Printhead unit cell incorporating suspended looped heater...

Details Printhead unit cell incorporating suspended looped heater... Printhead unit cell incorporating suspended looped heater...

2008-01-22

2008-12-30

Stephens, Juanita D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S062000, C347S056000

Reexamination Certificate

active

07469997

ABSTRACT:
The present invention relates to a unit cell of a printhead. The unit cell includes a multi-layer substrate defining an ink inlet. One or more side walls extend from the substrate around the ink inlet. A nozzle plate is supported by the side walls to define a chamber in fluid communication with the ink inlet. The nozzle plate defines an aperture through which ink in the chamber can be ejected. A looped and elongate heater element is suspended within the chamber. The heater element can be heated so that bubbles are generated in ink within the chamber and ink is ejected from the aperture.

REFERENCES:
patent: 4890126 (1989-12-01), Hotomi
patent: 4894664 (1990-01-01), Tsung Pan
patent: 5208606 (1993-05-01), Klein et al.
patent: 5300951 (1994-04-01), Yamazaki
patent: 5367324 (1994-11-01), Abe et al.
patent: 6019457 (2000-02-01), Silverbrook
patent: 6443558 (2002-09-01), Silverbrook
patent: 2004/0130597 (2004-07-01), Kim et al.
patent: 3918472 (1990-12-01), None
patent: 0882593 (1998-12-01), None

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