Metal working – Piezoelectric device making
Reexamination Certificate
2005-09-06
2005-09-06
Tugbang, A. Dexter (Department: 3729)
Metal working
Piezoelectric device making
C029S594000, C029S890100, C347S054000, C216S027000, C438S021000
Reexamination Certificate
active
06938310
ABSTRACT:
An inkjet print head comprises a mandrel having flat front and rear surfaces disposed between an initially curved rear membrane and an initially flat front membrane. The rear membrane is initially hemispherically curved, in close contact at its periphery with the rear surface of the mandrel but substantially removed from the mandrel in its central region. Because the membranes are mechanically coupled, the initially curved rear membrane causes the initially flat front membrane to bow away from the front surface of the mandrel. Ink contacts only one membrane, preferably the front membrane, which is typically held at a ground potential. By applying a voltage sequence to the membranes and mandrel, the position of the actuator may be controlled in a “push-pull” manner.
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DeBar Michael J.
Hawkins Gilbert A.
Eastman Kodak Company
Nguyen Tai Van
Sales Milton S.
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