Method for ensuring consistent dot size in an inkjet printhead

Details Method for ensuring consistent dot size in an inkjet printhead Method for ensuring consistent dot size in an inkjet printhead

2007-03-06

2007-03-06

Grant, II, Jerome (Department: 2626)

Facsimile and static presentation processing

Static presentation processing

Plotter

C358S001800, C347S011000, C347S020000, C347S055000, C347S060000

Reexamination Certificate

active

10992716

ABSTRACT:
A problem that occurs with inkjet printers having a microelectromechanical thermal inkjet printhead is that the dot print size during the initial operation of the printer is inconsistent with the dot print size produced after the printer has reached an equilibrium temperature. In order to address this problem a method is described that involves applying a number of heating pulses to nozzles of the printhead before commencing a print job. The heating pulses are of sufficient duration to warm ink within the nozzles but are limited so that they do not cause ink ejection.

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