Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2008-01-08
2008-01-08
Meier, Stephen (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
Reexamination Certificate
active
07316470
ABSTRACT:
An inkjet recording head for ejecting ink in ink channels by deformation of the piezoelectric element, comprising: a partition wall, formed by making grooves in an actuator substrate made of a polarized piezoelectric element, for forming longitudinal side surface of a plurality of ink channels; a cover plate adhered on an upper surface of the partition wall to form a top surface of the plurality of ink channels; a nozzle plate, adhered on a front side surface of the actuator substrate, having a nozzle hole for ejecting ink, wherein the cover plate is made of a machinable ceramics, which has a higher thermal conductivity than that of the piezoelectric element, and where Lc and Lp respectively represent the linear thermal expansion coefficient of the cover plate and the piezoelectric element, the relationship of, |Lc−Lp|≦5×10−6/° C. is satisfied, and a top plate having higher thermal conductivity than the cover plate is provided on the cover plate.
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Asano Kazuo
Komatsu Katsuaki
Nishi Shin-ichi
Cantor & Colburn LLP
Konica Corporation
Meier Stephen
Mruk Geoffrey S.
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