The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2005
Filed:
Aug. 17, 2001
Noribumi Koitabashi, Yokohama, JP;
Jiro Moriyama, Kawasaki, JP;
Shigeyasu Nagoshi, Yokohama, JP;
Hiroshi Tajika, Yokohama, JP;
Fumihiro Gotoh, Kawasaki, JP;
Masao Kato, Yokohama, JP;
Noribumi Koitabashi, Yokohama, JP;
Jiro Moriyama, Kawasaki, JP;
Shigeyasu Nagoshi, Yokohama, JP;
Hiroshi Tajika, Yokohama, JP;
Fumihiro Gotoh, Kawasaki, JP;
Masao Kato, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an ink-jet apparatus employing an ink-jet head having a plurality of heaters corresponding to one ink ejection opening, appropriate preliminary ejection is performed per each ejection amount mode set by heater to be used among a plurality of heaters. Depending upon set printing mode (step S), printing is performed in one of large, medium and small ejection amount modes (steps S, S, S). For example, after printing is performed for a predetermined amount by the small ejection amount mode (step S), the preliminary ejection during printing, is performed in the medium ejection amount mode which is greater in ejection amount than the small ejection amount mode. By this, the interval of preliminary ejection during printing can be set longer to prevent lowering of throughput due to preliminary printing operation.