Thermal inkjet pen temperature control

Details Thermal inkjet pen temperature control Thermal inkjet pen temperature control

B - Operations, Transporting

41

J

101/96.022

B41J 2/01 (2006.01) B41J 2/05 (2006.01)

Patent

CA 1308956

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 temperature of the nozzle is below acceptable printing temperatures, 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.

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