Ink jet head and ink jet printer

Details Ink jet head and ink jet printer Ink jet head and ink jet printer

2007-09-18

2007-09-18

Do, An H. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S071000

Reexamination Certificate

active

10473674

ABSTRACT:
An ink-jet head includes a passage unit including a plurality of pressure chambers, and a plurality of actuator units attached to a surface of the passage unit for changing the volume of each of the plurality of pressure chambers. The actuator unit has a layered structure laminated with four piezoelectric sheets to. In the actuator unit, individual electrodes are formed at positions respectively corresponding to each of the pressure chambers, only on a face of the uppermost piezoelectric sheet opposite to an attached face of the actuator unit to the passage unit. A common electrode kept at a constant potential is provided on a face of the uppermost piezoelectric sheet at the side facing the passage unit.

REFERENCES:
patent: 5128694 (1992-07-01), Kanayama
patent: 5402159 (1995-03-01), Takahashi et al.
patent: 5912526 (1999-06-01), Okawa et al.
patent: 6174051 (2001-01-01), Sakaida
patent: 6431691 (2002-08-01), Tanikawa et al.
patent: 7008048 (2006-03-01), Sakaida
patent: A-10-058675 (1998-03-01), None
patent: A 11-034341 (1999-02-01), None
patent: A 2002-127420 (2002-05-01), None
patent: WO 99/42292 (1999-08-01), None

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