Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2007-02-27
2007-02-27
Meier, Stephen (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S062000
Reexamination Certificate
active
10773197
ABSTRACT:
There is disclosed an ink jet printhead having 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 gas bubble collapses to a collapse point17spaced from the heater element10,and the heater element has two planes of symmetry intersecting along the nozzle axis. A heater element with two planes of symmetry intersecting along the nozzle axis will generate a symmetrical bubble centrally aligned with the aperture. This gives the nozzle an ejected drop trajectory along the nozzle axis. Configuring the heater element with two planes of symmetry and a void at the bubble collapse point gives the nozzle a trajectory that is directly along its axis as well as avoiding the corrosive problems associated with cavitation.
REFERENCES:
patent: 4549191 (1985-10-01), Fukuchi et al.
patent: 4797692 (1989-01-01), Ims
patent: 4827294 (1989-05-01), Hanson
patent: 4894664 (1990-01-01), Tsung Pan
patent: 4931813 (1990-06-01), Pan et al.
patent: 4965594 (1990-10-01), Komuro
patent: 4982199 (1991-01-01), Dunn
patent: 5534898 (1996-07-01), Kashino et al.
patent: 5706041 (1998-01-01), Kubby
patent: 5710070 (1998-01-01), Chan
patent: 5831648 (1998-11-01), Mitani et al.
patent: 5841452 (1998-11-01), Silverbrook
patent: 5856836 (1999-01-01), Silverbrook
patent: 5905517 (1999-05-01), Silverbrook
patent: 6447104 (2002-09-01), Keil et al.
patent: 6543879 (2003-04-01), Feinn et al.
patent: 2004/0160489 (2004-08-01), Silverbrook
patent: 1211072 (2002-06-01), None
patent: WO 01/66357 (2001-09-01), None
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 copending U.S. Appl. No. 10/303,348.
Dymetman, M., and Copperman, M., “Intelligent Paper in Electronic Publishing, Artist Imaging, and Digital Typography, Proceedings of EP '98”, Mar./Apr. 1998, Springer Verlag LNCS 1375, pp. 392-406.
Shamilian, John H., Baird, Henry S., & Wood, Thomas L. “A Retargetable Table Reader”, Bell Laboratories, Lucent Tech Inc. Crawfords Corner Rd, Room 2F-217, Holmdel, NJ 07733-1988 USA.
Choi Han Samuel
Meier Stephen
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