Device for settling droplets

FIELD: power engineering.

SUBSTANCE: device comprises housing structure that defines the central plane, a number of passages for discharging droplets that pass through the housing structure parallel to the central plane, nozzle for discharging droplets, means for generating sound wave within the passage, and collector that is extended throughout the housing structure parallel to the central plane and perpendicular to the passages. The passages passing through the central plane are shifted perpendicular to the central plane with respect to the adjacent passages. Each nozzle is in communication with the appropriate passage. The collector crosses the passage so that the reflection coefficient of the sound wave of the boundary between each passage and collector is the same for all passages. According to the second version, the device has first group of passages shifted with respect to the central plane in the first direction perpendicular to the central plane, second group of passages shifted with respect to the central plane in the second direction perpendicular to the central plane, and drives. According to the third version, the device has additional means for generation of sound wave and discharging droplet through the nozzle. The collector intersects each passage of the first group whose reflection coefficient differs from that of the second group of passages, first circuit for generating first exciting signal that excite the passages of the first group, and second exciting circuit for generating the second exciting signal that excites the passages of the second group. The first and second group of passages are excited alternatively.

EFFECT: improved design.

21 cl, 21 dwg

 

The present invention relates to droplet deposition device, to the heads for inkjet printing, in particular to the heads for inkjet printing according to the request signal.

Industrial printing is often a key requirement is that the printing performance. Inkjet task increase to the maximum printed area per unit time can be solved in different ways. Noteworthy indicator for the printing performance of all approaches to the solution of this problem is the total amount of ink, filed a separate nozzle per unit of time. Will remain, of course, important to the performance of the printer remained accurate, stable as a page is printed, and when printed from one or from one printed image to another image.

In the known construction formed channels in the mass of the piezoelectric material, and ink droplets are ejected by the impact of sound waves in a channel for ink generated by the deflection of the walls of the channel.

In the patent EPA was proposed to shift the alternating channels for ink. Experiments, however, showed that this bias may lead to changes in the operating characteristics, and in particular to variations in the speed of ejection of ink from the neighboring shifted channels.

According to one object of the invention to offer is but a droplet deposition device, includes Cabinet structure defining a Central plane and in the plane direction of elongation of the channel, many of elongated channels for ejection of droplets extending through the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, and each channel is offset from the Central plane with respect to the adjacent channel, the corresponding nozzle for ejection of droplets that communicates with each channel, activating the means for generating a sound wave in a selected channel and thereby perform ejection of droplets through the corresponding nozzle, the manifold extending through the Cabinet structure parallel to the Central plane and perpendicular to the direction of elongation of the channel, and the collector crosses each channel to determine the profile the end of the channel, while the profile of the end of one channel, essentially, is a mirror image in the Central plane of the profile of the end adjacent the channel so that the reflection coefficient of sound wave boundary between each channel and the reservoir, essentially, is the same for all channels.

The present applicants have determined that the change in reflectivity of the sound wave in devices of offset channels is an important factor in the speed of ejection of the droplets, and the object of this image is to be placed thereby provides the advantages of offset channels with much less if it is a change in velocity of ejection of droplets.

The profile of the end of each channel preferably includes a surface profile that is inclined relative to the direction of elongation of the channel, the angle of inclination of the surface profile for one channel is equal and opposite to the angle of the adjacent channel.

The inclined profile of the end of the channel significantly contributes to the formation of conductive tracks connecting the electrodes in each channel with chains, generating triggering signals. These conductive paths are formed accordingly by depositing a continuous conductive layer and subsequent removal of material by laser.

Another object of the invention is the droplet deposition device, comprising a housing structure that defines a Central plane and in the plane direction of elongation of the channel, many of elongated channels for ejection of droplets extending through the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, the first channel group is offset from the Central plane in a first bias direction perpendicular to the Central plane, and a second group of channels is offset from the Central plane in the second direction of displacement is perpendicular to the Central plane,the corresponding nozzle for ejection of droplets, communicates with each channel drives, including the relevant area of the piezoelectric material with electrodes connected to receive trigger signals, each drive after receiving the triggering signal is for generating a sound wave in a selected channel and thereby to perform ejection of droplets through the corresponding nozzle, the manifold extending through the Cabinet structure parallel to the Central plane and perpendicular to the direction of elongation of the channel, and the collector crosses each channel to determine the profile of the end of the channel of the conductive track extending at least part of the profile of the end of each channel, and these conductive paths transmit trigger signals to the electrodes, while the profile of the end of the channel of the first group, essentially a mirror image in the Central plane of the profile of the end of the channel of the second group, so that the reflection coefficient of sound wave boundary between each channel and the collector is essentially the same for all channels.

The cross section of the collector is preferably symmetrical relative to the Central plane.

Another object of the present invention is the droplet deposition device, comprising a Cabinet structure defining a Central flat the path and in the plane direction of elongation of the channel, many of elongated channels for ejection of droplets extending through the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, the first channel group is offset from the Central plane in a first bias direction perpendicular to the Central plane, and a second group of channels is offset from the Central plane in the second direction of displacement is perpendicular to the Central plane, the corresponding nozzle for ejection of droplets that communicates with each channel, electrically driven means for generating a sound wave in a selected channel and thereby to perform ejection of droplets through the corresponding nozzle, the manifold extending through the Cabinet structure parallel to the Central plane and perpendicular to the direction of elongation of the channel, while the collector crosses each channel of the first channel group having a coefficient of reflection of the sound wave on the collector, which differs from the coefficient of reflection of the sound wave at the collector of the second group of channels, the first electrical triggering circuit for generating the first trigger signal, activating the channels of the first group of channels and a second electrical triggering circuit for generating the second trigger signal, the trigger Kahn is s of the second group of channels, while the first and second groups of channels are activated alternately, and the first trigger signal differs from the second trigger signal to the extent that is necessary to provide the same speed of ejection of droplets from the channel of the first group and the second channel group.

