CN1623784B - Printhead assembly with ink distribution mechanism - Google Patents

Abstract

A print head module with a slender ink distributing structure is disclosed. Said ink distributing structure has multiple chip recesses and multiple converged ink guiding tubes terminated at said chip recesses. The size of said ink distributing structure can make it across the print medium. Multiple chips of ink-jet print head are respectively arranged in relative chip recesses. Each chip of print head has multiple ink inlets communicated with relative ink guiding tubes. An ink distributing member has an ink tube for injecting ink in it and multiple outlets communicated with said ink guiding tubes.

Description

Printhead assembly with ink distribution mechanism

This application is a divisional application of No. 00819580.3 patent application entitled "Rotary Platen Part" filed on May 24, 2000.

technical field

The present invention relates to a printhead assembly, and more particularly to a printhead assembly with an ink dispensing device.

Background technique

For printers that can employ a rotating platen assembly, the overall design has always been based on the use of replaceable printhead modules in an approximately 8 inch (20 cm) long matrix. The advantage of this system is that any module in the printhead matrix that becomes damaged can be easily removed and replaced. This effectively eliminates the wasteful practice of having to scrap an entire printhead if only one chip fails.

The printer's printhead module may consist of a "Memjet" chip, a widely used microstructure, thermal actuator in microelectromechanical systems (MEMS). However, to the current applicant, this transmission device is likely to refer to the chip mentioned in US Patent No. 6,044,646, and it may also refer to the printed chip of other micro electromechanical systems.

Usually, the printing head as the working environment of the rotary platen member of the present invention may be equipped with six kinds of ink cartridges, which can print effects such as four-color overprinting, infrared fixing ink and fixing agent. The air pump will provide filtered air to the print head, which will effectively prevent foreign particles from falling into the ink nozzles of the print head. Typically, the printhead module will be connected to the replaceable ink cartridge, which contains the ink supply and air filter.

Each printhead module receives ink through a molded dispenser that delivers toner. Usually, ten modules are docked together to form a complete eight-inch printhead assembly, which is suitable for printing A4 size paper without the need for the printhead to scan and move back and forth between the paper width ranges.

The printheads themselves are standard components, so a full eight-inch-long array of printheads can be programmed to create a printhead of any width.

Alternatively, a second printhead assembly can be installed on the opposite side of the paper path for simultaneous high-speed printing on both sides.

Similar patent application

Various methods, systems and equipment related to the present invention are described in detail in the following similar applications jointly submitted by the applicant or the assignee together with the present application:

