Ink jet printing head and its production method

Incremental printing of symbolic information – Ink jet – Ejector mechanism

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B41J 2135

Patent

active

061097284

ABSTRACT:
An ink jet printing head includes a nozzle plate having an outside surface and a plurality of nozzles for discharging ink from the outside surface, each nozzle having a first diameter at a peripheral edge of the nozzle plate. A surface treatment layer is provided on the outside surface of the nozzle plate, the surface treatment layer having a plurality of openings overlapping the plurality of nozzles, each opening having a second diameter at a peripheral edge of the surface treatment layer, the second diameter being smaller than the first diameter.

REFERENCES:
patent: 4528070 (1985-07-01), Gamblin
patent: 4733447 (1988-03-01), Ageishi
patent: 4947184 (1990-08-01), Moynihan
patent: 5443687 (1995-08-01), Koyama et al.
patent: 5759421 (1998-06-01), Takemoto et al.
patent: 5838347 (1998-11-01), Inamoto et al.

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