The first trigger signal preferably differs from the second trigger signal at a triggering voltage, rise of the pulse or the pulse duration.

Another object of the present invention is the method of deposition of droplets comprising the operation of creating a Cabinet structure defining a Central plane and in the plane direction of elongation of the channel, multiple elongated channels for ejection of droplets extending through the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, and each channel is offset from the Central plane with respect to adjacent channel corresponding to a nozzle for ejection of droplets connected with each channel, and a manifold extending through the Cabinet structure parallel to the Central axis and perpendicular to the direction of elongation of the channel, while the collector crosses each channel to determine the profile of the end of the channel, generating sound waves in the first channel and thereby comply with the Oia ejection of droplets from the nozzle, generating sound waves in the second channel and thereby perform ejection of droplets from the nozzle, while maintaining the equality of the coefficient of reflection of the sound wave boundary between the first channel and the collector and the reflection coefficient of sound wave boundary between the second channel and the collector.

Another object of the present invention is the use of droplet deposition device, comprising a housing structure that defines a Central plane and in the plane direction of elongation of the channel, many of elongated channels for ejection of droplets extending through the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, the first channel group is offset from the Central plane in a first bias direction perpendicular to the Central plane, and a second group of channels is offset from the Central plane in the second direction of displacement is perpendicular to the Central plane, the corresponding nozzle for ejection of droplets that communicates with each channel, electrically driven means for generating sound waves in the selected channel and perform thereby eject droplets through the corresponding nozzle, the manifold extending through the Cabinet structure parallel to the Central plosko is and perpendicular to the direction of elongation of the channel, when this collector intersects each channel of the first channel group having a coefficient of reflection of the sound wave on the collector, which differs from the coefficient of reflection of the sound wave at the collector of the second group of channels, and the application includes the operations alternately supply the first trigger signal to activate the selected channels of the first group and the second trigger signal to activate the selected channels of the second group, the first trigger signal differs from the second trigger signal to the extent that is necessary to provide the same speed of ejection of droplets from the channel of the first group and the second channel group.

The first trigger signal preferably differs from the second trigger signal at a triggering voltage, rise of the pulse or the pulse duration.

In one embodiment, the present invention provides a droplet deposition device, including the cost of the drive, including many channels formed with a predetermined interval between the channels, and each of these channels has a plot predetermined length d1, and the portion of the said length having a constant depth and a portion of the said length has a variable depth charge nozzle, forming the end wall of the above-mentioned channels of the actuator and manutech channels cover, in which the said channels drive tools include modifications to reflect sound waves.

In another embodiment, the present invention provides a droplet deposition device, including the cost of the drive, including many channels formed with a predetermined interval between the channels, and each of these channels has a predetermined length d1, and the portion of the said length having a constant depth and a portion of the said length has a variable depth, cost of cover, including many channels formed with a predetermined interval between the channels and having a length d2 of the channel, where d2 is less than d1, and at least one of the channels of the drive fits into at least one of mentioned channels cover charge nozzle, forming the end wall of the above-mentioned channels of the actuator and the said channels of the cover, in which at least some of these channels drive tools include modifications to reflect the sound waves, so that the reflection of the sound wave channel emissions generated from channel drive in combination with the channel cover essentially identical to the reflection of the sound wave channel emissions generated from channel drive, which is not aligned with the channel of the cover.

Funds modifications to reflect sound waves preferably include a groove, Posterous is across the length of the channels of the actuator, moreover, the groove is preferably filled with an ejectable fluid medium or acoustically transparent solid, such as an epoxy compound or other adhesive.

The present invention will be further described only as an example with reference to the following drawings, in which:

Figure 1 - schematic view of the inkjet printing device according to one embodiment of the present invention,

Figure 2 is a section in enlarged scale through a portion of the inkjet printing device shown in figure 1,

3, 4 and 5 are schematic views illustrating the relative location of key components,

6 is a block diagram illustrating the circuit run,

7, 8 and 9 - diagram of signals illustrating an alternative operation of the circuits run on 6,

Figure 10 is a view in isometric with a pulling device, inkjet print-on request signal according to another embodiment of the present invention,

11 is a diagram illustrating the arrangement of the channels and nozzles in a printhead according to figure 10,

Fig - lateral cross-section through the printhead in figure 10,

Fig is a top view of the printhead in figure 10,

Fig and 15 are diagrams illustrating various devices shifted channels

Fig and 17 are diagrams illustrating alternative and complementary forms of the invention,

Fig, 19, 20 and 21 are diagrams illustrious the fabrication, shown in Fig and 17.

Referring first to figure 1, it can be seen that the print head 10 jet ink according to the request signal includes a Cabinet structure 12, the triggering device 14 of the integrated circuit and printed circuit Board 16. Cabinet structure 12 is formed with multiple parallel channels 18 for ink, which extend in the direction shown by the arrow 20. The 22 nozzles (see figure 2) attached to the front edge of the Cabinet structure 12 and defines for each channel 18 of the nozzle 24 to eject ink. Each channel 18 extends from the corresponding nozzle 24 to the manifold 26 for the supply or removal of the ink that passes through the Cabinet structure 12 in the direction perpendicular to the direction 20, as indicated.