PCT/AU00/00518, PCT/AU00/00519, PCT/AU00/00520, PCT/AU00/00521,

PCT/AU00/00522, PCT/AU00/00523, PCT/AU00/00524, PCT/AU00/00525,

PCT/AU00/00526, PCT/AU00/00527, PCT/AU00/00528, PCT/AU00/00529,

PCT/AU00/00530, PCT/AU00/00531, PCT/AU00/00532, PCT/AU00/00533,

PCT/AU00/00534, PCT/AU00/00535, PCT/AU00/00536, PCT/AU00/00537,

PCT/AU00/00538, PCT/AU00/00539, PCT/AU00/00540, PCT/AU00/00541,

PCT/AU00/00542, PCT/AU00/00543, PCT/AU00/00544, PCT/AU00/00545,

PCT/AU00/00547, PCT/AU00/00546, PCT/AU00/00554, PCT/AU00/00556,

PCT/AU00/00557, PCT/AU00/00558, PCT/AU00/00559, PCT/AU00/00560,

PCT/AU00/00561, PCT/AU00/00562, PCT/AU00/00563, PCT/AU00/00564,

PCT/AU00/00565, PCT/AU00/00566, PCT/AU00/00567, PCT/AU00/00568,

PCT/AU00/00569, PCT/AU00/00570, PCT/AU00/00571, PCT/AU00/00572,

PCT/AU00/00573, PCT/AU00/00574, PCT/AU00/00575, PCT/AU00/00576,

PCT/AU00/00577, PCT/AU00/00578, PCT/AU00/00579, PCT/AU00/00581,

PCT/AU00/00580, PCT/AU00/00582, PCT/AU00/00587, PCT/AU00/00588,

PCT/AU00/00589, PCT/AU00/00583, PCT/AU00/00593, PCT/AU00/00590,

PCT/AU00/00591, PCT/AU00/00592, PCT/AU00/00584, PCT/AU00/00585,

PCT/AU00/00586, PCT/AU00/00594, PCT/AU00/00595, PCT/AU00/00596,

PCT/AU00/00597, PCT/AU00/00598, PCT/AU00/00516, PCT/AU00/00517,

PCT/AU00/00511, PCT/AU00/00501, PCT/AU00/00502, PCT/AU00/00503,

PCT/AU00/00504, PCT/AU00/00505, PCT/AU00/00506, PCT/AU00/00507,

PCT/AU00/00508, PCT/AU00/00509, PCT/AU00/00510, PCT/AU00/00512,

PCT/AU00/00513, PCT/AU00/00514, PCT/AU00/00515

The above patent applications of the same kind can be used as cross-references.

Contents of the invention

It is an object of the present invention to provide a printhead assembly with ink dispensing means for facilitating ink dispensing.

According to one aspect of the present invention, there is provided a printhead assembly comprising:

an elongated ink distribution structure provided with a plurality of chip slots and a plurality of converging ink conduits, the ink conduits terminating in the chip slots, the ink distribution structure being dimensioned to span print media;

inkjet printhead die disposed in each die slot oriented such that the printhead die form a matrix across the print medium, each printhead die having a plurality of inks each in fluid communication with a corresponding ink conduit entryway;

an elongate ink distribution member mounted on said ink distribution structure, said ink distribution member having at least one ink conduit extending substantially the length of the ink distribution structure, and a plurality of openings in fluid communication with said ink conduit; and

An ink inlet means for feeding ink into the conduit of the ink distribution member.

In the print head assembly of the present invention, by means of the ink distribution structure and the ink distribution structure thereon, the ink ejection can be directed to each printing chip to realize favorable ink distribution.

As used herein, the term "ink" may refer to any liquid that passes through a printhead and onto paper. This liquid may be one of different colored inks, infrared-fixed inks, fixatives, or similar products.

Description of drawings

Figure 1 is a front perspective view of a print engine component.

Figure 2 is a rear perspective view of the print engine components of Figure 1 .

FIG. 3 is an exploded perspective view of components of the print engine of FIG. 1. FIG.

Figure 4 is a front schematic perspective view of a printhead assembly.

5 is a rear schematic perspective view of the printhead assembly of FIG. 4 .

Figure 6 is an exploded perspective view of a printhead assembly.

Figure 7 is an elevational view of the cutaway end of the printhead assembly of Figures 4-6, with a section view taken through the center of the printhead.

8 is a schematic elevational view of the end section of the printhead assembly of FIGS. 4-6, taken near the left end of FIG. 4. FIG.

Fig. 9a is a schematic end elevational view of installing the print head layered stack structure to print chips and the nozzle protection device.

Figure 9b is an enlarged cross-sectional view of the end elevation of Figure 9a.

Figure 10 is an exploded perspective view of the printhead shield assembly.

Figure 11 is a schematic perspective view of a molded ink dispensing device.

Figure 12 is an exploded perspective view illustrating the layers of the present invention when formed into a partially layered ink distribution structure.

Figure 13 is a cross-sectional view of the top step of the structure depicted in Figures 9A and 9B.

FIG. 14 is a cross-sectional view of the bottom step of the structure depicted in FIG. 13 .

Fig. 15 is a schematic perspective view of a first laminate layer.

Figure 16 is a schematic perspective view of a second laminate layer.

Figure 17 is a schematic perspective view of a third laminate layer

Figure 18 is a schematic perspective view of a fourth laminate layer.

