each sensor includes a reflective photosensor. Light emitted from a light emitting element (not shown), is reflected on the front surface of the intermediate transfer belt 51 or the toner image formed on the tape, and the amount of reflected light detected by the light-receiving element (not shown). On the basis of the output voltage from each sensor to the control unit (not shown) can detect the position of the toner image formed on the intermediate transport belt 51, or the density of the toner image (the amount of adhering toner on the unit square).

As shown in figure 2, the roller 56 of the secondary transfer placed under the intermediate transfer belt 51. The roller 56 and the secondary transfer is driven counterclockwise in the drawing by a drive unit (not shown) through contact with the front surface of the intermediate transfer belt 51 and thereby forms the pressing of the secondary transfer. On the back of the seat clamp secondary transfer is electrically grounded to the pressure roller whiringa transfer causes the rotation of the intermediate conveyor belt 51.

The bias voltage of the secondary transfer, the polarity of which is opposite to the charging polarity of toner is applied to the roller 56 and the secondary transfer through unit supply bias voltage (not shown). By applying bias voltage to the secondary transfer electric field for the secondary transfer is formed between the roller 56 and the secondary transfer and electrically 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 pressing the secondary transfer in accordance with the continuous movement of the intermediate transfer belt 51.

As shown in figure 1, the device 200 paper includes many sets of cassettes 201 paper feed roller 202 paper, a pair of separator rollers 203, a pair of rollers 205 transportation of paper, etc. Cassette 201 paper contains office paper P. the Roller 202 paper office supplies paper P contained in the cassette 201 paper feed from cassette. A pair of separator rollers 203 divides the supplied office paper P on separate sheets. A pair of rollers 205 transportation paper transports separated office paper P along the path 204 output. The device 200 of the paper, as shown in the drawing, the size is moved directly under the unit 1 of the printer. Path 204 output device 200 paper reported by 70 of the paper feed unit 1 of the printer, so that the copy paper P drawn from the cassette 201 of the paper feed device 200 paper is transported in the path 70 of the paper feed unit 1, the printer via path 204 output.

The pair of registration rollers 71 is placed near the end of the path 70 of the paper feed unit 1 of the printer. Office paper P placed between the registration rollers 71, served in place of pressing the secondary transfer at a time synchronized with the four-color toner image formed on the intermediate transport belt 51. In pressing the secondary transfer four-color toner image formed on the intermediate transport belt 51, and a second at a time is transferred to the office paper P by the action of the electric field of the secondary transfer and pressure seat clamp. Once again a portable four-color toner image is combined with white office paper P and thereby forms a full color image. Office paper P, on which the formed full-color image outputted from the place down the secondary transfer, and down from the intermediate transfer belt 51.

In the left side of the seat clamp secondary transfer on the drawing should be what is the block 75 of the conveyor belt, in which a contour tape 76 transportation of the paper is stretched through a set of pulleys and continuously moves counterclockwise in the drawing. Office paper P, when separated from the intermediate transfer belt 51, served on a stretched upper surface of the belt 76 transport paper and transported to the fixing device 80.

Office paper P transported inside the fixing device 80, is held by a retaining clip formed by a heat roller 81 and pressure roller 82. The heat roller 81 includes a heat source such as halogen lamp (not shown). Pressure roller 82 is pressed against the heat roller 81. While full-color image is fixed on the paper P by applying pressure and heat, office paper P is transported to the inside of the fixing device 80.

A small amount of residual toner of secondary transferring that are not transferred to office paper P adheres to the surface of the intermediate transfer belt 51 after office paper P has passed through the pressing of the secondary transfer. The residual toner on the secondary transfer is removed from the tape through the device 57 cleaning tape in contact with the front surface of the intermediate transfer belt 51.

To the to shown in figure 1, cross-device 85 is placed under the fixing device 80. When office paper P is released from the locking device 80, is transported to the position of the switch the way of transport, where the transport path of paper P is switched by means of the oscillating switching prong 86, office paper P is transported to either side of the pair of rollers 87 eject the paper, or to the side cross-device 85, depending on the position of the termination swing switching prong 86. When the copy paper P is transported by the rollers 87 eject paper, office paper P is removed from the apparatus and placed the stack in the tray 3 receive copies.

On the other hand, when the copy paper P is transported to cross-device 85, office paper P is turned over on the other side due to cross transportation performed by the cross-device 85, and transported again to the registration roller 71. Then office paper P is again supplied to the pressing of the secondary transfer, and a full color image is formed on the other side of the office paper P.

When office paper P manually fed from tray 2 feed paper manually, provided on the side surface of the housing unit 1 printer, office paper P is transported to the registration rollers 71 p the tool roller 72 paper manual and a pair of rollers 73 split manually. The registration rollers 71 may be grounded or may be applied bias voltage, to remove paper powder of office paper P.

In the case of manufacturing copies of the original document by means of a copier according to the present variant implementation, the first document is placed in the tray 401 of the original documents in the ADF 400. Alternatively, the ADF 400 is opened and the document can be placed on the glass window 301 of the scanner 300, and then the ADF 400 is closed to hold the document. When the document is put in the tray 401 of the original documents in the ADF 400, when pressed the START button (not shown), the document is served on glass 301 of the window display. Then, the scanner 300 is initiated for scanning the first scanning unit 303 and the second scanning unit 304 start reading and scanning of the document. Almost at the same time, the block 50 transfer and units 10Y, 10C, 10M and 10K processing begin to operate in the operation mode. As office paper P starts to be output from the device 200 paper. When used office paper P, which is not put in the cassette 201 paper displays office paper P, put in tray 2 feed paper manually.

Figure 5 is a block diagram of part of the electric circuit of the copying apparatus according to the present variant implementation. As shown in the drawing, copying apt the rat includes a control unit 500, which controls each device. The control unit 500 includes a CPU (CPU CPU) 501, a ROM is a permanent storage device) 503 and RAM (RAM - random access memory) 502. The CPU 501 performs calculations or management of each unit. The ROM 503 stores fixed data such as a computer program in advance. RAM 502 acts as a workspace in which every data is saved with the possibility of rewriting. ROM RAM 503 and 502 are connected to the CPU 501 via the bus. The ROM 503 stores a data table of concentration-conversion, showing the relationship between the output voltage of each sensor 63Y, 63C, 63M, and 63K detecting density of the image (see figure 4) in the above block 61 of the optical sensors and the density of the image corresponding to the output voltage.

Unit 1 of the printer device 200 paper, scanner ADF 300 and 400 are connected with the control unit 500. In the drawing, although only the sensors and the optical recording unit 60 is listed as devices included in block 1 printer for convenience, other devices (for example, the transfer unit and the processing units) is controlled by the control unit 500. The output signal from each sensor unit 1 of the printer is transmitted to the control unit 500.

6 is a block diagram of the operational sequence of the method for the German control flow of the adjustment process parameters, performed by the control unit 500. The process of adjustment of the parameters is performed in a predefined time, for example, when the copy machine is activated, or based on a predefined number of copies (in the case of continuous printing, in each interval between printing processes), or with a pre-defined time intervals. In the case shown in Fig.6 shows the processing sequence of the adjustment process parameters that are performed when the copy machine is started. When the adjustment process parameters starts, first, to distinguish between the time when the power of the copier is switched on, from the time when an error occurs, the surface temperature of the heat roller in the fixing device 80 (hereinafter referred to as "temperature fixing") is detected as a condition for the implementation process. Is determined whether the temperature of the fixing 100°C. If the temperature of the fixing exceeds 100°C (NO at step S1), determines that the copier is not included, so that the processing flow is terminated.