As more clearly shown in figure 2, the Cabinet structure 12 is formed from upper and lower layers 30 and 32. In its simplest form, each of these layers 30, 32 is formed of polarized piezoelectric material such as piezoelectric transducer (PET). Might be useful for each of these two layers can be formed of a layered material comprising a probe on the border between the layers 30, 32 with the respective additional substrate, such as a substrate made of alumina or glass, the channels 18 for ink formed, for example, by sawing layers 30 and 32. As bleached shown in figure 5 and 6, adjacent channels 18 are displaced with respect to the Central plane, formed in this example, the boundary between the layers 30 and 32. Thus, the first group of channels (which in one example, channels with odd number) extends a relatively short distance into the layer 30 and at a relatively large distance in the layer 32. The second group of channels (which in this example, channels with an even number) extends at a relatively large distance in the layer 30 and a relatively short distance into the layer 32. Figure 2 shows the solid lines 18 location relative to the Central plane of the channels with an even number, then as the location of the channels with an odd number shown by the dashed lines 18'.

The manifold 26 to the ink formed aligned and additional grooves 34 and 36, cut or otherwise formed in the respective layers 32 and 30, each of the grooves 34 and 36 has a front edge 34, 36A, inclined at an angle of approximately 45 degrees to the direction 20, flat base 34, 36V and the rear section 34, 36C, similarly inclined at an angle of approximately 45 degrees.

Wall 50 of the piezoelectric material (see, for example, figure 5) formed between adjacent channels 18, and, as is well known in the prior art, these walls of piezo-electric material performs the function of the actuators, in order to put into effect the substance of the ejection of ink droplets through the nozzle 24 of the corresponding channel 18. More specifically, the electrode 52 formed on the inner walls of the channels at or near the plane of intersection of the layers 30 and 32, allows the application of a field across oppositely polarized regions of the piezoelectric material, causing the deformation of the walls in a Chevron formation. [See, for example, patent documents EPA 703 and EPA 590.]

Submission of the respective triggering signals to the electrodes 52 a sound wave is forced to propagate along the selected channel for the ink, which results in the ejection of droplets of ink. The behavior of this sound wave in the channel for the ink on the end of the channel defined by the Board nozzles 22 and the end of the channel defined by the manifold 26 is critical for proper and reliable performance of the printhead. Two groups of channels (i.e., in this case channels with an odd number of channels with an even number) are in their respective offsets of various intersections with collector 26 and, accordingly, the different profiles of the end of the channel. Figure 3 schematically shows a channel with an even number with its corresponding profile 54 of the end of the channel. Figure 4 similarly shows the channel with an odd number with its corresponding profile 56 of the end of the channel. On both figures 3 and 4 also show the line 58 indicating the plane of intersection of the layers 30 and 32 or Central the second plane. It should be noted, however, that the profiles of the end of the channel of the two groups of channels are mirror images of each other in this Central plane. This is a very important result, namely, that the sound reflection factor of two groups of channels in the manifold 26 to the ink, in essence, is identical across all channels, despite the various offsets.

Thus to provide identity reflection of the sound wave on the collector across all channels is a key factor in maintaining a uniform rate of release.

The inclined surface 34A, which constitute a relatively large part of the profile of the end of the channel group with an odd number of channels, and a relatively small part of the profile of the end of the channel group with an even number of channels are most useful to their purpose. They provide tracks 60, which extend from the electrodes 50 to the mounting pads 62 wired connections for connection to an integrated circuit using a simple and reliable way. Thus, in one example, the tracks may be formed by deposition of the metal material layer 32, followed by processing with a laser to remove the metal material, and maintaining the tracks, closely spaced, but securely isolated from one another. Electrolysis metallizer what I Nickel is the preferred technique for forming a continuous layer. It should be clear that the reservoir for the ink, which was represented by a vertical surface facing the channel for ink, not simply will provide an opportunity for such techniques.

In the device, which cannot be achieved with sufficient accuracy the identity of the reflection of sound waves, it will be possible, as shown in Fig.6, to provide two groups of channels, triggered by different signals to compensate for any change in the reflection of the sound wave and thereby to provide a uniform speed of ejection of the droplets. Thus, provided by the circuit 80 starts with many connections 82 with the corresponding mounting pads 62 wired connections, with two generators 82 and 84 of the start signal. The trigger 86 is used to alternately supply the outputs of the two generators of the start signal to the circuit 80 starts.

The trigger circuit is configured to sequentially activate two groups of channels, and the trigger 86 is designed for synchronous interconnection of these two signals. Two signals may differ on a number of parameters. They may differ, for example, voltage start, and it is shown in Fig.7, where one signal is shown as a solid line 88, and the other dashed line. The alternative shown in Fig, where the signals differ in growth momentum or growth momentum and p is the population. In the device shown in Fig.9, signals different in pulse width.

With reference to figure 10, 11 and 12 will be described another embodiment of an inkjet printer according to the present invention.

On the basis of 100 aluminum oxide or other suitable material formed of the first layer 102 of the piezoelectric material. On top of this layer formed another layer 104 of the piezoelectric material. The channels 106 for ink cut or otherwise formed in the two piezoelectric layers 102, 104 in a manner analogous to the method described with reference to previous figures.

The shifter channels 106 are shown figure 11, which also shows the nozzle 108. In this case, the nozzle is displaced by themselves. This is an option that can be used in some embodiments of the invention to compensate for any separation on a printing medium droplets ejected from different groups of channels.

