Inkjet printing apparatus

Details Inkjet printing apparatus Inkjet printing apparatus

2011-04-26

2011-04-26

Lepisto, Ryan (Department: 2883)

Incremental printing of symbolic information

Ink jet

Controller

C347S005000, C347S008000, C347S016000, C347S020000, C347S037000, C347S039000, C347S101000, C347S104000, C347S107000

Reexamination Certificate

active

07931348

ABSTRACT:
In an inkjet printing apparatus, uneven density is reduced while suppressing a landing position deviation caused by a difference of head-to-medium distances in a printing medium conveying direction. Specifically, predetermined patterns for detecting a difference of the head-to-medium distances are printed. Reading of the patterns is performed and then a detection of a difference between the head-to-medium distances is performed based on the reading result. Then, adjustment of the head-to-medium distance is performed based on the difference between the head-to-medium distances detected. Specifically, the respective head-to-medium distances at the upstream side ejection port and the downstream side ejection port are made equal by changing an attitude of the print head.

REFERENCES:
patent: 6092939 (2000-07-01), Nishikori et al.
patent: 2004/0150703 (2004-08-01), Nojima et al.
patent: 2007/0024663 (2007-02-01), Yamanobe
patent: 2007/0047157 (2007-03-01), Miyahara et al.
patent: 2008/0007587 (2008-01-01), Watanabe
patent: 10-329381 (1998-12-01), None

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