Ink-jet printing head in which each passage between pressure...

Details Ink-jet printing head in which each passage between pressure... Ink-jet printing head in which each passage between pressure...

2006-10-24

2006-10-24

Hsieh, Shih-Wen (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S047000, C347S063000

Reexamination Certificate

active

07125097

ABSTRACT:
An ink-jet printing head including a cavity unit and an actuator superposed on each other. The cavity unit is provided by a plurality of plates superposed on each other in a vertical direction of the cavity unit, and has (a) a plurality of nozzles arranged in at least one row, (b) a plurality of pressure chambers arranged in a direction of the above-described at least one row of the nozzles, and (c) a plurality of communication passages for communication between the respective pressure chambers and the respective nozzles. The pressure chambers are arranged with a first spacing pitch between each adjacent pair of the pressure chambers, except at least one adjacent pair of the pressure chambers which are spaced apart from each other by a second spacing pitch that is larger than the first spacing pitch. Each of the communication passages includes at least one horizontally extending portion which extends in parallel with a horizontal direction of the cavity unit.

REFERENCES:
patent: 5489930 (1996-02-01), Anderson
patent: 2002/0024567 (2002-02-01), Takagi
patent: 600743 (1994-06-01), None
patent: 7-195685 (1995-08-01), None
patent: 2002-36545 (2002-02-01), None
patent: 2002-59547 (2002-02-01), None

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