Frame 110 jumper, respectively, formed of plastic injection molding and formed on the base 100, and this frame jumper includes two parallel end element 112 (only one of which is shown in figure 10) and two parallel transverse element 114 and 116. The transverse element 116 jumper facing inner surfaces of the edges of the piezoelectric layers 102 and 104, and these surfaces to which OMCI determines the manifold 118 to ink. The surface 102A of the edges of the piezoelectric layer 102 is inclined at an angle of approximately 45° to the base 100. Surface a edges of the piezoelectric layer 104 is tilted by the same and opposite angle.

Integrated circuit 120 is placed between the transverse elements 114 and 116 jumpers. The circuit comprises a circuit run to activate walls formed between adjacent channels for ink and described in more detail with reference to the preceding embodiment of the invention. Conductive paths 122 extend across the top surface of the base 100, the transverse element 116 jumper across part of the base 100, which connects the manifold 118 to the ink, and to the upper part of the inclined surface 102A to connect to the electrodes formed inside the channel for ink.

A set of metal or plastic layers 124, 126 and 128 extends across the printer. On top of this set posted layer 130 spacers, usually made from plastic, and a metal plate 132 of the filter is installed at the top of this layer spacers. The group of small holes for ink inlet formed in the circuit Board 132 of the filter. The ink inlet formed through port 136 with its corresponding frame 138. Port 138 to release the ink is communicated with a relatively large hole 140 formed in the circuit Board 132 of the filter and also in the layers 26 and 128 set. For - 132 filter formed region 142 of the recess in the layer spacers 130. This area of the recess communicates with the reservoir 118 for ink through the transverse groove 144, cut through the set 124, 126 and 128. From the end of the print head adjacent the piezoelectric material in the groove 142 extending fingers 146. These fingers are more clearly shown at 11, and they pass through the layer spacers 130 and three layers 124, 126 and 128 of the set. Along the opposite end of the groove 144 formed in the ledge 148 removing layers 124 and 126. Extending backward from this ledge, across the element 116 jumpers and over the integrated circuit 120 and element 114 lintel formed by the trajectory of the release of the ink removing layer 126. This trajectory is communicated with the hole 140. Thus, it will be seen that ink flow through the port 136 to the inlet of the ink through the holes 134 of the filter across the region 142 of the recess and through the slot 144, essentially, between the fingers 146 and the ledge 148. Ink to pass from the manifold 118 along the trajectory defined by the removal of the layer 126, the hole 140 and the port 138 to release ink.

It should be recognized that there are many options available ink supply to the manifold and from him.

Will be more useful to consider the size of the offset channel.

Fig shows the device, which is formed of only one layer of the two previously described layers of the piezoelectric m the material, it is the Board 200 of the drive. The electrodes 202 are formed on the walls of the PCB actuator using way directional vacuum plantings. As shown in the figure, the resulting coating extending over the different sections of the channel output, depending on the depth of the channel formed in the circuit Board of the drive. The greater the depth of the channel formed by the channel of the drive, the more the electrode extends over the Central area of the channel. If less than the depth of the channel formed by the channel in the circuit Board of the drive, the coating extends to the base of the channel.

After actuation of the actuator by Fig, and if DB=DCthat is, the depth of each channel was 450 μm with alternative channels extending 300 μm in the Board component 200 and the actuator 150 μm in the cover 204; 300 μm in the cover, 150 μm component of the actuator, respectively, it was found that the speed drops significantly changed depending on which channel they were thrown out. The applicant believes that the higher efficiency of the upper channel is due, in particular, a large coefficient of sound reflection at the end of the channel cover. The end of the channel of the cover terminates in a straight edge facing the manifold ink supply, and it provides an effective acoustic boundary. As explained and as is known from the prior technical and, the sound wave is initiated in the channel release after moving the walls of the drive. The wave propagates in the backward direction along the channel and is reflected in the acoustic boundary at the time, which is a function of the speed of sound in the ink. The sound wave then propagates in the forward direction along the channel and may be reinforced by additional movement of the walls of the actuator, and the droplets are ejected in an appropriate time. Acoustic boundary is formed whenever there is a change in acoustic impedance, for example, the change in the depth of the ink or sharp output channel high resistance in the camera low resistance. Other types of acoustic boundaries are well known in the prior art. The applicant believes that a straight edge perpendicular to the direction of the channel length, the end of the channel cover more effectively reflects the sound wave than the acoustic boundary formed by the channels of the actuator. Was established a number of printheads, which had a total length of channel 550 μm, but different depths of the channels of the cover and drive. It was unexpectedly discovered that the velocity of ink drops ejected from the channels that extend over a greater distance in the component cover, and channels that extend over a greater distance in the component of the actuator can be adjusted by selecting relevant to the respective depths and thereby the respective cross-sectional areas of the channels. In this embodiment of the invention, the speed can be equal to the value of about 7.5 m/s, where is formed the length of the channel 550 μm dimensions 215 μm and 335 μm in the component cover and the component of the actuator and, accordingly, alternative channels, respectively, extending at 335 μm and 215 μm in the component cover and the component of the actuator. It will be clear that there is an optimum configuration of channels for other depths and widths of channels.

Another advantage of the offset channels is that high frequency can be preserved even in cases of freezing process, that is, when ink is ejected from the channel output with such speed that interrupted the flow of ink to the channel output, and the problems these situations can be solved by installing a channel release with greater cross-sectional area.

