Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2006-04-18
2006-04-18
Pham, Hai (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S036000, C347S023000
Reexamination Certificate
active
07029095
ABSTRACT:
The present invention provides an ink jet printing apparatus and a preliminary ejecting method. In both a full-line and a serial printer, the amount of ink passing through nozzles of print heads is sometimes decreased below a normal value before and during actual printing, In the printer of present invention, a preliminary ejecting operation is performed taking the opportunity in which the amount of ink passing through nozzles is decreased below a normal value. Then, the amount of ink passing through nozzles recovers to the normal value at an ink ejection after the preliminary ejecting operation. Since only a small amount of ink is ejected through the nozzles during the preliminary ejection operation, dots formed on a print sheet are not noticeable. Further, it is unnecessary to move the print heads to a home position where an ejection recovering process is executed to remove ink having an increase viscosity.
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Fujimoto Yasunori
Koitabashi Noribumi
Shirota Katsuhiro
Tsuboi Hitoshi
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Nguyen Lam S.
Pham Hai
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