Liquid ejection head

Details Liquid ejection head Liquid ejection head

2006-11-28

2006-11-28

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

By electric transducer

C347S071000, C347S072000

Reexamination Certificate

active

07140554

ABSTRACT:
In order to provide a liquid ejection head which enables ejection of a droplet at a higher frequency, according to the invention, a piezoelectric vibrator18has a multilayer structure. In the multilayer structure, an upper piezoelectric layer24and a lower piezoelectric layer25are laminated one on another. A drive electrode23is formed at a boundary between the upper piezoelectric layer24and the lower piezoelectric layer25and is electrically connected to a source for supplying a drive signal. An upper common electrode26is formed on the surface of the upper piezoelectric layer24. A lower common electrode27is formed on the surface of the lower piezoelectric layer25. An inertance of a nozzle orifice10and an inertance of an ink supply port5are set so as to become greater than an inertance of a pressure generating portion6, 13, 16.

REFERENCES:
patent: 5754204 (1998-05-01), Kitahara
patent: 6796637 (2004-09-01), Kitagawa et al.
patent: 6997547 (2006-02-01), Junhua
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patent: 11-320889 (1999-11-01), None
patent: 2000-117972 (2000-04-01), None
patent: 2000-218787 (2000-08-01), None

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