Figure 19 is a schematic perspective view of a fifth laminate layer.

Figure 20 is a perspective view of a molded air valve.

Figure 21 is a rear perspective view of the right end of the platen.

Figure 22 is a rear perspective view of the left hand end of the platen.

Figure 23 is an exploded view of the platen.

Figure 24 is a cross-sectional view of the platen.

Fig. 25 is a front perspective view of the printing paper optical sensor device.

Figure 26 is a schematic perspective view of a printhead assembly and ink lines attached to an ink reservoir.

FIG. 27 is a partially exploded view of FIG. 26 .

Detailed ways

Below in conjunction with accompanying drawing, preferred embodiment of the present invention is elaborated:

In Figures 1-3, the core components of the print engine components have been described in detail schematically, while also indicating the general environment in which the layered ink distribution structure of the present invention may be located. The print engine components include a chassis 10 made of extruded steel, aluminum, plastic or other rigid material. The chassis 10 is installed in the body of the printer, and is used to install the print head assembly 11, the paper feeding mechanism and other related components arranged inside the plastic shell of the printer.

Under normal conditions, the chassis 10 supports the printhead assembly 11 so that the ink can be ejected from it, land on the paper or other print medium that is being delivered to the bottom of the printhead at this time, and then be used by the paper feed mechanism. It passes through outlet slot 19 . The paper feeding mechanism includes: a paper feeding roller 12, a paper feeding guide roller 13, a platen generally indicated by 14, an exit roller 15 and a pin wheel device 16, and all devices are driven by a stepper motor 17 . These paper feeding members are installed between two bearing molded parts 18, and both ends of the two bearing molded parts are respectively connected with the chassis 10 in turn.

The printhead assembly 11 is also connected to the chassis 10 via each printhead spacer 20 already installed on the chassis 10 . These spacer moldings 20 allow the length of the printhead assembly to be increased to 220mm while allowing it to have clearance on either side of 210mm wide paper.

In general, the structure of the printhead is shown in Figures 4-8.

The printhead assembly 11 includes a printed circuit board (PCB) 21 on which various electronic components have been assembled, including: a 64MB DRAM 22, a PEC chip 23, a QA chip connector 24, a microcontroller device 25 and a dual motor driver chip 26. Typically, the print head is 203 mm long and has 10 print chips 27 (FIG. 13), each chip typically being 21 mm long. These print chips 27 are all arranged at a small angle to the longitudinal axis of the print head (see FIG. 12 ), and there is a slight overlap between the print chips, which enables continuous ink transfer across the entire length of the matrix. From an electronic point of view, each printed chip 27 is connected to one end of a Tape Automated Bonding (TAB) film 28 , while the other end remains in electrical contact with the lower surface of the printed circuit board 21 through a TAB film gasket 29 .

The preferred print chip configuration is described in detail in US Patent No. 6,044,646 issued by the applicant of the present invention. The length of each such printed chip 27 is about 21 mm, the width is less than 1 mm, and the height is about 0.3 mm; and thousands of MEMS inkjet nozzles 30 are arranged on its lower surface, which are shown in Figs. 9a and 9b has been shown diagrammatically in , usually such nozzles are installed in six pipelines-one for each ink to be used. To allow for closer point clearance, each nozzle tube can be arranged in a staggered pattern. The pipelines of the six corresponding ink channels 31 run through the rear of the entire printing chip, so as to send ink to the rear of each nozzle. As can be clearly seen from Fig. 9b, each print chip is equipped with a nozzle protector 43 so as to protect these miniature nozzles on the surface of the print chip, and the protector also has some tiny air holes 44 aligned with the nozzle 30; Ink dots ejected from these nozzles at a relatively high speed pass through these microscopic air holes and accumulate on the printing paper passing from the platen 14 .

