Ink jet head with a deformable piezoelectric vibrating plate

Details Ink jet head with a deformable piezoelectric vibrating plate Ink jet head with a deformable piezoelectric vibrating plate

1995-02-07

1998-06-09

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 94, B41J 2045

Patent

active

057642559

ABSTRACT:
An ink jet head includes an orifice plate having a plurality of orifices disposed transversely at prescribed intervals, a vibrating plate disposed parallel to orifice plate and deformed by applying a potential difference perpendicularly to the direction of polarization, and a plurality of partitions disposed between orifice plate and vibrating plate in the space between adjacent orifices, and the space surrounded by orifice, vibrating plate and partition defines a pressure chamber to be filled with ink. Vibrating plate is provided with a groove having a rectangular cross section in a region having relatively low field intensity when signal voltage is applied. In this structure, the electric capacitance of vibrating plate is reduced without adversely affecting the electric field intensity, and the efficiency of deformation of vibrating plate is increased.

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Patent Abstracts of Japan, Dec. 1991, JP-3-284950, (Ricoh Co Ltd).
Patent Abstracts of Japan, Jan. 1992, JP-4-28557, (Fujitsu Ltd).

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