Print heads are shifted channel with monolithic cantilever design, as shown in Fig require a higher triggering voltage for the lower channels than the print head is shifted channel herringbone configuration used in the previously described embodiments and is shown for comparison in figure 9. Here the component 300 of the actuator is formed of two plates 320, 322 of the layered material transducers (piezoelectric transducer).

Adhesive bonding between the two materials protivopul the Noah polarity probes placed in the center of the moving parts of the channel walls, and the moving parts of the channel walls completely covered with electrodes. As a result of measurements, it was found that Chevron design in comparison with the monolithic design of the offset channel is identical depth had significantly increased efficiency in the formation of drops and lower triggering voltage by more than 10 C.

Now it was found that there is an opportunity to further improve the characteristics of the emission modification factor sound reflection channel drive. On Fig shows a case in which is formed a chamber 325 acoustic reflections in the component of the actuator. Fig shows the situation where established Luggage acoustic reflection acoustically transparent layer 330 glue, stretching to the distance (101000) μm along the channel length, and this length can be selected by routine experimentation to achieve the desired sound reflection.

Fee actuator manufactured according to the steps shown in Fig and 19. Bearing 430 made of a material that thermally consistent with the material of the active element 432 probe has a flat section 434, which has probes or layered material probes. The probes attached to the support by adhesive 436, which is acoustically transparent ink that will be used in the drive. Acoustic transparency means that the mass of glue creates is from the same sound reflection coefficient, as the mass of the ink. The adhesive must be chemically inert to ink. The depth of the adhesive between the back of the probe and the support is preferably greater than the depth of the adhesive between the base of the probe and support, as it provides a strong connection with a support and a high coefficient of sound reflection.

The corresponding thickness of the adhesive on the back of the drive probe provides the required coefficient of sound reflection. Channels 438 sawn and extend through the probe and adhesive support. Are preferably epoxy adhesives.

Speed of droplets of ink between the upper channels (greater elongation of the channel component in the lid) and bottom channels (greater elongation of the channel component of the actuator) can be aligned using 2 cycle, 2 phase excitation sequence. Adjacent the upper channels are activated when the first voltage in the first cycle and the first phase of the excitation sequence. The lower channels are activated at higher voltage on the second phase and in the second cycle of the printhead that is required to ensure equality in the emission characteristics of the upper and lower channels. This technique can be used even when the modified characteristics of sound reflection, as described above. As indicated previously, alternatives to the use of different voltages are again the ranks of the pulse rise or different pulse duration.

Education thus drive components in this design provides all the advantages of coasting, i.e. plot of variable depth on the rear part of the channel output, from the viewpoint of processability, for example, the separation plate on crystals and sawing, as well as electrical connections, together with the improvement of the coefficient of sound reflection. This variant of the actuator has been described with reference to the offset channels, however, the modification relating to improved acoustic boundary channel drive, can equally be applied to channels that do not have a bias, as shown, for example, on Fig where the component cover has no channels, and Fig where the component cover is equipped with a TV. The channels formed in the cover to provide greater efficiency and reduce crosstalk channels formed only in the component of the drive.

Although the invention has been illustrated with an odd channels forming one group and the even-numbered channels, forming another, offset group, to a person skilled in the art will be obvious alternative device grouping. This modification is one of the many modifications that can be made without departing from the scope of protection and the spirit of the invention defined by the claims.

Each feature described in the text descriptions of the sludge is the formula of the invention, can be combined with any other sign or signs in the text of the description or the claims without departing from the scope of the invention described here.

1. The droplet deposition device, comprising a housing structure that defines a Central plane and in the plane direction of elongation of the channel, many of elongated channels for ejection of droplets extending through the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, and each channel passing through the Central plane that is offset perpendicular to the Central plane with respect to the adjacent channel, the corresponding nozzle for ejection of droplets that communicates with each channel, activating the means for generating a sound wave in a selected channel and thereby perform ejection of droplets through the corresponding nozzle, the manifold extending through the Cabinet structure parallel to the Central plane and perpendicular to the direction of elongation channel, and the collector crosses each channel to determine the profile of the end of the channel, while the profile of the end of one channel, essentially, is a mirror image in the Central plane of the profile of the end adjacent the channel so that the reflection coefficient of sound wave boundary between each channel and the reservoir, essentially, is Odie is acowym for all channels.

2. The device according to claim 1, in which the profile of the end of each channel includes a surface profile that is inclined relative to the direction of elongation of the channel, the angle of inclination of the surface profile for one channel is equal and opposite to the angle of the adjacent channel.

3. The device according to claim 1 or 2, in which the conductive track extends along part of the profile of the end of the channel for each channel.

4. The device according to claim 3, in which the aforementioned electrically conductive paths are formed by the deposition of a continuous conductive layer and subsequent removal of material for contouring paths.

5. The device according to claim 4 in which the said material is removed by laser processing.

6. The droplet deposition device, comprising a housing structure that defines a Central plane and in the plane direction of elongation of the channel, many of elongated channels for ejection of droplets extending through the Central plane of the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, the first channel group is offset from the Central plane in a first bias direction perpendicular to the Central plane, and a second group of channels is offset from the Central plane in the second direction of displacement is perpendicular to the Central plane, with the abuser nozzle for ejection of droplets, communicates with each channel drives, including the relevant area of the piezoelectric material with electrodes connected to receive trigger signals, each drive after receiving the triggering signal is for generating a sound wave in a selected channel and thereby perform ejection of droplets through the corresponding nozzle, the manifold extending through the Cabinet structure parallel to the Central plane and perpendicular to the direction of elongation of the channel, and the collector crosses each channel to determine the profile of the end of the channel, the conductive track extending at least part of the profile of the end of each channel, while the conductive paths transmit trigger signals to the electrodes, moreover, the profile of end of the channel of the first group, essentially a mirror image in the Central plane of the profile of the end of the channel of the second group, so that the reflection coefficient of sound wave boundary between each channel and the collector is essentially the same for all channels.