Ink is sprayed onto the individual print chips by means of molded dispensing means 35 and layer stacking means 36 forming part of the printhead 11 . Ink from the ink cartridge 93 (see FIGS. 26 and 27 ) is passed through a separate ink hose 94 to a separate ink inlet 34 cast in one piece with a plastic tube cap 39 which forms a cover for the molded plastic dispensing device 35 . The molded dispensing means 35, however, includes six individual longitudinal ink conduits 40 and one air conduit 41 that run the entire length of the matrix. The ink from the inlet 34 is delivered to each ink channel 40 through a separate counterflow channel 42, please refer to FIG. 7 for details. Although this article describes a total of six pipes for the printhead, it is important to note that higher numbers of pipes are available. All six channels are suitable for printers capable of printing four-color overprint (CMYK) as well as infrared-fixed ink and fixative effects.

The air flows through the air inlet 61 and can be directly sent to the air duct 41 to provide air to each printing chip 27, which will be described in detail later with reference to FIGS. 6, 7, 8, 20 and 21.

A number of sheet-like layers forming the layered ink distribution stack 36 are located inside longitudinally extending stacking recesses 45 formed in the underside of the molded dispenser 35 . Typically, these sheet-like layers are made of micro-molded plastic material. Inside each TAB film groove (see FIG. 21 ) will receive TAB film 28 protruding from the bottom layer of the printhead PCB 21, wrapped around the rear of the molded dispenser 35, some of which have been placed in a layered stack around the chip housing layer 64 of the device 36 . In addition, the TAB film will transmit electronic signals through the printed circuit board 21 to each printing chip 27 supported by the layered structure.

The molding dispensing device, layered stacking device 36 and related components are introduced in detail according to FIGS. 7-19.

FIG. 10 details the molded dispenser cover 39 as a plastic moulding, including locating sleeves 48 which are used to position the top printhead cover 49 .

As shown in Figure 8, the ink delivery port 50 can be connected to an ink tube 40 (fourth from the left) which leads down to one of the six lower ink tubes or down to the molded dispenser Transition pipe 51 on the underside of the device. All ink pipelines 40 are equipped with corresponding delivery ports 50 , which communicate with transition pipelines 51 respectively. These transition channels 51 are parallel to each other, but at an angle relative to the associated ink channels 40, so that they connect together with the ink holes of the bottom layer 52 of the layered stack 36 to be mentioned hereinafter.

The bottom layer 52 includes twenty-four individual ink holes 53 , one for each of the ten printed chips 27 . That is to say, if ten such printed chips are provided, the bottom layer 52 contains two hundred and forty ink holes 53 . In addition, the bottom layer 52 also includes a row of air holes 54 located across one longitudinal edge.

Typically, each group of twenty-four ink holes 53 can be formed in a rectangular matrix centered with rows of ink holes. Each row of four ink holes is aligned with the transition tube 51 while also parallel to each print chip.

The lower surface of the bottom layer 52 includes a plurality of underside grooves 55 . Each groove 55 communicates with one of the two centermost ink holes in the four ink holes 53 (considered according to the direction crossing the bottom layer 52 ). That is, ink hole 53a (FIG. 13) supplies ink to right-hand groove 55a shown in FIG. 14, while ink hole 53b supplies ink to left-hand lowermost groove 55b shown in FIG.

The second bottom layer 56 includes a pair of slots 57 , each of which can receive ink ejected from one of the bottom grooves 55 of the first bottom layer.

The second bottom layer 56 also includes ink holes 53 which have been aligned with the outer ink holes 53 of the two first bottom layers 52 . That is to say, ink can pass through the sixteen outer ink holes 53 of the first bottom layer 52 because each printed chip can pass directly through the corresponding ink holes 53 of the second bottom layer 56 .

A plurality of laterally extending channels 58 have been formed at the lower side of the second layer 56 to divert the ink flowing through the ink holes 53c and 53d to the central area. These ducts each extend outwardly so as to align with a pair of slots 59 which have been formed by the third layer 60 of laminate. It should be noted that the third layer 60 of the laminate includes four sockets 59 corresponding to each printed chip, of which the two internal sockets are directly opposite the pair of sockets formed in the second layer 56, Whereas external slots exist outside of these two internal slots.

