Actuator for ink jet printer

Details Actuator for ink jet printer Actuator for ink jet printer

1997-09-22

2000-06-06

Barlow, John

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 54, B41J 2045

Patent

active

060709715

ABSTRACT:
An actuator for an ink jet printer includes: an ink tank comprising a thick substrate having a cavity structure and a vibrating plate covering a cavity; and a piezoelectric/electrostrictive working portion comprising an upper electrode layer, a lower electrode layer, and a piezoelectric/electrostrictive layer between the electrode layers, the piezoelectric/electrostrictive working portion being disposed on the ink tank so that the lower electrode layer contacts with the vibrating plate. The upper electrode is trimmed only in the portion where the piezoelectric/electro-strictive layer covers the vibrating plate so as to control an effective electrode area and adjust an ink jet volume to be appropriate. The upper electrode layer is trimmed with the piezoelectric/electrostrictive layer covering the vibrating plate at least near the portion to be trimmed of the upper electrode layer so as to control an effective electrode area and adjust an ink jet volume.

REFERENCES:
patent: 3739299 (1973-06-01), Adler
patent: 5719607 (1998-02-01), Hasegawa et al.
Patent Abstracts Of Japan; vol. 7, No. 25 (M-190) '1170!; Feb. 2, 1983 & JP 57 181873 A (T. Oohori); Nov. 9, 1982 *abstract*.
Patent Abstracts Of Japan; vol. 7, No. 25 (M-190) '1170!; Feb. 2, 1983 & JP 57 181874 A (T. Oohori); Nov. 9, 1982 *abstract*.
Patent Abstracts Of Japan; vol. 7, No. 47 (M-196); Feb. 24, 1983 & JP 57 197175 A (Masaru Inoue; Dec. 3, 1982 *abstract*.
Patent Abstracts Of Japan; vol. 11, No. 196 (M-601) '2643!; Jun. 24, 1987 & JP 62 019465 A (T. Isayama); Jan. 28, 1987 *abstract*.

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