If the temperature of the fixing does not exceed 100°C (YES at step S1), check the sensor potential is performed (step S2). When checking the gauge potential of each surface potential of the photoreceptors 11Y, 11C, 11M, and 11K, which ednor the bottom charged when a predefined condition, detected by each of sensors 49Y, 49C, 49M, and 49K potential. Then adjusts Vsg for block 61 of the optical sensors (step S3). When the Vsg adjustment for each of the sensors 62R, 62C, 62F, 63Y, 63C, 63M, and 63K) the amount of light emitted from the light emitting element is adjusted so that the output voltage (Vsg) of the light-emitting element that detects light reflecting in the field without images, the intermediate transfer belt 51 can be maintained constant. At steps S2 and S3 potential verification and adjustment of the Vsg are executed in parallel for each color.

Upon completion of the adjustment Vsg is determined, are there any errors in the steps S2 and S3, i.e. during the inspection sensors capacity and Vsg adjustment (step S4). If an error occurs (YES at step S4), the error code corresponding to the error is set (step S18), and then the flow ends. If no error occurs (NO at step S4), and determines if there is a way to automatically adjust the parameters (step S5). Meanwhile, the processes at steps S3 and S4 are performed regardless of the correction method parameters.

If the method of automatic adjustment of the parameters are not set (i.e., the parameter is set at a fixed value) (NO in step S5), the error code is set, and then the flow ends. On the other side is s, if the method of automatic adjustment of parameters is selected (YES at step S5), the processes at steps S6-S16, which are explained below, are performed.

At step S6 seven sets of fragmented toner patterns consisting of multiple reference toner powder images, as shown in figure 4, are formed on the front surface of the intermediate transfer belt 51. These fragmented toner patterns are formed and aligned in the width direction of the intermediate transfer belt 51, so that they could be found in any of the seven sensors 62R, 62C, 62F, 63Y, 63C, 63M, and 63K)included in the block 61 of the optical sensors. The seven types of sets fragmentary toner templates in a broad sense are divided into two types; one is for tone detection concentration, and the other to detect the offset.

The fragmented pattern to detect the tone of concentration consists of a set of contour of the reference toner image (reference toner images for each of the colors Y, C, M and K)having distinct from each other, the density of images. Fragmented templates for detection of tones concentrations for colors Y, C, M, and K (PpY, PpC, PpM and PpK) are formed separately and are detected by sensors 63Y, 63C, 63M, and 63K detection of image density, respectively. When considering the fragmented pattern PpY to find the Oia tone Y-concentration as example fragmentary template PpY includes, as shown in Fig.7, the first reference image PpY1 Y-toner, the second reference image PpY2 Y-toner,..., and n-th reference image PpYn Y-toner, aligned in the direction of movement of the tape (in the direction of the arrow shown in the drawing) while maintaining a predetermined distance G from each other. Although the density of the reference image Y-toner is different from each other, the shape and position of each reference image Y toner on the intermediate transport belt 51 is identical to one another. The reference image Y-toner has a rectangular shape, a width direction which is along the width direction of the strip and the longitudinal direction of which is along the direction of movement of the tape. The reference image Y-toner rectangular shape has a width W1 in 15 mm and the length L1 20 mm, the Distance G between the reference image Y-toner is 10 mm, the Distance between fragmented templates with different color from each other, in the direction of the width of the band is 5 mm

Each of the reference toner images in fragmented patterns to detect tones concentrations (PpY, PpC, PpM and PpK) is formed so that the toner image formed in each of the photoreceptors (11Y, 11C, 11M, and 11K) units (10Y, 10C, 10M and 10K) processing, are transferred onto the intermediate conveyor belt 51. When each soborny toner images passes directly under the sensor (63Y, 63C, 63M, and 63K) detection of image density, respectively, in accordance with the continuous movement of the intermediate transfer belt 51, the light emitted from the sensor is reflected by the surface of each of the reference toner image. The amount of reflected light is correlated with the density of the image of each of the reference toner image. The control unit 500 stores the output voltage of the sensor in relation to the reference toner image as Vpi (i=1 to N) in the RAM 502 through each color (step S8). On the basis of the output voltage from each sensor and data tables of concentration-transform, pre-stored in the ROM 503, determines the density of each reference toner image (the amount of adhering toner on the unit square), and the result of the determination is stored in the RAM 502 (step S9). Before each fragmented pattern for detecting tones concentrations appears on each photoreceptor, the potential of each of the reference latent image as a predecessor of the reference toner image is detected by the potential sensor, and the detection output is continuously stored in the RAM 502 (step S7).

After the amount of adhered toner in respect of each reference toner image is defined, is provided corresponding to sweat ncial manifestations of each developing device (step S10). In particular, for example, the relationship between the potential of each of the reference latent image obtained at the step S7, and the amount of adhering toner is obtained in step S9 shown 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 each latent image), and the Y-axis indicates the number of adhered toner per unit area (mg/cm2). As described above, the reflection photosensor is used as each sensor unit 61 of the optical sensors. As shown in Fig, the output voltage of each sensor is saturated when the amount of adhering toner excessively increases in relation to the reference toner image. Therefore, if the amount of adhering toner is calculated directly on the basis of the output voltage of the sensor of the reference toner image having a relatively large amount of adhering toner, it causes an error. Therefore, as shown in the graph on figure 9, from a variety of combinations of data constituting the reference potential of the latent image and the amount of adhered toner in relation to the reference toner image, a combination of data corresponding part of the straight line shown on the graph the relationship between the reference potential of the latent image and count the amount of adhering toner, selected. Then the method of least squares is applied to the data corresponding parts, and thereby obtained the approximation straight line characteristics of display. Then processing capacity for each color is obtained on the basis of the equation (E) approximation by a straight line which is obtained for each color. In the copy machine according to the present variant of implementation, the type of mirror reflection of the reflection photosensor is used, but is not limited to this. Alternatively, the type of diffuse reflection photosensor reflection can be used.

For calculations using the method of least squares, the following equations are used:

When it is assumed that the equation (E) approximation by a straight line which is obtained based on the output value of each potential sensor for each color (the potential of each of the reference latent image for each color) and the amount of adhered toner (image density) in respect of each toner image for each color, it is Y=A1xX+B1, the coefficients A1 and B1 can be specified as follows:

In addition, the correlation coefficient R of the equation (E) approximation of the straight line can be specified as follows:

Every five data Xn capacity, which are obtained in the processes up to step S9 on the basis of the potential of each of the reference latent image by the color and the amount of adhered toner, and every five data Yn the number of adhered toner after image formation for each color in the processes up to step S9, selected in numeric order, are arranged in pairs as follows:

(X1-X5, Y1-Y5)

(X2-X6, Y2-Y6)

(X3-X7, Y3-Y7)

(X4-X8, Y4-Y8)

(X5-X9, Y5-Y9)

(X6-X10, Y6-Y10)

Further approximation is calculated on a straight line in accordance with the above equations (1)-(8), and also calculated the correlation coefficient R. As a result, the following six pairs of equations of the approximation straight line and the correlation coefficient (9)-(14) are obtained:

Received six pairs of any of the equations, approximation by a straight line, which are arranged in pairs with the maximum correlation coefficient of the coefficients R11-R16 correlation is selected as the equation (E) approximation on the nternet line.

Using equation (E) approximation by a straight line, as shown in Fig.9, the number of X, when the number of Y specifies the desired maximum number of adhered toner Mmax, i.e., the amount of development potential Vmax is calculated. Each potential VB developer bias voltage of each developing device for each color and the corresponding potential VL of the latent image (the potential of the exposed portion)corresponding to the potential VB developer bias voltage, obtained by the following equations (15) and (16):

The relationship between VB and VL can be expressed by equation coefficient (E) of the approximation straight line. Therefore, equation (16) can be expressed as follows:

The relationship between the potential VD of the background part, which is the potential of the photoreceptor before the exposure, and the potential VB developer bias voltage, which is obtained by means of X-coordinates of VK (voltage, when the developing unit starts the manifestation, which is the intersection of the equation of a straight line, as shown in Fig.9, ie:

for the X-axis and the experimentally obtained surplus voltage Vα emulsification using follow the equation:

Therefore, the relationship between Vmax, VD, VB, and VL is given by equations (16) and (19). When Vmax is referred to as the reference value, the relationship between Vmax and each voltage (VD, VB, and VL) obtained by an experiment, etc. in advance and is expressed through a table, shown in figure 10. Table stored in the ROM 503 in the quality table management capacity.