The third layer 60 also includes a vent hole 54 which has been aligned with the corresponding matrix of vent holes 54 provided in the first and second layers 52 and 56 .

The third layer 60 also includes eight ink holes 53 corresponding to the printing chips. These outermost ink holes 53 are aligned with the outermost ink holes 53 provided in the first and second layers. As shown in FIGS. 9a and 9b, the third layer 60 includes a laterally extending channel 61 on its outer surface, which corresponds to each ink hole 53. As shown in FIG. These conduits 61 deliver ink from the corresponding ink holes 53 to the outside just outside the centered position of the slot 59 .

As shown in Figures 9a and 9b, the top three layers of the layered stack 36 can thus be used to transfer ink from the wider gap ink tubes 40 of the molded dispenser (as shown by the dashed lines in Figure 9b) through the upper surface of each printed chip 27. Shown in cross-hatching) dredging to the middle of each slot in the team with the ink channel 31.

As shown in Figure 13, from the perspective of the top layer stack, sockets 57 and 59 are actually composed of discrete collinear gap sockets.

The fourth layer 62 of the layered stack 36 includes a matrix of ten chip sockets 65 , each socket interfacing with a respective print chip 27 .

The fifth and final layer 64 also includes a chip socket 65 that interfaces with the chip and nozzle guard 43 .

TAB film 28 is sandwiched between fourth and fifth layers 62 and 64, one or both of which may be provided with grooves to adjust the thickness of the TAB film.

The layered stack device, which is a precision micro-molding, is made by infusing an acetal diethyl alcohol (Acetal) type material. It accommodates the matrix of printed chips 27 through the already attached TAB film, while also matching the molded cover 39 mentioned above.

The ribs on the underside of the micromolding provide support for the TAB film when the rib parts are bonded together. The TAB film can form the underside walls of the printhead module because there is sufficient structural integrity between the rib spacing to provide support for the elastic film. The edges of the TAB film are sealed against the bottom wall of the mold cover 39. If the final ink is delivered to the print nozzle, the chip is attached to a 100-micron-wide rib that runs the length of the micro-molding.

Designing the micro-molding allows for physical bonding of the printed chips when they are butted in a row. Because at this point the printhead chips have formed a continuous strip (with large tolerances), it is digitally adjusted to produce a near-perfect print pattern, rather than relying on very close to the specified Tolerance moldings and foreign objects serve the same purpose. Typically, the module pitch is 20.33mm.

The layers of the layered stack and molded cap 39 and molded dispensing means may be glued or otherwise bonded together in order to provide a seal. The ink channels can be sealed with an adhesive clear plastic film to indicate when ink is present in the channel so that the ink channels are completely covered when the top adhesive film is folded over. At this point, the ink filling process is complete.

As shown in Figures 9b and 13, the upper four layers 52, 56, 60 and 62 of the layered stack device 36 have been aligned with air holes 54 which, together with air ducts 63, act as channels formed on the lower surface of the fourth layer 62. connected. These channels supply pressurized air to the gap between the print chip surface and the nozzle guard when the printer is in operating mode. Air from this plenum passes through microscopic air holes 44 in the nozzle guard, which effectively prevents any dust or unwanted contamination from accumulating at these air holes. In addition, in order to effectively prevent ink from drying on the nozzle surface when the printer is not in use, the pressurized air supply device can be turned off, and the air valve device shown in Figures 6, 7, 8, 20 and 21 can also be used to To control the air source device.

