Thermal inkjet printhead temperature control

Details Thermal inkjet printhead temperature control Thermal inkjet printhead temperature control

1987-07-23

1988-12-13

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346139R, 400 54, G01D 1524

Patent

active

047914351

ABSTRACT:
Thermal inkjet printhead temperature control is provided in a temperature control system responsive to printhead temperature, which in the presence of printhead overheating selectively causes the printhead to stand idle, or, if multiple nozzles are available, shifts to a nozzle which, is not overheated, which in the event a nozzle is unused for some time and the dye transport agent may have evaporated leaving a viscous plug in the nozzle, employs warm up pulsing and/or nozzle spitting to clear the nozzles, and which when the temperatures of the nozzle is below acceptable printing temperatures, employs nozzle pulsing for warm up and/or nozzle spitting to clear the nozzles, all such decisions and actions being provided in advance of beginning a printing operation.

REFERENCES:
patent: 4496824 (1985-01-01), Kawai
patent: 4544931 (1985-10-01), Watanabe
patent: 4590488 (1986-05-01), Sullivan
patent: 4664542 (1987-05-01), Tsugita
patent: 4668965 (1987-05-01), Tanaka
patent: 4692777 (1987-09-01), Hasumi
patent: 4704620 (1987-11-01), Ichihashi
Ruddy, G. A.; Viscosity Control Circuit; IBM TDB, vol. 16, No. 10, Mar. 1974, pp. 3295.

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