On-demand type ink jet print head

Details On-demand type ink jet print head On-demand type ink jet print head

1989-12-06

1991-12-10

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

29 2535, 310331, B41J 2045

Patent

active

050722409

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.

REFERENCES:
patent: 4072959 (1978-02-01), Elmqvist
patent: 4633121 (1986-12-01), Ogawa
patent: 4768266 (1988-09-01), DeYoung

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