Referring to Figures 6-8, within the printhead air duct 41 there is a molded air valve 66 which is formed as a channel with a series of air holes at the bottom thereof. These air hole gaps correspond to the air passages 68 formed in the air duct 41 (see FIG. 6 ), while the air valve is molded as a longitudinally movable part within the air duct; , in order to provide pressurized air to the air hole between the printed chip and the nozzle guard through the layer stacking device, or move out of the centering position to close the air supply device. Some compression springs 69 can be kept in sealing engagement with the bottom of the molded air valve 66 by the bottom plate of the air tube 41, thereby preventing leakage when the air valve is closed.

The molded air valve 66 has an outwardly extending cam follower 70 which engages with an air valve cam surface 71 on the end cap 74 of the platen 14, thereby providing The rotation position of 14 selectively moves the mold air valve longitudinally in the air duct 41, and the reel can be rotated at positions such as printing, capping, and ink absorption according to the operating status of the printer. For other situations, refer to Figures 21-24 below Described in detail in the text. When the platen 14 is in the printing rotation position, the cam fixes the air valve in its open position, thereby supplying air to the surface of the printed chip; however, when the platen is rotated to the non-printing position, that is, the micro When the air hole is opened, the cam moves the mold air valve to the valve closed position.

Referring to drawings 21-24, the platen assembly 14 is supported by the rotating shaft 73 on the mold bearing 18 and rotated by the gear device 79 (see FIG. extend. This rotating shaft is equipped with a right-hand end cap 74 and a left-hand end cap 75 respectively at two ends, also is equipped with two cams 76 and 77 simultaneously.

The platen assembly 14 has a roll surface 78, a capped portion 80 and an exposed blotter portion 81 extending along its length, the three portions being separated by 120 degrees from one another. During printing, the platen assembly may be rotated so that the platen surface 78 is positioned to face the printhead so that the platen surface supports a portion of the paper being printed on at the time. When the printer is in the idle state, the platen assembly is rotated such that the capped portion 80 contacts the bottom of the printhead and seals the area around the micro-air holes 44 . Combined with closing the air valve by the air valve means when the platen 14 is in its capped position, this maintains a sealed air pressure at the print nozzle face. In addition, this also serves to reduce the evaporation of the ink solvent (usually water), thereby reducing the amount of ink drying on the individual print nozzles when the printer is not in use.

A third function of the rotating platen assembly is to act as a blotter to absorb ink from priming of the print nozzles during printer startup or maintenance operations. In this mode of the printer, the platen assembly 14 is rotated such that the exposed ink absorbing portion 81 is positioned opposite the ink ejection path of the nozzle guard 43 . The exposed ink-absorbing portion 81 is the exposed portion of the body of the ink-absorbing material 82 inside the platen assembly 14, so the ink received on the exposed portion 81 is all absorbed into the body of the platen assembly.

See Figures 23 and 24 for additional details regarding the structure of the platen assembly. Typically, the platen assembly consists of a molded or molded hollow platen body 83 which not only forms the platen surface 78 but also receives a shaped body of blotting material 82 through which the The components designed for the longitudinal slots of the frame will form the exposed ink-absorbing surface 81 . The flat member 84 of the platen frame 83 can be used as a base for attaching the capping assembly 80 consisting of a capping machine housing 85, a capping machine seal assembly 86, and foam for contacting the nozzle guard 43. Several parts such as assembly 87 constitute.

According to FIG. 1 , each molded bearing 18 may span a pair of vertical rails 101 . That is to say, the capping device will be installed on four vertical rails 101 that allow it to move vertically. Springs 102 at either end of the capping device bias the capping device into the raised position while maintaining cams 76 and 77 in close contact with spacer projections 100 .

When the printhead 11 is not in use, the full swath capping assembly 80 may be covered by the use of an elastomeric seal 86 (or similar). To rotate the platen assembly 14, the main roll drive motor may be reversed. This will bring the reversing gear into contact with the gear 79 at the end of the platen unit and rotate it into any of its three functional positions (each 120 degrees apart).

