Ink-jet printing apparatus, control method therefor,...

Details Ink-jet printing apparatus, control method therefor,... Ink-jet printing apparatus, control method therefor,...

2006-04-04

2008-11-04

Hsieh, Shih-wen (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S029000, C347S030000, C347S032000

Reexamination Certificate

active

07445309

ABSTRACT:
An object of this invention is to prevent prolongation of the time taken for a suction recovery operation while suppressing wasteful consumption of ink in the suction recovery operation. An ink-jet printing apparatus includes a plurality of caps which, when a plurality of nozzles of an ink-jet head are divided into a plurality of nozzle groups, are arranged one by one for the respective nozzle groups, and cap the respective nozzle groups, a suction pump which generates a negative pressure in the plurality of caps to suck ink from the plurality of nozzles, and is arranged commonly for the plurality of caps, and a control unit which controls the suction pump so as to make the negative pressure by the suction pump act on all the caps when a common negative pressure is generated in the plurality of caps, and make different negative pressures by the suction pump act sequentially on the plurality of caps when different negative pressures are generated in the respective caps.

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