Then the greatest approximation Vmax to Vmax, calculated by means of each color is selected from a table control potentials, and each of the control voltages (potentials) VB, VD and VL corresponding to Vmax, is set as the target potential (step S11).

After that, the power of the laser emission of a semiconductor laser of the optical recording unit 60 is controlled so as to be the maximum intensity of radiation, through a scheme 510 management account for each color, and the output value is removed from the potential sensor, thereby detecting the residual potential of the photoreceptor (step S12). When the residual potential is not equal to zero, the target potentials VB, VD and VL, which is set at the step S11, respectively, are offset by the potential corresponding to the residual capacity to be specified as the target potential.

Is then defined, there l is any errors on the steps S5-S13 (step S14). If the error occurs even in one single color (YES at step S14), even when other flowers errors are controlled, the fluctuation of image density increases, and thus the subsequent processes are completed to no avail. Consequently, the error code (step S18), and then the sequence of the processing flow is terminated. In this case, conditions for the formation of the image is not modified, and the image must be formed under the same conditions as last time until the next adjustment process parameters will not be implemented successfully.

If it is determined that no error occurs (NO at step S14), the circuit power source (not shown) is adjusted so that each potential VD of the background of each photoreceptor can reach the target potential parallel to each other for each color. Further, the power of the laser emission of the semiconductor laser is controlled through a control unit, a laser (not shown), so that the surface potential of the photoreceptor VL can reach the target potential. In addition, each processing device, the power supply is regulated so that each potential VB developer bias voltage can reach the target potential (step S15).

Then determine if any error occurred in the step S15 (step S1). If no error occurs (NO at step S16), after adjustment of the offset, which is explained next, the sequence of processing ends. On the other hand, if an error occurs (YES at step S16), the error code is set, and then the sequence of processing ends.

The fragmented pattern for detection bias, as shown in figure 4, includes three fragmentary pattern, i.e. fragmented template PcR for detection of displacement in the rear side, which is formed near one end of the intermediate transfer belt 51 in the width direction, the fragmented pattern PcC for detecting displacement in the centre, which is formed in the center of the intermediate transfer belt 51 in the width direction, and the fragmented pattern PcF for detecting displacement in the front side, which is formed near another end of the intermediate transfer belt 51 in the width direction. Each of fragmentary patterns for detecting displacement includes a set of reference toner images aligned in the direction of movement of the tape. The reference toner image, which is included in each of the three fragmented patterns for detecting displacement include the reference toner images for colors Y, C, M and K. If the offset does not occur in each photoreceptor or in the each optical exposure system in all areas of the back, center and front side of the reference toner image by each color are formed by maintaining the same interval and the same position relative to each other. However, if any displacement occurs, the gaps formed between the reference toner images are not permanent or location of the reference toner image is tilted. Therefore, in the process of adjusting the offset (step S17), the deviation between the generated reference image of the toner or the deviation of the position detected on the basis of the time interval between the detection of each reference toner image. Then based on the result of detection of the tilt mirrors of the optical system of the exposure is regulated through the mechanism of the tilt (not shown) or the start time of the exposure is adjusted. As a result, the displacement of each toner image by each color can be reduced.

11 is a perspective view on parts of the developing device 20Y. Fig is a top view of the parts of the developing devices 20Y when viewed from above. As described above, the developing device 20Y includes a developing unit 23Y containing the developing sleeve 24Y and the device 22Y transportation of the developer, which transports the Y-be the ü by mixing Y-developer. The device 22Y transportation of the developer includes a first transport chamber containing the first screw element 26Y as a transport element with stirring, and the second transport chamber containing a second screw element 32Y as a transport element with stirring. The first screw element 26Y includes an element 27Y rotating shaft, both of which end in the axis direction is supported rotatably through bearings, respectively, and a spiral blade 28Y provided spirally protruding manner on the outer surface of the element 27Y rotating shaft. The second screw element 32Y includes an element 33Y rotating shaft, both of which end in the axis direction is supported rotatably through bearings, respectively, and a spiral blade 34Y provided spirally protruding manner on the outer surface of the element 33Y rotating shaft.

The first screw element 26Y in the first transport chamber as a unit of transport of the developer is surrounded by walls of the housing. Both sides of the first coil element 26Y in the direction of the axis surrounded by a plate 21Y-1 rear side plate 21Y-2 front side of the enclosure. From other on both sides of the first coil element 26Y in the direction perpendicular the m axis direction, 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 maintaining a predetermined distance from the first coil element 26Y. On the other hand partition 21Y-5 as a side wall that separates the first and second transport chambers, goes in the direction of the axis of rotation of the first screw element 26Y while maintaining a predetermined distance from the first coil element 26Y.

The second screw element 32Y in the second transport chamber as a unit of transport of the developer is surrounded by walls of the housing. Both sides of the second coil element 32Y in the direction of the axis surrounded by a plate 21Y-1 rear side plate 21Y-2 front side of the enclosure. Of the other two sides of the second coil element 32Y in the direction perpendicular to the axis, one side 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 maintaining a predetermined distance from the second coil element 32Y. On the other hand partition 21Y-5, separating the first and second transport chambers, goes in the direction of the axis of rotation of the second screw element 32Y when registering the predetermined distance from the second coil element 32Y.

The second screw element 32Y, surrounded by walls, conveys the Y developer (not shown)held within the spiral blade 34Y, from the left side to the right side on Fig along the direction of the axis of rotation by means of mixing the Y developer in the direction of rotation, since the second screw element 32Y is driven into rotation. The second screw element 32Y and the developing sleeve 24Y are placed parallel to each other, so that the conveying direction of the Y-developer is also the direction along the direction of the axis of rotation of the developing sleeve 24Y. The second screw element 32Y delivers the Y-developer-axis direction relative to the surface of the developing sleeve 24Y.

The Y-developer transported near side of the right end of the second coil element 32Y in the drawing, enters the first transport chamber through the hole provided in the partition 21Y-5, and is then trapped inside the spiral blade 28Y first screw element 26Y. Then the Y-developer is transported from the right side to the left side in the drawing along the direction of the axis of rotation of the first screw element 26Y through mixing in the direction of rotation, because the first screw element 26Y is driven into rotation.

In the first transport chamber sensor 45Y detect the concentration of Y-toner captures who I am on the bottom wall of the housing, which is part of the region in which the first screw element 26Y surrounded plate 21Y-3 the left side of the enclosure and baffle 21Y-5. The sensor 45Y detect the concentration of Y-toner detects the permeability of the Y developer conveyed along the direction of the axis of rotation by means of the first screw element 26Y below, and outputs a voltage corresponding to the result of detection, the control unit 500. The permeability of the Y developer is correlated with the concentration of Y-Y toner-developer, so I can say that the control unit 500 acquires the concentration of the Y toner on the basis of the output voltage from the sensor 45Y detect the concentration of the Y toner.

In unit 1 of the printer units re-fill Y-, C-, M - and K-toner (not shown) for a single re-fill Y-, C-, M -, and K toner, respectively, are provided in the Y-, C-, M - and K - processor devices. The control unit 500 stores Vtref through each of the Y-, C-, M - and K-colors, which are target values of the output voltage of the sensor 45Y, 45C, 45M, and 45K detect the concentration of Y-, C-, M - and K-toner, in the RAM 502. If the difference between each output voltage of the sensor 45Y, 45C, 45M, and 45K detect the concentration of Y-, C-, M - and K-toner and each target value Vtref for each of the Y-, C-, M - and K-colors exceeds the threshold value, the unit re-fill Y-, C, M - and K-toner is initiated only during the time corresponding to the difference. Therefore, any of the Y-, C-, M - and K-toner is re-filled from the hole re-fill toner (for example, as indicated by "A" on Fig)provided in the upper stream side of the first transport chamber in each of the Y-, C-, M - and K-processor devices in the first transport chamber, so that the concentration of Y-, C-, M - and K-toner in the Y-, C-, M - and K-developers are supported within a certain end range.

