Liquid-droplet jetting apparatus

Details Liquid-droplet jetting apparatus Liquid-droplet jetting apparatus

2007-01-18

2009-10-27

Do, An H (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07607765

ABSTRACT:
A liquid-droplet jetting apparatus is provided with a cavity unit in which nozzles and pressure chambers are formed; and a piezoelectric actuator which includes active portions which deforms when a drive voltage is applied thereto. In the apparatus, the active portions are deformed to change the volume of the pressure chambers to thereby jet a liquid in the pressure chambers from the nozzles. The active portions are grouped into a plurality of groups which are different in the length in the longitudinal direction of the active portions. Active portions with a greater length have a greater width, and active portions with a smaller length have a smaller width. Accordingly, in the liquid-droplet jetting apparatus in which the active portions are grouped into the jetting groups, drive voltages can be made substantially same with respect to all the jetting groups.

REFERENCES:
patent: 5402159 (1995-03-01), Takahashi et al.
patent: 6595628 (2003-07-01), Takagi et al.
patent: 2002-254634 (2002-09-01), None
patent: 2004291543 (2004-10-01), None

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