Inkjet printhead for printing with low density keep-wet dots

Details Inkjet printhead for printing with low density keep-wet dots Inkjet printhead for printing with low density keep-wet dots

2007-07-24

2007-07-24

Nguyen, Lamson D. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S010000, C347S014000

Reexamination Certificate

active

11097335

ABSTRACT:
An inkjet printhead with a plurality of nozzles, a bubble forming chamber corresponding to each of the nozzles respectively, the bubble forming chambers adapted to contain ejectable liquid, a heater element positioned in each of the bubble forming chambers respectively for heating the ejectable liquid to form a gas bubble that causes the ejection of a drop of the ejectable liquid from the nozzle; and,a print engine controller for controlling the operation of the heater elements; wherein during use,the print engine controller heats the ejectable liquid with the heater element to lower its viscosity prior to a print job; andduring printing, the print engine controller ensures that the time interval between successive actuations of each of the heater elements is less than a predetermined time in which the viscosity of the ejectable liquid in the increases to a threshold.

REFERENCES:
patent: 6598960 (2003-07-01), Cabal et al.
patent: 6818959 (2004-11-01), Montelius et al.
patent: 7014292 (2006-03-01), Yazawa et al.
patent: 2002/0196305 (2002-12-01), Kanda et al.
patent: 2003/0016265 (2003-01-01), Harada et al.
patent: 2004/0001121 (2004-01-01), Kameda et al.
patent: 2004/0090495 (2004-05-01), Delametter et al.

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