Ink jet printing apparatus

Incremental printing of symbolic information – Ink jet – Ejector mechanism

Reexamination Certificate

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Details

C347S023000

Reexamination Certificate

active

07121645

ABSTRACT:
When there are two kinds of caps that protect nozzle faces of print heads—a protective cap with no suction mechanism and a suction cap with a suction mechanism—and if a time during which the print heads are left idle is within a predetermined time, each print head protected by the protective cap performs 5,000 idle ejections during the idle ejection operation executed prior to initiating a printing operation. Each print head protected by the suction cap performs 100 idle ejections during the idle ejection operation. By setting the number of idle ejections for print heads protected by the protective caps to be greater, it is possible to keep all the print heads in good condition at all times whether they are protected by the suction caps or protective caps.

REFERENCES:
patent: 5896143 (1999-04-01), Matsui et al.
patent: 5903287 (1999-05-01), Ishikawa et al.
patent: 7-32599 (1995-02-01), None
U.S. Appl. No. 10/690,516, filed Oct. 23, 2003.

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