The permeability of the developer is well correlated with the bulk density of the developer. Bulk density of the developer varies depending on the conditions of issue of the developer, even if the toner concentration of the developer is kept constant. For example, the developer, which is available without stirring by means of a screw element for a long time in the first transport chamber or the second transport chamber, which allowed to leave to air between particles or carriers of the toner by its own weight, but also causes a reduction in the amount of charge of toner particles, so that the bulk density is gradually increased as the time of the release of the developer passes. Then with the increase of bulk density permeability gradually increases. When will be the ü remains for a relatively long time, the increase in bulk density and saturated permeability. In this saturated state, the distance between the magnetic carriers is reduced in comparison with what is required of the developer in the course of performing image formation (or mixing). Therefore, erroneously detected that the toner concentration decreased compared with the original number.

On the other hand, when the developer in which the increase in bulk density and permeability saturated, because the developer was produced for a long time, mixing by means of the screw element in the first transport chamber or the second transport chamber, the air is penetrated between the toner particles and magnetic carriers, and also increases the amount of frictional charge of the toner particles. Therefore, after the developer is released over a long period of time in the first transport chamber or the second transport chamber when the screw element is rotated, even if the development process is not performed, i.e. the screw element starts mixing at slow speed, as shown in Fig, bulk density decreases rapidly for about three minutes after the beginning of mixing at slow speed. This is because the air penetrates into the developer, and the magnitude of the clutch is on charge of the toner particles increases rapidly. After that, although the rate of decrease of bulk density decreases bulk density slowly decreases the time of stirring in slow speed increases. This is because the magnitude of the frictional charge of the toner particles gradually increases due to the friction of the impurities added to the toner particles. In particular, as shown in Fig, impurities H to increase the fluidity of the toner powder are added to the particle of the toner T. Because impurities H gradually abraded due to mixing in the slow speed of the developer, the friction force between the particles of the toner T is gradually increased. Although only about three minutes elapses since the start of mixing at slow speed, the magnitude of the frictional charge of the toner particles reaches almost saturation. After that, since the friction force between the particles of the toner T gradually increases due to friction impurities H, the amount of frictional charge particles of toner T is slowly increased along with the increase of the friction force. Therefore, even after three or more minutes before mixing in slow speed bulk density of the developer slowly decreases as time passes. Fig illustrates a particle of the toner T in the default state. After 30 minutes since the beginning is remesiana in the slow speed condition of the particles of the toner T is changed, as shown in Fig. Meanwhile, the fluidity and bulk density can be measured through the determination of metal powders by the method of theoretical density-funnel"described in JIS Z 2504:2000.

Thus, as the time of mixing at slow speed passes, the volume density of the developer is slowly reduced over a long period of time. Next, as shown Fig, the permeability of the developer (the output voltage from the sensor detecting the concentration of toner) is gradually reduced, and the detection output of the toner concentration gradually decreases. Even if the toner concentration of the developer immediately after the time of mixing at slow speed and concentration after 30 minutes from the start time constant, a significant difference occurs in the output voltage from the sensor detecting the concentration of toner, as shown in Fig. Hence the erroneous determination of the concentration of toner.

In the developing device described in Laid patent application (Japan) room 6-308833 to prevent such erroneous detection, the entire area of the unit transporting the developer, ensure the pressure of the developer in the area where the sensor detecting the concentration of toner detects that the toner concentration is increased compared to what centrala in another area. However, the pressure indicates the pressure in the conveying direction of the developer (in the direction of the axis of rotation of the screw element). According to the experiment performed by the authors of the present invention, the pressure is not optimally correlated with the frequency of occurrence of erroneous detection.

The reason why the pressure is not optimally correlated with the frequency of occurrence of erroneous detection will be explained below. Fig is an enlarged schematic representation of the device 22K transportation K-processor device. In the drawing the bottom wall 21K-6 of the first conveying chamber containing the first screw element 26K, facing to the lower side of the first screw element 26K in the direction of gravitational force while maintaining a predetermined gap. In addition, the plate 21K-3 the left side of the first conveying chamber is turned to one side, perpendicular to the direction of the axis of rotation of the first screw element 26K, while maintaining a predetermined gap. The separation wall 21K-5 first transport chamber turned to the other side while maintaining a predetermined gap. K-developer 900K records not only inside the spiral blade 28K first screw element 26K, but also in the gap IU the DN of the spiral blade 28K and plate 21K-3 left side, the gap between the outer part of the spiral blade 28K and the bottom wall 21K-6 and the gap between the outer part of the spiral blade 28K and the dividing wall 21K-5. The sensor 45K detection of the concentration of the K-toner is fixed to the case processing device cannot detect the concentration of K-K toner-developer, fixed inside the spiral blade 28K placed relatively far from the sensor 45 to detect the concentration of K-toner, since the detectable range of the distance sensor 45K detection of the concentration of the K-toner is relatively small. The sensor 45K detect the concentration of K toner can detect the concentration of the K-toner K-developer 900K, fixed in the gap between the outer part of the spiral blade 28K and the bottom wall 21K-6. Therefore, the K-developer 900K, fixed in the gap must be sufficiently subjected to pressure; however, the pressure generated in accordance with rotation of the first screw element 26K, mainly acts on the K-developer 900K, fixed inside the spiral blade 28K in the conveying direction of the K-developer 900K (in the direction of the axis of rotation). Even when the K-developer 900K, fixed inside the spiral blade 28K, sufficiently exposed to the pressure in the conveying direction, the K-developer 900K, fixed in the gap, can not all gatica pressure sufficiently. This is the reason why the pressure applied to the developer in the conveying direction, is not optimally correlated with the frequency of occurrence of erroneous detection.

Moreover, the authors of the present invention found that in the configuration shown in the drawing, has the following problem. Namely, the K-developer 900K near the sensor 45K detection of the concentration of the K-toner may not be actively mixed up until the K-developer 900K will not be pressed to the surface of the sensor 45K detection of the concentration of the K-toner by sufficient pressure in accordance with the rotation of the first screw element 26K. Even if the first screw element 26K revolved many times, the same K-developer 900K stagnate near the sensor 45K detection of the concentration of the K-toner over a long period of time. Therefore, the sensor 45K detect concentrations of K toner, continued detection of the concentration of the toner of the same K-developer 900K. Therefore, the charge of the actual concentration of the K-toner K-developer 900K may not be detected quickly.

Therefore, the developer should be tightly pressed on the surface of the detection permeability sensor detecting the concentration of toner by increasing no pressure applied to the developer in the axial direction of the screw (the conveying direction), and the pressure in the direction of rotation of the screw. In case the e, shown in Fig, the surface detection permeability sensor 45K detection of the concentration of the K-toner is configured to have contact with the K-developer 900K inside the first conveying chamber. You can also use the configuration shown in Fig. In the case shown in Fig, the wall of the first transport chamber (in this case, the bottom wall 21K-6 in the drawing) is provided between the K-developer 900K inside the first transport chamber and a sensor 45K detect the concentration of K toner. In this case, the K-developer 900K should be tightly pressed to the wall provided between the K-developer 900K and sensor 45K detection of the concentration of the K-toner, by force of rotation of the first screw element 26K.

