Printhead integrated circuit having heater elements with...

Details Printhead integrated circuit having heater elements with... Printhead integrated circuit having heater elements with...

2006-09-05

2006-09-05

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S054000

Reexamination Certificate

active

07101025

ABSTRACT:
There is disclosed an inkjet printhead integrated which comprises drive circuitry, a plurality of nozzles and one or more heater elements corresponding to each nozzle. Each heater element is configured to heat a bubble forming liquid in the printhead to a temperature above its boiling point to form a gas bubble therein. The generation of the bubble causes the ejection of a drop of an ejectable liquid (such as ink) through respective corresponding nozzle, to effect printing. Each heater element has a surface area to volume ratio greater than 4:1. This configuration ensures that heat is quickly transferred from the elements to the ink for efficient operation and minimal heating of the printhead substrate.

REFERENCES:
patent: 4827294 (1989-05-01), Hanson
patent: 4965594 (1990-10-01), Komuro
patent: 5479196 (1995-12-01), Inada
patent: 5534898 (1996-07-01), Kashino et al.
patent: 5706041 (1998-01-01), Kubby
patent: 5841452 (1998-11-01), Silverbrook
patent: 6019457 (2000-02-01), Silverbrook
patent: 6039425 (2000-03-01), Sekiya et al.
patent: 6543879 (2003-04-01), Feinn et al.
patent: 641654 (1997-07-01), None
patent: 1138494 (2001-10-01), None
patent: 811489 (2002-05-01), None
patent: 1211072 (2002-06-01), None
patent: WO 2001/66357 (2001-09-01), None

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