Cams 76 and 77 on platen end caps 74 and 75 engage protrusions 100 on each printhead pad 20 to effectively control the gap between the platen assembly and the printhead, depending on The rotational position of the platen assembly. In this way, in order to provide greater clearance from the print head during the shifting of the platen position, the platen can be moved away from the print head, and at the same time moved back to a suitable distance so that it respectively acts on the paper. Support, capping and ink absorption functions, etc.

Additionally, the cam arrangement of the rotary platen, which can be rotated slightly by rotating the platen 14, provides a mechanism for fine-tuning the distance between the surface of the platen and the printer nozzles. This allows the paper thickness optical sensor unit (shown in Figure 25) to react to the thickness of the paper or other material being printed to compensate for the nozzle to platen spacing.

The paper thickness optical sensor comprises an optical sensor 88 and a sensor light barrier assembly: the former mounted on the lower surface of the PCB 21; and the latter mounted on a robotic arm 89 protruding from the molded dispenser. The sensor shutter assembly includes a sensor shutter assembly 90 mounted on a shaft 91 which is biased by a torsion spring 92 . As the paper enters the feed rollers, the lowest portion of the light barrier assembly contacts the paper and simultaneously rotates in the direction opposite to the bias of the spring 92 at a speed dependent on the thickness of the paper. The optical sensor then detects this movement of the light barrier assembly and the PCB reacts to the detected paper thickness by causing compensating rotation of the platen 14 to optimize the distance between the paper surface and the nozzle.

26 and 27 illustrate the attachment of the illustrated printhead assembly to a replaceable ink cartridge 93. As shown in FIG. Six inks of different colors are input to the print head through hoses 94 leading from a row of ink valves 95 with internal threads located inside the printer frame. A replaceable ink cartridge 93 containing a matrix of six-spaced ink bladders and corresponding male threaded valves is inserted into the printer and mated with valves 95. The ink cartridge also contains an air inlet 96 and air filter (not shown) and mates with an air inlet connector 97 which is located near the ink valve and leads into an air pump 98 which supplies filtered air to the printhead. At the same time, a QA chip is included in the ink cartridge. When the ink cartridge is inserted to establish contact with the QA chip connector 24 on the PCB, the QA chip will be connected to the contact 99 between the ink valve 95 and the printer suction port connector 96 .

Claims (4)

1. print head assembly, it comprises:

Black stack apparatus (36) is joined in an elongated layering, describedly join black stack apparatus and limit a plurality of chip grooves (65) and a plurality of ink port that converges (53), described ink port ends at described chip groove, and the size that black stack apparatus is joined in described layering is set to across print media;

Be arranged on the inkjet printhead chip (27) in each chip groove (65), described chip groove is oriented to and makes print head chip limit the matrix across print media, and each print head chip (27) has a plurality of ink channels (31) that are communicated with corresponding ink port (53) fluid respectively;

One is installed in described layering and joins the molded distributor of elongated ink (35) on the black stack apparatus, described molded distributor limits at least one and extends ink pipeline (40), a plurality of transition conduit (51) that the length of black stack apparatus is joined in layering substantially, with a plurality of ink transport mouths (50) that the ink pipeline is connected with transition conduit, described transition conduit is communicated with described ink port fluid; And

Molded ink inlet (34) in the lid (39) of molded distributor is used for the ink pipeline (40) of the molded distributor of the described ink of ink feed-in or each ink pipeline (40) of the molded distributor of described ink.

2. print head assembly as claimed in claim 1, it is characterized in that, described elongated layering is joined black stack apparatus (36) and is comprised ground floor (52), and described ground floor limits a plurality of ink ports that are communicated with the corresponding ink transport mouth fluid of the molded distributor of described ink through described transition conduit.

3. print head assembly according to any one of the preceding claims, it is characterized in that, the molded distributor of described ink limits a plurality of ink pipelines, the corresponding a kind of corresponding ink of each ink pipeline, described layering are joined black stack apparatus and are configured to make every kind of ink along a delivery pathways that converges to inkjet printhead chip.

4. printer that comprises each described print head assembly in the above claim.

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