Therefore, the authors of the present invention conducted an experiment so that the result of detection by a sensor 45K detect the concentration of K toner was tested by changing the clamping force on the K-developer 900K inside the first conveying chamber in relation to the sensor 45K detect the concentration of K toner. In particular, the first test device having the same configuration as copy machine shown in figure 1, was prepared. The test device is configured in the same manner as shown in Fig, i.e. the bottom with the child 21K-6 of the first conveying chamber is provided between the K-developer 900K inside the first transport chamber and a sensor 45K detection of the concentration of the K-toner so you need to measure the clamping force on the K-developer 900K in relation to the bottom wall 21K-6. Therefore, the device 22K transportation of the developer on the developer device for K-color modified as shown in Fig. A hole is made in the bottom wall 21K-6 first transport chamber, which lies between the K-developer 900K and sensor 45K detect the concentration of K toner. The hole dimensions are almost the same as 50% the dimensions of the plane of the detection coil, contained in the detection unit permeability sensor detecting the concentration of K-toner 45K (6 mm in diameter). Plate 90 receiving circular load, which has dimensions that are slightly smaller than the holes (5.3 mm in diameter)were prepared and attached to the sensor 91 load ultra-low capacitance (LTS500GA: nominal capacity 5N), manufactured by Kyowa Electronic Instruments Co., Ltd. Further, the measuring device is a dynamic tension (DPM-711B: set when LPF=2 kHz) (not shown) electrically connected to the sensor 91 load ultra-low capacitance in order to measure the pressure applied to the plate 90 of the load pick-up. Plate 90 receiving the load attached to the sensor 91 load ultra-low capacitance inserted in a hole made in the bottom wall 21K-6 first transport chamber. Further, for accurate and is the intention of the load plate 90 of the load pick-up sensor 91 load ultra-low capacitance tightly secured to the support block (not shown) to prevent contact plate 90 of the receiving load with the internal wall of the bore. Moreover, in order to prevent leakage of the K-developer 900K in a small gap between the plate 90 receiving the load and the inner wall of the hole, the entire hole is covered with a sheet 92 of the flexible film made of polyvinylidenechloride, polyvinyl chloride, etc. and having a thickness of about 10 μm) inside the first conveying chamber. The sheet 92 of the film has good adhesion and strength, so that the sheet 92 of the film does not tear, even if the sheet 92 of the film gets inside the holes by applying the clamping force to the K-developer 900K. With this configuration, it is possible to measure the clamping force on the K-developer 900K relative to the plate 90 receiving the load in the direction of the arrow B in the drawing. Instead of the sheet 92 of the thin film of the binder composition can be applied up until thin layer of the binder composition has sufficient cohesion and strength required for the measurement (note that the thin layer of the binder composition should prevent the clutch plate 90 of the load pick-up).

To compress the K-developer 900K inside the first conveying camera tightly to the plate 90 of the load pick-up configuration of the first screw element 26K is changed to the configuration shown in Fig, as needed. In the first screw element 26K, shown in Fig, eye element 29K provided on the element 27K rotating shaft t is thus, that eye element 29K is in the area opposing the plate 90 of the load pick-up. Eye element 29K, as shown in Fig, is placed between the blade elements, combined in the axial direction of the spiral blade 28K, and exiting the element 27K rotating shaft extension on the outer surface of the element 27K rotating shaft in the direction of the axis of rotation. As shown in Fig, K-developer 900K held in the spiral blade 28K displaced in the normal direction (in the direction of the arrow C shown in Fig) in accordance with the rotation of the element 27K rotating shaft, so that the K-developer 900K placed between the outer part of the spiral blade 28K and the bottom wall 21K-6 can be tightly against the plate 90 of the load pick-up. Incidentally, the direction of the arrow D shown in Fig, indicates the direction of the force applied to the K-developer, in accordance with the rotation of the spiral blade 28K.

To compress the K-developer 900K inside the first conveying camera more tightly to the plate 90 of the load pick-up, dome-shaped element 39 K, shown in Fig, is provided in the region of the first conveying camera directed towards the plate 90 of the load pick-up, if necessary. The dome-shaped element 39K hung between the left-side plate 21K-3 and the dividing wall 21K-5 included in the first Tr is sortyrovochnuyu camera to close the first transport chamber from above. Curved surface along the curve of the spiral blade 28K formed on the surface of the dome-shaped element 39 K, opposing the first coil element 26K. This configuration of the dome-shaped element 39K presses the K-developer 900K down in the vertical direction due to the contact with the K-developer 900K, which moves upwards in the direction of the gravitational force in accordance with rotation of the rib element 29K, from above in the vertical direction. Therefore, the pressing force of the K-developer 900K relative to the plate 90 receiving the load can be further increased.

Fig is a graph illustrating the relationship between the force of a clamp K-developer 900K relative to the plate 90 receiving the load, which is detected by the test device to device 22K transportation of the developer shown in Fig, and timed. As shown in the drawing, the relationship between the clamping force and the elapsed time indicates a sinusoidal pattern. This is because the force of the K-developer 900K relative to the plate 90 reception load is maximized when the eye element 29K first screw element 26K passes through the region, opposing the plate 90 of the load pick-up, in accordance with the rotation of the first screw ale the NTA 26K. If the combination of the plate 90 of the load pick-up and sensor 91 load ultra-low capacitance replaced the sensor (45K) detecting the concentration of K-toner, as can be seen in the drawing, the relationship between the output voltage from the sensor detecting the concentration of toner and timed specifies a sinusoidal pattern, and the period of the sinusoidal configuration is synchronized with the period of the power clamp. Namely, at a time when the pressing force of the K-developer 900K relative to the plate 90 reception load is maximized, the output voltage of the sensor detecting the concentration of toner is also maximized, so that the toner concentration can be detected accurately.

In a test unit (500) control is defined as follows. Output signals from the sensor 45K detection of the concentration of the K-toner is discretized in the period in twenty or more times greater (at intervals of 4 MS) period of rotation of the first screw element 26K (one period of the sinusoidal pattern shown in Fig), and discretized data sequentially stored in RAM (502). From the discretized data by means of each one period of the first screw element 26K discretized data is retrieved by 10% of the number of discretized data in order of the highest values, and then average discretized data IP is alzueta as the output voltage from the sensor detecting the concentration of toner. Therefore, the sensor output when the K-developer properly pressed against the surface detecting sensor 45K detection of the concentration of the K-toner through each period of the first screw element 26K, is used so that the probability of an erroneous determination can be reduced.

Then the authors present invention conducted an experiment to test the relationship between the concentration of K toner (wt%) K-developer and output voltage (V) from the sensor detecting the concentration of toner. In particular, first prepared the device 22K transportation of the developer, which does not include any rib element (29K)or dome-shaped element (39K), as shown in Fig. Then K is the developer, which is adjusted to have a predetermined concentration of the K-toner by mixing K-toner and magnetic carrier, is placed in the device 22K transportation of the developer. Then K is the developer mixed at slow speed by the rotation of the first screw element 26K or the second screw element 32K. The output voltage from the sensor detecting the concentration of toner within three minutes from the time of the beginning of mixing at slow speed is set as the default output voltage Vts sensor. The reason why the output voltage of the of Attica detecting the concentration of toner in relation to the K-developer after three minutes from the time of mixing in the slow speed is set as the default output voltage Vts sensor, is that, as shown in Fig, after three minutes, a rapid decrease in bulk density of the K-developer practically stops, and K-toner is friction-charged to a sufficient extent. Measurement standard output voltage Vts sensor is performed against each of the three K-developers, the concentration of K toner, which are 6, 8 and 10%, respectively. Further regression analysis of the three K-developers made on the basis of each of the concentrations of the K-toner and standard output voltage Vts sensor, and then the resulting linear regression equation indicating the relationship between the concentration of K toner and the output voltage from the sensor detecting the concentration of toner. Namely, in the K developer after three minutes from the time of mixing in slow speed, the concentration of K toner, and the output voltage from the sensor detecting the concentration of toner indicates the characteristic of the linear regression equation. In the actual device, if K is the developer inside the first conveying chamber indicates the same condition as at the end of three minutes, with a start time of stirring in slow speed, the toner concentration can be accurately measured on the basis of linear regression equations. However, for example, if the image, zootoxin the th image region which is low, constantly displayed, the output voltage from the sensor detecting the concentration of toner is detected lower than the actual values (i.e. the concentration of toner is detected higher than the actual amount) due to the decrease in bulk density of the K-developer, which is caused by excessive agitation. As a result, the concentration of toner K-developer controlled by a smaller amount than an appropriate amount, and, thus, there is a lack of density of the image.

