Modular printhead with closely spaced rows in media feed direction
View Patent ↗An ink jet printhead assembly includes a chassis. A number of printhead modules are mounted on the chassis. Each printhead module includes an ink distribution member that is attached to the ink reservoir. An elongate printhead integrated circuit is arranged on the ink distribution member to receive ink fed from the ink distribution member. The printhead modules are positioned on the chassis so that the printhead integrated circuits span a printing zone.
1. An inkjet printhead comprising:
a support member for mounting a plurality of printhead IC's in a printer adjacent a media feed path, each of the printhead IC's having at least 2000 nozzles an'd being configured to print at least three colors of ink; wherein,
the plurality printhead IC's define an array of the nozzles that extends more than 80 mm in a direction perpendicular to the media feed direction and extends less than 10 mm parallel to the media feed direction.
2. An inkjet printhead according to claim 1 wherein each of the printhead IC's having at least 5000 nozzles.
3. An inkjet printhead according to claim 2 wherein the nozzles on each printhead IC are arranged into a series of rows extending generally transverse to the media feed direction such that the first row in the series is spaced less than 10 mm from the last row in the series with respect to the direction of media feed.
4. An inkjet printhead according to claim 3 wherein some of the nozzles from each printhead IC overlap with some of the nozzles on an adjacent printhead IC with respect to the direction perpendicular to the media feed direction.
5. An inkjet printhead according to claim 4 wherein each of the series of nozzle rows on each printhead IC are angularly displaced by less than 15 degrees from a direction perpendicular to the media feed direction such that the nozzles from each printhead IC can overlap.
6. An inkjet printhead according to claim 5 wherein the printhead IC's are each mounted to a respective module for removable attachment to the support member, each module having an ink distribution member for supplying the printhead IC.
7. An inkjet printhead according to claim 6 further comprising a reservoir that is mounted on the chassis, the ink distribution member being connected to the reservoir to receive ink from the reservoir.
8. An inkjet printhead according to claim 7 wherein wherein the ink reservoir is a molding that defines a number of ink vessels, each of which configured to store ink of a particular color, the ink reservoir including feed openings to permit ink from the ink vessels to be fed to the ink distribution member.
9. An inkjet printhead according to claim 8 wherein each ink distribution member at least partially defines a number of ink chambers, which correspond with respective ink vessels of the reservoir, and complementary feed openings which correspond with each of a number of sets of feed openings of the ink reservoir so that ink from each ink vessel can be fed to respective ink chambers of the ink distribution member.
10. An inkjet printhead according to claim 9 wherein each ink distribution member is an injection micro-molding.
11. An inkjet printhead according to claim 10 wherein each ink distribution members has a tape automated bond (TAB) film electrically connected to the respective printhead integrated circuit, the TAB film partially defining the ink chambers of the respective ink distribution member.
12. An inkjet printhead according to claim 10 wherein each printhead integrated circuit is bonded to its respective TAB film with a suitable adhesive, the TAB film being bonded to its respective ink distribution member.
13. An inkjet printhead according to claim 12 wherein the TAB films are positioned to define floors of respective ink chambers of the ink distribution member.