Stable substrate structure for a wide swath nozzle array in a high resolution inkjet printer
First Claim
1. A printhead having an array of ink nozzles aligned respectively over a plurality of firing chambers, comprising:
- a substrate including end portions with one or more columns of firing chambers located on said substrate between said end portions, with said firing chambers extending in a longitudinal direction along at least one outer edge of said substrate and spaced less than 1/500th of an inch apart in said longitudinal direction so as to eject droplets of ink on a medium at a dots per inch resolution of less than 1/500th of an inch in said longitudinal direction as said printhead scans across said medium in a direction perpendicular to said longitudinal direction;
ink channel means connecting an ink reservoir with said firing chambers, for passing ink from an underside of said substrate around an outer edge of said substrate to said firing chambers; and
a support structure for supporting said substrate in a fixed position.
3 Assignments
0 Petitions
Accused Products
Abstract
An inkjet printhead includes a compact substrate of increased stability and structural integrity to provide a high resolution 600 dot-per-inch nozzle array having a one-half inch swath. A plurality of ink vaporization chambers are respectively aligned with the nozzles in two longitudinal columns, one column extending longitudinally along one edge of the substrate and a second column extending longitudinally along an opposite edge of the substrate, with ink feed channels communicating through an ink passage from an underside of the substrate around both edges of the substrate to the vaporization chambers. The ink feed channels have thereby been eliminated from the central portion of the substrate, and replaced by the ink feed channels at the edges of the substrate.
58 Citations
18 Claims
-
1. A printhead having an array of ink nozzles aligned respectively over a plurality of firing chambers, comprising:
-
a substrate including end portions with one or more columns of firing chambers located on said substrate between said end portions, with said firing chambers extending in a longitudinal direction along at least one outer edge of said substrate and spaced less than 1/500th of an inch apart in said longitudinal direction so as to eject droplets of ink on a medium at a dots per inch resolution of less than 1/500th of an inch in said longitudinal direction as said printhead scans across said medium in a direction perpendicular to said longitudinal direction; ink channel means connecting an ink reservoir with said firing chambers, for passing ink from an underside of said substrate around an outer edge of said substrate to said firing chambers; and a support structure for supporting said substrate in a fixed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. An inkjet printer comprising:
-
a frame; a carriage for traversing across a print zone; a print cartridge removably mounted in said carriage, and including an array of ink nozzles which provide a predetermined swath width; a substrate supported on said print cartridge in a fixed position, and including end portions with a first column of firing chambers and a second column of firing chambers located on said substrate between said end portions, with said firing chambers extending in a longitudinal direction along at least one outer edge of said substrate and spaced less than 1/500th of an inch apart in said longitudinal direction so as to eject droplets of ink on a medium at a dots per inch resolution of less than 1/500th of an inch in said longitudinal direction as said printhead scans across said medium in a direction perpendicular to said longitudinal direction; ink channel means connecting an ink reservoir with said firing chambers, for passing ink from an underside of said substrate around an outer edge of said substrate to said firing chambers; and wherein said substrate includes a central interior portion located between said end portions as well as between said first column of firing chambers and said second column of firing chambers, said central interior portion excluding said ink channel means. - View Dependent Claims (17, 18)
-
Specification