Ink supply structure for inkjet printhead

Details Ink supply structure for inkjet printhead Ink supply structure for inkjet printhead

2005-11-22

2005-11-22

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S065000, C347S094000

Reexamination Certificate

active

06966634

ABSTRACT:
A printhead includes a silicon substrate, a first barrier layer, a second barrier layer, and a nozzle plate. The silicon substrate has a plurality of thermal elements and a main ink supply channel, each of the thermal elements being in a firing chamber of the first barrier layer and in fluid communications with the main ink supply channel through ink channels. The top of each ink firing elements is aligned with a nozzle on the nozzle plate. To satisfy the need for high-frequency ink ejection, the second barrier layer is utilized to provide an auxiliary ink supply channel for increasing the ink supply speed. The ink channel between the main ink supply and the ink channel inlet is enlarged in the vertical direction so as to lower the pressure and thus increase the ink supply speed.

REFERENCES:
patent: 4882595 (1989-11-01), Trueba et al.
patent: 5198834 (1993-03-01), Childers et al.
patent: 5308442 (1994-05-01), Taub et al.
patent: 6499835 (2002-12-01), Chee et al.

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