Bubble jet print head having improved resistive heater and elect

Details Bubble jet print head having improved resistive heater and elect Bubble jet print head having improved resistive heater and elect

1989-05-12

1990-08-07

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41J 205

Patent

active

049471899

ABSTRACT:
An improved heater/electrode construction for a bubble jet print head of the kind having discrete ink heater elements formed of electrically resistive material and a plurality of address electrode pairs formed of electrically conductive material and electrically contacting opposing edge regions of respective heater elements. The heater element resistance increases from its center outward and the electrode ends are spaced from the bubble formation region to provide, in a drop ejection condition, a flat slope temperature profile along the current flow path through the bubble formation zone.

REFERENCES:
patent: 4204107 (1980-05-01), Ohkubo et al.
patent: 4339762 (1982-07-01), Shirato et al.
patent: 4345262 (1982-08-01), Shirato
patent: 4413170 (1983-11-01), Val et al.
patent: 4514741 (1985-04-01), Meyer
patent: 4590489 (1986-05-01), Isumura et al.
patent: 4602261 (1986-07-01), Matsuda et al.
patent: 4679056 (1987-07-01), Kobayashi et al.
patent: 4719478 (1988-01-01), Lachihara et al.
patent: 4725859 (1988-02-01), Shibata
patent: 4792818 (1988-12-01), Eldridge

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