Therefore, the authors of the present invention then performed an experiment to test the relationship between the strength of the clamp K-developer relative to the sensor 45K detect concentrations of K toner, and the detected amount of toner concentration. In particular, in a test device explained above, the pressing force is changed when each of the conditions 1-4. Under condition 1, there are no rib element (29K)or dome-shaped element (39K). Provided 2-eye element is provided, but the dome-shaped element is not provided. When condition 3 is provided and eye element, and a dome-shaped element. Under condition 4 dome-shaped element is provided, as well as eye element provided on the element 27K rotating shaft protruding manner with an inclination to the direction of the axis of rotation, so that the K-developer can transportera Atisa in the opposite direction from the helical blade (28K) (hereinafter eye element is referred to as the "back edge"). Under condition 4 K is the developer that is transported in the opposite direction along the axis of rotation in the field, the opposing plate (90) receiving load, pressed to the plate (90) receiving a load in accordance with the rotation of the rib member by shaking the K-developer, so that the greatest force of the clamp K-developer relative to the plate 90 of the load pick-up can be obtained among all the conditions specified.

When each of the conditions first measured the force. Then after the combination plate (90) receiving the load and sensor (91) load ultra-low capacitance is replaced by a sensor (45K) detecting the concentration of K-toner starts mixing at slow speed. Then measured the output voltage from the sensor detecting the concentration of toner obtained after three minutes and after forty minutes before mixing in slow speed, and get the concentration of toner corresponding to the output voltage, respectively, through the use of linear regression equations. Then it turns out the difference between the toner concentration (concentration difference). This measurement of the difference of the concentration is performed against each of the three K-developers, the concentration of K-toner whom were 6, 8 and 10%, respectively, when each of the services is observed. Then the mean for each condition is defined as a detected value of the toner concentration.

The reason for the difference between the calculated concentration value of the K-toner after three minutes from the time of mixing in slow speed and volume after forty minutes before stirring in the slow speed is set as the detected value of the concentration of toner will be explained below. The decrease in bulk density due to mixing in the slow speed of the developer-facing for a long time, gradually reaches the saturation point. After forty minutes before stirring in the slow speed it reaches about eighty percent of the saturation point. In the actual device, when the image ratio of the image region which is low, is printed continuously, mixing (rotational casting screw element) is performed over a relatively long period of time under this condition, when the amount of toner consumption per unit time due to the manifestation of the relative low, so that it goes into a state close to mixing at slow speed. Therefore, with the increase in continuous printing bulk density of the developer decreases sravnenie the density during steady print which leads to a greater frequency of occurrence of erroneous detection of the toner concentration. However, it is not mixing at slow speed, so that when the toner included in the developer is consumed in the development process, the developer is gradually re-populated with new developer depending on the consumed amount, and thereby the volume density is not reduced to the point of saturation. Even when the image ratio of the image area which is very low, is printed continuously, reducing the bulk density is approximately eighty percent of the saturation point. In other words, when the image ratio of the image region which is low, is printed continuously through the actual device, bulk density gradually decreases; however, the bulk density decreases to a value which is equal to the amount of the developer, which is mixed at slow speed for forty minutes. This is the reason why the difference between the calculated volume concentration of the K-toner after three minutes from the time of mixing in slow speed and volume after forty minutes before stirring in the slow speed is set as the detected value of the toner concentration.

Fig is a graph of illustri the existing relationship between the detected value of the toner concentration and the force of pressing, which was obtained by an experiment. Detected value of the concentration of the toner is preferably supported within 1.5% of weight or less. The reason explained below. In the conventional technology typically uses a toner having an average particle diameter (φ) of about 6.8 microns. In this case, when the toner concentration of the developer exceeds 12% by weight, there are problems such as scattering of toner image with white dots and the adhesion of the carrier. Therefore, it is necessary to control so that the toner concentration was 12% by weight or less. In addition, when the toner concentration falls below 5% by weight, there are problems such as lack of concentration for the solid image and the adhesion of the carrier. Therefore, it is necessary to control so that the toner concentration was 5% by weight or more. In order to reliably control the concentration of toner in the range from 5 to 12% of the weight should be assessed erroneously detected value of the toner concentration. In conventional technology, the maximum erroneously detected value of the toner concentration is usually 3% of the weight. Therefore, the upper limit and the lower limit target controlled concentration of toner, as a rule, are set at 9% of the weight as the upper limit of the target volume and 8% by weight as the lower limit of the spruce volume, assuming the errors in the 3% weight, respectively. However, with the development of high resolution in recent years there is a tendency to use a toner having a smaller particle diameter. If you are using a toner having an average diameter (φ) of the particles of 5.5 μm, when the concentration of toner exceeds 9% by weight, there are problems such as scattering of toner image with white dots and the adhesion of the carrier. In addition, when the toner concentration falls below 5% by weight, there are problems such as lack of concentration for the solid image and the adhesion of the carrier. In this case, when the error is within 3% of the weight of Pets, the upper limit of the target volume becomes equal to 6% of the weight and the lower limit of the target volume becomes equal to 8% of the weight. Therefore, the upper limit of the target volume is less than the lower limit of the target volume, therefore, the toner concentration cannot be controlled properly. This is the reason why the detected value of the concentration of the toner is preferably supported within 1.5% of weight or less. Therefore, even when using a toner having an average particle diameter of 5.5 μm, the upper limit of the target volume is 7.5% by weight and the lower limit of the target volume is 6.5% by weight. Thus, the toner concentration can be controlled properly.

As shown in the graph on Fig, when the force exceed the t 15 kg/m 2(=9,8×15 N/m2)erroneously detected value of the toner concentration can be maintained equal to 1.5% of weight or less. The authors of the present invention confirmed that when the behavior of the K-developer near the sensor 45K detection of the concentration of the K-toner is removed at high speed using a high-sensitivity camera, the mixing of the K-developer near the sensor due to rotation of the first screw element 26K has not been activated under the condition that the pressing force is set to about 10 kg/m2. On the other hand, when the pressing force is set equal to 15 kgf/m2or more, confirmed that the K-developer may be mixed near the sensor due to rotation of the first screw element 26K. As a result, when the pressing force (maximum force clamp on each one rotation of the screw) is set equal to 15 kgf/m2or more, the occurrence of erroneous detection of the concentration of the tones due to fluctuations in the volume of toner can be reduced in comparison with the traditional technology, as well as changes in the concentration of toner can be rapidly identified with active stirring of the developer near the sensor detecting the concentration of toner.

However, the force (maximum force clamp on each one rotation of the screw) must be set equal kg/m 2(=of 9.8×100 N/m2) or less. The reason explained below. The authors of the present invention conducted an additional experiment to test the relationship between the clamping force and the detected concentration of the toner through the gradual increase of the clamping force from 9.8×50 N/m2to 9.8×180 N/m2. Found that when the force exceeds a value of 9.8×100 N/m2erroneously detected value of the concentration of the toner begins to radically increase. This is the reason why the force was maintained equal to 9.8×100 N/m2or less. As a result, it is possible to prevent such a situation that erroneously detected value of the toner concentration to a certain extent was increased due to an excessive increase in the strength of the clamp.