7. The device according to claim 6, in which the cross-section of the collector symmetrically to the Central plane.

8. The device according to claim 6 or 7, which further includes a first electrical triggering circuit for generating the first trigger signal, activity the irradiation channels of the first group of channels, and second electrical triggering circuit for generating the second trigger signal, activating the channels of the second group of channels, the first and second groups of channels are activated alternately, and the first trigger signal differs from the second trigger signal to the extent that is necessary to provide the same speed of ejection of droplets from the channel of the first group and the second channel group.

9. The device according to claim 8, in which the first trigger signal differs from the second trigger signal at a triggering voltage, rise of the pulse or the pulse duration.

10. The droplet deposition device, comprising a housing structure that defines a Central plane and in the plane direction of elongation of the channel, many of elongated channels for ejection of droplets extending through the Central plane of the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, the first channel group is offset from the Central plane in a first bias direction perpendicular to the Central plane, and a second group of channels is offset from the Central plane in the second direction of displacement is perpendicular to the Central plane, the corresponding nozzle for ejection of droplets that communicates with each Kana is om, electrically driven means for generating a sound wave in a selected channel and thereby to perform ejection of droplets through the corresponding nozzle, the manifold extending through the Cabinet structure parallel to the Central plane and perpendicular to the direction of elongation of the channel, while the collector crosses each channel of the first channel group having a coefficient of reflection of the sound wave on the collector, which differs from the coefficient of reflection of the sound wave at the collector of the second group of channels, the first electrical triggering circuit for generating the first trigger signal, activating the channels of the first group of channels and a second electrical triggering circuit for generating the second trigger signal, activating the channels of the second group channels, while the first and second groups of channels are activated alternately, and the first trigger signal differs from the second trigger signal to the extent that is necessary to provide the same speed of ejection of droplets from the channel of the first group and the second channel group.

11. The device according to claim 10, in which the first trigger signal differs from the second trigger signal at a triggering voltage, rise of the pulse or the pulse duration.

12. The method of deposition of CA is spruce, including the creation of Cabinet structure defining a Central plane and in the plane direction of elongation of the channel, multiple elongated channels for ejection of droplets extending through the Central plane of the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, and each channel is offset from the Central plane with respect to adjacent channel corresponding to a nozzle for ejection of droplets connected with each channel, and a manifold extending through the Cabinet structure parallel to the Central axis and perpendicular to the direction of elongation of the channel, while the collector crosses each channel to determine the profile of the end of the channel, generating sound waves in the first channel and thereby perform ejection of droplets through the corresponding nozzle, generating sound waves in the second channel and thereby perform ejection of droplets from the nozzle, while maintaining the equality of the coefficient of reflection of the sound wave boundary between the first channel and the collector and the reflection coefficient of sound wave boundary between the second channel and the collector.

13. The method according to item 12, in which the profile of the end of each channel includes a surface profile that is inclined relative to the direction of elongation of the channel, PR is the angle of inclination of the surface profile for one channel is equal and opposite to the angle of the adjacent channel.

14. The use of droplet deposition device, comprising a housing structure that defines a Central plane and in the plane direction of elongation of the channel, many of elongated channels for ejection of droplets extending through the Central plane of the Cabinet structure parallel to the Central plane and in the direction of elongation of the channel, the first channel group is offset from the Central plane in a first bias direction perpendicular to the Central plane, and a second group of channels is offset from the Central plane in the second direction of displacement is perpendicular to the Central plane, the corresponding nozzle for ejection of droplets that communicates with each channel, electrically driven means for generating a sound wave in a selected channel, and execution thereby eject droplets through the corresponding nozzle, the manifold extending through the Cabinet structure parallel to the Central plane and perpendicular to the direction of elongation of the channel, while the collector crosses each channel of the first channel group having a coefficient of reflection of the sound wave on the collector, which differs from the coefficient of reflection of the sound wave at the collector of the second group of channels, and the application includes the operations of alternate feed pervagatusque signal to activate the selected channels of the first group and the second trigger signal to activate the selected channels of the second group, the first trigger signal differs from the second trigger signal to the extent that is necessary to provide the same speed of ejection of droplets from the channel of the first group and the second channel group.

15. The application 14, in which the first trigger signal differs from the second trigger signal at a triggering voltage, rise of the pulse or the pulse duration.

16. The droplet deposition device, including the cost of the drive, including many channels formed with a predetermined interval between the channels, and each of these channels has a plot predetermined length d1, and the portion of the said length having a constant depth and a portion of the said length has a variable depth charge nozzle, forming the end wall of the above-mentioned channels of the actuator, in which the said channels drive tools include modifications to reflect sound waves that contain a groove extending across the length of the channels of the drive.

17. The droplet deposition device, including the cost of the drive, including many channels formed with a predetermined interval between the channels, and each of these channels has a predetermined length d1, and the portion of the said length having a constant depth and a portion of the said length is variable g is obinu, cost of cover, including many channels formed with a predetermined interval between the channels and having a length d2 of the channel, where d2 is less than d1, in this case, at least one of the channels of the actuator is connected by a fluid medium, at least one of these channels cover charge nozzle, forming the end wall of the above-mentioned channels of the actuator and the said channels of the cover, in which at least some of these channels drive tools include modifications to reflect the sound waves, so that the reflection of the sound wave channel emissions generated from channel drive, United by fluid channel cover essentially identical to the reflection of the sound wave channel emissions generated from channel drive, which is not connected to the channel cover.

