Piezo-driven micro-droplet jet generator

Details Piezo-driven micro-droplet jet generator Piezo-driven micro-droplet jet generator

2005-02-14

2008-08-05

Meier, Stephen D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S070000

Reexamination Certificate

active

07407273

ABSTRACT:
A piezo-driven micro-droplet jet generator comprises an ejection seat, having an ejection plate with a plurality of ejection holes; a membrane, having a front side facing the ejection seat and a rear side; a piezoelectric plate, placed at the rear side of the membrane, at least partly touching the membrane and, when electric voltage is applied, driving a vibrating movement of the membrane towards the ejection plate; a base plate, at four corners thereof fastened to the ejection seat and to the membrane; and a flow path inside the ejection seat, allowing liquid to be let into a space inside the ejection seat; wherein liquid between the membrane and the ejection plate upon the vibrating movement undergoes pressure, being ejected through the plurality of ejection holes.

REFERENCES:
patent: 5184155 (1993-02-01), Yonekubo et al.
patent: 6362844 (2002-03-01), Shieh et al.
patent: 6557985 (2003-05-01), Hosono et al.

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