The reason erroneously detected value of the concentration of the toner begins to radically increase, when the pressing force exceeds approximately of 9.8×100 N/m2, explained below. When the pressing force exceeds approximately of 9.8×100 N/m2the pressure applied to the developer under a domed element becomes too high, so the developer located on the exhaust side of dome-shaped element in the conveying direction, can't go under it. Further, the circulating state of the developer is different from the normal, for example, so that the developer crossed the em dome-shaped element. As a result, the developer is not actively mixed near-surface detection sensor detecting the concentration of toner, and thereby increases erroneously detected value. Moreover, when the pressure applied to the developer increases excessively under the dome-shaped element, the rotational movement of the first screw element is blocked due to pressure, and in this case it can cause damage to the unit.

When a straight line on the graph shown in Fig, passes through the horizontal axis, the line segment on the coordinate axis between the horizontal axis and a straight line is approximately at 50 kg/m2. At this time, in theory erroneously detected value of the toner concentration is approximately zero percent of weight. In these experiments, in which the pressing force is set in the range of 50-180 kg/m2(from 9.8×50 to 100 N/m2), under the condition that the pressing force is set equal to or slightly greater 50 kg/m2as the initial value, mistakenly detected value of the concentration of the toner may be about 0% by weight.

In the copy machine according to a variant implementation, the average maximum values of the forces pressing on the developer that is transported inside the first conveying chamber in accordance with the rotation of the first screw member as a unit is transportirovki developer of each of the units 10Y, 10C, 10M and 10K processing, relative to the sensor detecting the concentration of toner in each one rotation or the average of the maximum values of force pressing on the developer in respect of a wall provided between the developer and the sensor detecting the concentration of toner in each one rotation of the screw is set in the range from 9.8×15 N/m2to 9.8×100 N/m2.

The maximum value of the clamping force of the developer relative to the sensor detecting the concentration of toner in each one rotation of the screw, as shown in Fig, the value at each peak of the waveform in the form of mountains occurs periodically at every one rotation of the screw. As for measuring the strength of the clamp, the force of pressure can indicate a much larger value than the actual value, due to the presence of noise; however, much higher values (hereinafter referred to as "local maximum value caused by noise) is not the correct clamping force, so that the local maximum value due to noise should be excluded from the measurement results. Without the use of noise filter of the local maximum value due to noise can be eliminated by different, in General, well-known methods as follows. For example, the force is measured by an electronic low-pass filter, or a few tons of the cheque moving average is applied to the value read by a sensor detecting the concentration of toner, or a value different from the value of the moving average by more than a pre-defined point, is excluded. The sensor detecting the concentration of toner comprising a sensor permeability, there is no harm from exceptions periodic waveform that occur with a high period, which is ten times longer than the period of one rotation of the screw element as noise. The important thing is to take into account the pressure change corresponding to the period of rotation of the mixing element (such as a screw element)located in the area of a surface detection sensor in order to capture the maximum pressure value. Periodic waveform with more than ten times greater period or suddenly appearing (emission) waveform is not associated with the clamping force of the developer transported by the first screw element relative to the sensor detecting the concentration of toner, so that the detection output of the power clamp by a sensor detecting the concentration of toner, even if the sensor detecting the concentration of toner outputs the result. Therefore, the local maximum value of the waveform does not match the maximum force of the clamp relative to the block detect the concentration of toner in each one rotation of the transport element with stirring," according to the present invention.

The average maximum values of the pressing force of each one rotation of the screw is obtained in such a way that the maximum value for each one rotation of the screw is measured for several spins, and calculates the average measured number of maximum values. The measured number is the number of rotations of the screw element in the period in which the developer is circulated from the first transport chamber to the second transport chamber only five times (five laps from the first transport chamber to the second transport chamber). If provided a dome-shaped element, the maximum value may gradually increase after the stirring was started. According to the experiment performed by the authors of the present invention, when the increase is not stopped within the period, the developer was stuck in a dome-shaped element soon after period. On the other hand, when the increase continued in the framework of the period, and maximum values were stable at a certain level, the developer is not stuck in a dome-shaped element. As a result, average and maximum values of the clamping force of the developer for each one rotation of the transport element with stirring," according to the present invention means the average of the maximum values within a period only when Maxim the global magnitude of the force of the clamp are stable within a certain range after as increasing the strength of the clamp is terminated within the period. With regard to the dimension "power clamp"should be used new magnetic media. As for stirring the developer, the mixing at slow speed should be carried out without re-fill toner.

In addition, it is still difficult to obtain the clamping force 9.8×15 N/m2or more, even if the sensor detecting the concentration of toner is placed in the area of the first coil element, which does not provide eye element. However, improved techniques allow to obtain such clamping force. For example, the force can be increased more than usual so that the eye element (29K), shown in Fig, or the opposite edge, as described above, at or beyond the area of the rotating shaft of the first screw element in the direction of the axis of rotation, the area facing the sensor detecting the concentration of toner. When the power is down 9.8×15 N/m2or more cannot be obtained, even if provided by eye element or the opposite edge, adds a dome-shaped element 39 K, shown in Fig. In the copy machine according to a variant implementation is provided and the opposite edge, and a dome-shaped element.

Examples of a copier according to which arianto implementation of the present invention, which is more characteristic configuration is added, explained below. Copiers according to the examples, respectively, have the same configuration as the configuration of a copier according to a variant implementation, unless otherwise specified.

In the copy machine according to the first example uses the unit transporting the developer of each of the units (10Y, 10C, 10M and 10K) processing, allowing assignment of the average maximum values of the power clamp of the developer transported inside the first conveying chamber in accordance with the rotation of the first screw element, for each one rotation of the screw in relation to the sensor detecting the concentration of toner, or the average maximum values of the power clamp of the developer for each one rotation of the screw element against the wall provided between the developer and the sensor detecting the concentration of toner equal to 9.8×25 N/m2or more.

Fig is a top view of the parts of the device 22K transportation K-developer, when viewed from above, which is included in the copy machine according to the second example. Device transporting the developer for other colors have the same configuration as the configuration of the device 22K transportation of the developer. Screw element, such as the first screw element 26K, can experience the ü pressure the developer, conveyed accurately in the conveying direction or in the direction of delivery. In this case, the conveying direction is the same direction as the direction of the axis of rotation of the screw element and the direction of the delivery means, the direction of ejection of the developer issued from the end portion in the output side of the screw element in the conveying direction of the developer. For example, if the screw element is placed in the gap on unbent straight line, the direction of ejection of the developer issued from the end portion of the screw element in the output side, is in the same direction as the direction of the axis of rotation. On the other hand, if the screw element is placed at the front side of the bent portion or the curved part of the frame which is curved or bent in the middle, the direction of ejection of the developer issued from the gap, which contains the screw in a curved portion or a curved portion is a direction along a curved surface or a curved portion or a curved surface, or a curved portion. Screw element can be subjected to pressure developed precisely in these directions.

However, the screw element is difficult to be subjected to the pressure of the developer exactly in the normal direction. Therefore, in the copy machine according to the option on the implementation of the eye element, the opposite edge and the like, is provided in order to increase the clamping force in the normal direction. This is because the sensor detecting the concentration of toner is placed so as to detect the toner concentration of the developer transported in the normal direction.

