Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2006-12-12
2006-12-12
Meier, Stephen (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
Reexamination Certificate
active
07147308
ABSTRACT:
There is disclosed an ink jet printhead which comprises a plurality of nozzles3and 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 heater elements are supported within the bubble chambers7by the electrodes15such that they do not contact the interior walls of the chamber7. Supporting the heater elements10by their electrodes15avoids the unnecessary heating of the solid structure of the bubble forming chamber. This reduces energy dissipation into the substrate to enhance printhead efficiency. This improves the energy efficiency and reduces the cooling requirements of the printhead.
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The Fabrication and Reliability Testing of Ti/TiN Heaters, P. DeMoor, Proceedings of SPIE, Micromachining and Microfabrication Process Technology V, vol. 3874, pp. 284-294. Please note, this document was provided in co-pending U.S. Appl. No. 10/303,348.
Examiner's amendment from U.S. Appl. No. 10/302,617.
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No affiliations
Meier Stephen
Mruk Geoffrey S.
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