Ink jet printing apparatus

Details Ink jet printing apparatus Ink jet printing apparatus

2007-07-24

2007-07-24

Meier, Stephen (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S068000

Reexamination Certificate

active

10820079

ABSTRACT:
An ink jet printing apparatus including an ink jet head including an ink ejecting portion and an ejection-energy generating portion operable to eject ink droplets from the ink ejecting portion, a purging device operable to discharge the ink from the ink ejecting portion, without an operation of the ejection-energy generating portion, for thereby performing a purging operation to improve an ink ejecting state of the ink jet head, and a controller operable to control the purging device for performing the purging operation, and to control the ejection-energy generating portion for performing a flushing operation to discharge the ink from the ink ejecting portion to improve the ink ejecting state. The controller includes a flushing control portion operable to control the ejection-energy generating portion such that ink ejecting actions in the flushing operation are performed in a plurality of intermittent cycles, with a non-ejection pause being inserted between two successive ones of the intermittent cycles. The non-ejection pause has a time duration longer than a period of each ink ejecting action.

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