18. The device 17, which means modification of the reflection of sound waves include a groove extending across the length of the channels of the drive.

19. The device according to item 16 or 18, in which the transverse groove filled ejected fluid medium.

20. The device according to p, in which the transverse groove filled with an acoustically transparent solid body.

21. The device according to claim 20, in which the acoustically transparent solid body of adhesive material, preferably epoxy compound.



 

Same patents:

FIELD: typewriters, printing devices; drop precipitation components, drop precipitation plates with nozzles.

SUBSTANCE: the method for forming a component of plate contains operations: forming of the body using first material, where aforementioned body has periphery, forming of the cover using second material, around the aforementioned body, in such a way that the cover extends at least across a part of the periphery of aforementioned body, and forming of the nozzle, which passes through aforementioned body. The method for forming a plate, when the plate with nozzles is limited to the plane of plate with nozzles and contains a plate, which has at least one layer of plate with nozzles and a set of nozzles, where each nozzles passes through plastic placed within an aperture in the plate with nozzles, contains operations for forming a set of individual bodies of polymeric material, distributed across the plane of plate with nozzles, and forming of at least one metallic layer of plate with nozzles by galvanoplastic application around aforementioned bodies of polymeric material. The method for forming a component of the plate contains following operations: creation of a layer of first photo-resistive material on a substrate, selective development and removal of photo-resistive material on the substrate to form a mesh of separate bodies of first material on the substrate, creation of first metallic cover around aforementioned bodies to form metallic plate with nozzles, having apertures, each one of which contains a body of aforementioned first material, and creation of a nozzle, which passes through each body.

EFFECT: an improved method is suggested for manufacturing the component meant for usage in a device for drop precipitation.

3 cl, 12 dwg

FIELD: printing devices.

SUBSTANCE: cartridge comprises compact structure of electrical connections, which includes a number pairs of matrix-columns of electrical contact areas arranged over the back side of the cartridge and connected with the droplet generators.

EFFECT: enhanced reliability.

13 cl, 18 dwg

FIELD: jet printing.

SUBSTANCE: device 100 has three column matrices 61 of drop emitters, configured for multi-pass color printing with printing resolution, having a step of carrier axis points, which is less, than step of columnar nozzles of ink drop emitters. Jet printing head has resistors of high resistance heater and effective control circuits, which are configured to compensate alteration of parasite resistance, caused by power routes (86a, 86b, 86c, 86d).

EFFECT: compactness of jet printing head with large number of ink drop emitters.

20 cl, 11 dwg

The invention relates to the technique of inkjet printing and can be used in inkjet printers and other printing devices

Microinjector // 2146621

FIELD: jet printing.

SUBSTANCE: device 100 has three column matrices 61 of drop emitters, configured for multi-pass color printing with printing resolution, having a step of carrier axis points, which is less, than step of columnar nozzles of ink drop emitters. Jet printing head has resistors of high resistance heater and effective control circuits, which are configured to compensate alteration of parasite resistance, caused by power routes (86a, 86b, 86c, 86d).

EFFECT: compactness of jet printing head with large number of ink drop emitters.

20 cl, 11 dwg

FIELD: printing devices.

SUBSTANCE: cartridge comprises compact structure of electrical connections, which includes a number pairs of matrix-columns of electrical contact areas arranged over the back side of the cartridge and connected with the droplet generators.

EFFECT: enhanced reliability.

13 cl, 18 dwg

FIELD: typewriters, printing devices; drop precipitation components, drop precipitation plates with nozzles.

SUBSTANCE: the method for forming a component of plate contains operations: forming of the body using first material, where aforementioned body has periphery, forming of the cover using second material, around the aforementioned body, in such a way that the cover extends at least across a part of the periphery of aforementioned body, and forming of the nozzle, which passes through aforementioned body. The method for forming a plate, when the plate with nozzles is limited to the plane of plate with nozzles and contains a plate, which has at least one layer of plate with nozzles and a set of nozzles, where each nozzles passes through plastic placed within an aperture in the plate with nozzles, contains operations for forming a set of individual bodies of polymeric material, distributed across the plane of plate with nozzles, and forming of at least one metallic layer of plate with nozzles by galvanoplastic application around aforementioned bodies of polymeric material. The method for forming a component of the plate contains following operations: creation of a layer of first photo-resistive material on a substrate, selective development and removal of photo-resistive material on the substrate to form a mesh of separate bodies of first material on the substrate, creation of first metallic cover around aforementioned bodies to form metallic plate with nozzles, having apertures, each one of which contains a body of aforementioned first material, and creation of a nozzle, which passes through each body.

EFFECT: an improved method is suggested for manufacturing the component meant for usage in a device for drop precipitation.

3 cl, 12 dwg

FIELD: power engineering.

SUBSTANCE: device comprises housing structure that defines the central plane, a number of passages for discharging droplets that pass through the housing structure parallel to the central plane, nozzle for discharging droplets, means for generating sound wave within the passage, and collector that is extended throughout the housing structure parallel to the central plane and perpendicular to the passages. The passages passing through the central plane are shifted perpendicular to the central plane with respect to the adjacent passages. Each nozzle is in communication with the appropriate passage. The collector crosses the passage so that the reflection coefficient of the sound wave of the boundary between each passage and collector is the same for all passages. According to the second version, the device has first group of passages shifted with respect to the central plane in the first direction perpendicular to the central plane, second group of passages shifted with respect to the central plane in the second direction perpendicular to the central plane, and drives. According to the third version, the device has additional means for generation of sound wave and discharging droplet through the nozzle. The collector intersects each passage of the first group whose reflection coefficient differs from that of the second group of passages, first circuit for generating first exciting signal that excite the passages of the first group, and second exciting circuit for generating the second exciting signal that excites the passages of the second group. The first and second group of passages are excited alternatively.

