Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2006-11-14
2006-11-14
Meier, Stephen (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S061000
Reexamination Certificate
active
07134743
ABSTRACT:
There is disclosed an ink jet printhead which has a plurality of nozzles3and a bubble forming chamber7corresponding to each nozzle respectively. At least one heater element10disposed in each bubble forming chamber7to heat a bubble forming liquid11to 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 heater element is a suspended beam mounted at its respective ends to laterally opposing portions of the bubble forming chamber. A suspended beam heater element mounted to opposing sides of the chamber forms a symmetrical bubble. This provides better control of the pressure pulse generated which in turn gives a more predictable trajectory for the ejected drop.
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Choi Han Samuel
Meier Stephen
Silverbrook Research Pty Ltd
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