Thermal ink jet printer utilizing a printhead resistor having a

Details Thermal ink jet printer utilizing a printhead resistor having a Thermal ink jet printer utilizing a printhead resistor having a

1982-11-22

1985-04-30

Tarcza, Thomas H.

Recorders

Markers and/or driving means therefor

With ink supply to marker

338126, G01D 1516

Patent

active

045147418

ABSTRACT:
A thermal ink jet printer utilizes a printhead resistor which has a central conductive region to excite bubble growth and to cause ejection of ink droplets. The existence of the central conductive region causes bubbles to be created which are toroidal in shape and which fragment during collapse, thereby randomly distributing the resultant acoustic shock across the surface of the printhead resistor and minimizing cavitation damage.

REFERENCES:
patent: 1381093 (1921-06-01), Teegarden
Condensed Chem Dictionary, Hawley, 1977, p. 420.

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