EFFECT: improved design.

21 cl, 21 dwg

FIELD: production methods; jet printing.

SUBSTANCE: method of high speed creating of multicolor printings during steam processing is foreseen: providing as minimum two steam printings heads, working on high operational frequency, and the printing heads, working on high operational frequency, allow to process the ink with phase changing; providing as minimum two kinds of oil going trough them, and the passing of the base under the printing heads with the speed of 1000 foots per minute; where on the base is formed as minimum one illustration during the process of steam processing. The method of providing high speed, resistant to coloring and other surfaces under the touching of print during the process of material steam processing with using of inks with phase changing is overseen: the providing as minimum one set of printing heads, allowing to use ink with phase changing, with frequency 20kHz, the material providing; the providing of the system for transporting of the material, which allows to transportate the material under the printing heads; providing of great amount of inks with phase changing; transportation of material over the printing head sets with the speed 1000 foots/minute, ejection of ink as minimum from two printing heads to the material, for illustration forming. The method of providing high speed, resistant to coloring and other surfaces under the touching of print during the process of material steam processing with using of inks with phase changing is overseen: the providing as minimum one set of printing heads, allowing to use ink with phase changing, with frequency 20kHz, providing of porous material; providing of transportational system of material, which allows to transportate the material under the printing heads; providing of great amount of inks with phase changing; transportation of material over the printing head sets with the speed 1000 foots/minute, ejection of ink as minimum from two printing heads to the material, for illustration forming; on the stage of ejecting of inks its formed the illustration, which has up to 200 points/printing head/ liner inch.

EFFECT: under the decreasing of the costs it is decreasing the amount of trash and increased the efficiency.

33 cl, 1 dwg

FIELD: technological processes, typography.

SUBSTANCE: method for making components for jet printing head consists of the following stages: making case, with upper surface, making several apertures in the indicated upper surface, passing into the case, and an actuating structure inside each of the apertures. Each actuating structure remains fixed to the body frame during operation. The actuating component for the jet printer with formation of drops under request, has a case with an upper surface, an aperture in the upper surface, passing into the case along the axis of the aperture, a convex actuating structure inside the aperture, and electrodes, which are positioned such that, they can apply a field to the actuating structure in such a way that, the actuating structure is deformed. Electrical voltages applied to the walls do not give rise to deviation of the walls and emission of drops through the nozzle.

EFFECT: fast propulsion, without loss of accuracy and piezoelectric material settles uniformly, actuating mechanisms have same channel separation along matrix.

36 cl, 69 dwg

FIELD: machine-building.

SUBSTANCE: invention related to flowing media ejection device and to the device control electrical chain. Half-conductor system contains an undercoat, which has first surface, first insulation material, located on at least the first surface segment, and first insulation material contains many holes, which forms a route to the first surface, a first conducting material, located on the first insulation material, in a way that many holes basically are free of the first conduction material, a second insulation material, located on the first conduction material and partly on the first insulation material, in a way that many holes basically are free of the second insulation material, and second conduction material, located on the second insulation material and inside of the many holes, in a way that some part of the second conduction material, located on the second insulation material, has electrical contact with the undercoat.

EFFECT: invention has higher technical requirements at manufacturing cost decrease.

60 cl, 9 dwg

FIELD: printing industry.

SUBSTANCE: head for jet printing device comprises base, having inlet channel for ink, ejection outlet hole to eject ink supplied through inlet channel, flow area, which provides for fluid medium communication between inlet channel and ejection outlet hole. Additionally flow area includes the first flow formed near base and the second flow formed along the first flow at side opposite to base relative to the first flow. Width of the first flow differs from width of the second flow in plane of section perpendicular to direction of ink flow. Besides, between the first flow and the second flow there is a stepped section.

EFFECT: invention provides for structural design of head, in which channels are suitable in resistance to flow of ink, have satisfactory thickness of side walls, making it possible for neighbouring channels to eject various amounts of ink.

7 cl, 19 dwg

FIELD: printing.

SUBSTANCE: reference element is formed of a material which contains a mixture of first resin and second resin, which structural formula is different from the first resin, and is moulded between the feeding element and the substrate of the ejecting element, so that is an integral part of the feeding element.

EFFECT: head for ejecting fluid and method of its manufacture provide the ability to compound the reference element and an element for supplying ink with high impermeability and low probability of delamination, ie with high affinity to each other.

19 cl, 17 dwg, 2 tbl

FIELD: process engineering.

SUBSTANCE: ink-jet printer ink ejection head has power supply conductor, hear conductor and excitation circuit conductor arranged to the left of ink feed port. Said conductors may be arranged using a portion of jumper located to separate feed ports. Besides, multiple feed ports are configured to feed ink and pressure chambers and separated by means of jumpers. Thus, ejection opening may be located on both sides of said feed ports. Conductor connected heater with poser supply conductor or excitation circuit is also located in jumper portion making a separation baffle for feed ports.

EFFECT: dense configuration of pressure chambers and ejection openings, optimum sizes of heaters.

12 cl, 49 dwg

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