On the other hand, in the copy machine according to the second example, the sensor 45K detection of the concentration of the K-toner is placed in such a way that the surface of the detection of the toner concentration sensor 45K detection of the concentration of the K-toner is in the direction of the surface perpendicular to the direction of the axis of rotation of the first screw element 26K. Next, the surface of the detection of the toner concentration sensor 45K detection of the concentration of the K-toner (or wall is provided between the surface of the detection of the concentration and K is the developer) is defined to bump into K-developer delivered from the first screw element 26K. More specifically, K is the developer passes from the first transport chamber containing the first screw element 26K, the second transport chamber that contains a second screw element 32K, through the hole provided in the partition 21Y-5. Therefore, the path of transport of the developer is curved in the horizontal direction between the first and second transport chamber. Then, when the path of the tra is spartanovka developer is curved in a horizontal direction, the conveying direction of the K-developer of the first transport chamber is always towards the surface along the direction of the axis of rotation of the first screw element 26K. More specifically, for example, in the present copy machine first screw element 26K is positioned so that the rotation axis is set along the horizontal surface. In this case, the conveying direction of the K-developer of the first transport chamber is always a direction along a horizontal surface. What direction on a horizontal surface, is determined by the curved surface of the curved part. In the copy machine according to the present variant implementation of the curved surface (the surface of the plate 21K-1 rear side) perpendicular to the direction of the axis of rotation of the first screw element 26K, so that the conveying direction of the K-developer twisted at 90 degrees to the horizontal surface. On the other hand, in the copy machine according to the second example, the element 38K regulation of the angle of curvature in the shape of a triangular prism is mounted on the end portion of the first transport chamber on the output side of the transport direction of the developer, and then the angle of curvature to the horizontal surface is set equal to 45 gradusov this case, K is the developer, delivered from the first transport chamber, is directed to natalkivat it on a horizontal surface at 45 degrees relative to the plate 21K-1 back. Therefore, even if the eye element or dome-shaped element is not provided, the K-developer delivered from the first transport chamber, faces and is pressed tightly to the surface of the detection of the toner concentration sensor 45K detection of the concentration of the K-toner (or plate 21K-1 rear side).

Thus, the sensor detecting the concentration of toner is placed so that the surface of the detection of the concentration of the toner is in the direction of the surface perpendicular to the direction of the axis of rotation of the screw element, so that the developer can be held tightly against the surface of the detection of the concentration of toner (or wall provided between the surface of the detection of the concentration of the toner and developer), even if the eye element or dome-shaped element is not provided.

When the surface of the detection of the concentration of the toner is in the direction of the surface perpendicular to the direction of the axis of rotation of the screw element, the bent portion or the curved portion is not necessarily provided on the way of transport of the developer. For example, steps in the direction of the axis of the spiral blade of the screw ele is enta partially enlarged and the sensor detecting the concentration of toner is placed between the blades, the steps are increased so that the developer transported between the blades, can directly face the surface of the detection of the concentration of toner flowing in the direction of the axis of rotation of the sensor detecting the concentration of toner screw element.

Thus, in the copying apparatus of the first example, the average maximum values of the forces pressing on each one rotation of the screw is set equal to 9.8×25 N/m2and more, and thereby erroneously detected value of the toner concentration can be reduced compared with the case installed, less than or equal to 9.8×25 N/m2.

In addition, in the copy machine according to the second example of the first screw element 26K, which transports K-developer in the direction of the axis of rotation by means of mixing K-developer in accordance with the rotation of the spiral blade 28K provided spirally protruding manner on the outer surface of the element 27K rotating shaft support rotation, is used as the transport element with stirring. The sensor 45K detection of the concentration of the K-toner is positioned so that the surface of the detection of the concentration of the toner is in the direction of the surface perpendicular to the direction of the axis of rotation of the first wines of the new element 26K. In this configuration, as described above, the developer may be held tightly against the surface of the detection of the concentration of toner (or wall provided between the surface of the detection of the concentration of the toner and developer), even if the eye element or dome-shaped element is not provided.

In addition, in the copy machine according to a variant implementation, because the eye element or dome-shaped element is provided, the conveying speed of the developer in detecting the concentration of toner, the sensor 45K detect concentrations of K-detects toner concentration of the toner, from the entire area of the first transport chamber as a unit of transport of the developer, is slowed down in comparison with other areas. In this configuration, the bulk density of the developer in the field of detection of the toner concentration is set higher than the density in other areas, so the average maximum values of 9.8×15 N/m2or more can be easily obtained.

In addition, in the copy machine according to a variant implementation, the eye element provided in the first screw element 26K as transport element with stirring, so that the performance of the transportation of the developer in the detection of the concentration of the toner, from all areas and in the direction of the axis of rotation of the rib element, decreases in comparison with other parts. In this configuration, the transport speed of the developer in detecting the concentration of toner can be accurately reduced compared to other areas.

According to the aspect of the present invention, according to the results of experiments performed by the authors of the present invention, when the maximum value of the clamping force of the developer relative to the detection unit concentration of the toner, which has contact with the conveyed developer, or maximum value of the clamping force of the developer relative to the wall provided between the developer and unit detecting the concentration of toner is set equal to 9.8×15 N/m2or more, the developer, subject to detect the concentration of toner, which is part of the developer contained in the unit transporting the developer, may be subjected to sufficient pressure to prevent erroneous detection of the toner concentration. In addition, the developer may be mixed near the unit detecting the concentration of toner in accordance with the rotation of the transport element with stirring. As a result, the occurrence of erroneous detection of the toner concentration due to fluctuations in the volume of toner can be reduced in comparison with the traditional technology, and changed the e to the concentration of the toner can be quickly determined by intensive stirring of the developer near the unit detecting the concentration of toner. If the maximum value is excessively increased, the stirring of the developer near the unit detecting the concentration of toner is contraindicated. However, as found in experiments, specify the maximum value, equal to 9.8×100 N/m2or less active stirring of the developer can be left.

1. Device for transporting developer containing:
the 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 transport element with stirring; and
unit detecting the concentration of toner is made with the possibility to detect the concentration of toner in the developer by contacting the developer or a sensor detecting the concentration of toner or wall unit transporting the developer, which is provided between the developer, transported to the inside of the unit transporting the developer, and a sensor detecting the concentration of toner in which:
the average maximum values of the pressing force of the developer to the surface of the sensor unit detecting the concentration of toner or to the wall of transportation of the developer per every one rotation of the transport element to move, set in the range from 9.8·15 N/m to 9.8·100 N/m2.

2. The device transporting the developer according to claim 1, in which the average maximum value is set equal to 9.8·25 N/m2or more.

3. The device transporting the developer according to claim 1 or 2, in which:
screw element, configured to transport the developer in the direction of the axis of rotation during stirring of the developer due to the rotation of the spiral blade provided on the outer surface of the element rotating shaft, is used as the transport element with stirring, and
unit detecting the concentration of toner is placed in a position in which the surface of the detection of the concentration of the toner is in the direction of the surface perpendicular to the direction of the axis of rotation.

4. The device transporting the developer in one of claims 1 and 2, in which the transport speed of the developer in detecting the concentration of toner where the unit detecting the concentration of toner detects the concentration of toner, which is part of the entire scope of the transportation of the developer, is slowed down in comparison with other areas.

5. The device transporting the developer according to claim 4, which uses the transport element with stirring, the performance of the transportation of the developer in which the part corresponding detection area con is entrale toner, which is part of the whole area of the transport element with stirring in the direction of the axis of rotation, is reduced in comparison with other parts.

6. Developing device containing:
the device transporting the developer made with the possibility of conveying a developer containing toner and carrier; and
the block holding the developer made with the possibility to transport the developer transported by the transportation device of the developer, in the area facing in the direction of the block holding the latent image, in accordance with the movement of its surface by holding the developer on its own endlessly roaming the surface, and to manifest the latent image recorded by the unit holding the latent image, thus
the device transporting the developer according to any one of claims 1 to 5 is used as a device for the transportation of the developer.

7. The block of image processing, which is completely attached to the main body of the device forming an image, comprising the block holding the latent image made with the possibility to record the latent image, a developing device which has a capability to show the latent image recorded in the unit by keeping the of a latent image, and a transfer unit, configured to transfer the visualized image is shown in the block holding the latent image on the transfer element, in which:
at least the block holding the latent image and a developing device are fixed as a single unit in a common block holding processing unit and the device imaging, and
developing device according to claim 6 is used as the developing device.

8. Device imaging, comprising:
the block holding the latent image, made with the ability to hold the latent image; and
processor device, implemented with the opportunity to show the hidden image is fixed to the unit holding the latent image, thus
developing device according to claim 6 is used as the developing device.



 

Same patents:

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: 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; 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: 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.

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: 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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