Ink jet printing apparatus and control method for reducing...

Details Ink jet printing apparatus and control method for reducing... Ink jet printing apparatus and control method for reducing...

2008-11-13

2010-12-07

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S012000, C347S040000

Reexamination Certificate

active

07845761

ABSTRACT:
In an ink jet printing apparatus, preliminary ejection for a print head involving a plurality of distances from a common ink supply port to respective ejection openings is optimized. Specifically, for a first nozzle array and a second nozzle array with different distances from the ink supply port to the ejection opening, the ratio of a driving pulse width to a lower limit pulse width for the second nozzle array with the longer distance is set to be higher than the ratio for the first nozzle array with the shorter distance. This enables a reduction in the time required for preliminary ejection of the apparatus as a whole.

REFERENCES:
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patent: 5701146 (1997-12-01), Akiyama et al.
patent: 2007/0057984 (2007-03-01), Takamiya et al.
patent: 2008/0239007 (2008-10-01), Tomizawa et al.
patent: 6-246931 (1994-09-01), None
patent: 2004-90292 (2004-03-01), None
U.S. Appl. No. 12/273,138, filed Nov. 18, 2008.
U.S. Appl. No. 12/364,795, filed Feb. 3, 2009.

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