Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2007-02-06
2007-02-06
Meier, Stephen (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S061000
Reexamination Certificate
active
10773198
ABSTRACT:
There is disclosed an ink jet printhead that has a plurality of nozzles unit cells1and one or more heater elements10corresponding to each nozzle3. Each heater element10is configured to heat a bubble forming liquid11in the printhead to a temperature above its boiling point to form a gas bubble12therein. The generation of the bubble12causes the ejection of a drop16of an ejectable liquid (such as ink) through an ejection aperture5in each nozzle3, to effect printing. The gas bubble encircles at least some of the heater element. By configuring the heater element such that the bubbles formed surround the element, the heat transfer to the bubble forming liquid is maximized. Less heat is wasted through conduction to the surrounding nozzle structures thereby raising the overall efficiency of the printhead.
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McAvoy Gregory John
North Angus John
Silverbrook Kia
Choi Han Samuel
Meier Stephen
Silverbrook Research Pty Ltd
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