Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2005-09-07
2008-08-05
Nguyen, Lam S (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S036000, C347S023000
Reexamination Certificate
active
07407258
ABSTRACT:
In an ink jet recording apparatus, it is detected whether or not an ejection has been performed at least one time while printing an image, with respect to each nozzle, within a predetermined period (preliminary on-paper ejection cycle corresponding to the checking area C1), and the nozzle which has performed the ejection at least one time is excluded from a target of preliminary ejection within a second predetermined period (preliminary on-paper ejection cycle corresponding to the checking area C2) subsequent to the above predetermined period. As for the nozzle not excluded from the preliminary ejection target, the preliminary ejection is performed at least one time onto paper (preliminary on-paper ejection area R2) as to each nozzle at a predetermined timing within the second predetermined period (preliminary on-paper ejection cycle corresponding to the checking area C2). Accordingly, printing is not interrupted by a head recovery processing, and also unnecessary preliminary ejection can be reduced. In the case of a recording medium such as cardboard and envelope, which is processed after recording and changed in shape so as to functionate as desired, the preliminary ejection is performed onto a position defined according to the shape, for example, flap portion (206C), overlap portion (206A), and the like, without exceeding a predetermined density.
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Nakahara Yasunori
Sakurai Junichi
Canon Finetech Inc.
Nguyen Lam S
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