The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 1991
Filed:
Dec. 06, 1989
Yoshinori Miyazawa, Suwa, JP;
Hidenori Omae, Suwa, JP;
Masanao Matsuzawa, Suwa, JP;
Hisashi Miyazawa, Suwa, JP;
Takahiro Katakura, Suwa, JP;
Osamu Nakamura, Suwa, JP;
Norihiko Kurashima, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An on-demand type ink jet print head including a drive assembly formed from a vibrating plate formed of a piezoelectric layer with an electrode layer on one surface and an electrically conductive, physically resilient layer on the opposite surface of the piezoelectric layer. The vibrating plate is secured to a base and has two opposing edges defining a free space therebetween. The vibrating plate is slit into a plurality of strips and these strips are cross-slit in the widthwise direction to form a row of reed pieces secured to each opposing edge of the base in a cantilever configuration and extending into the free space from each edge toward the reed pieces extending from the opposite edge with a space therebetween. The reed pieces are electrically and mechanically independent of each other and have negligible electrical and mechanical interference with each other. Selective application of an electric field to the piezoelectric layer causes the reed pieces to deflect and jet ink from the print head onto a recording medium.