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:
Mar. 08, 2011
Filed:
May. 18, 2007
Takeshi Yazawa, Yokohama, JP;
Hitoshi Nishikori, Inagi, JP;
Daisaku Ide, Tokyo, JP;
Jun Yasutani, Kawasaki, JP;
Hirokazu Kameda, Kawasaki, JP;
Manabu Kanazawa, Yokohama, JP;
Fumiko Yano, Tokyo, JP;
Takeshi Yazawa, Yokohama, JP;
Hitoshi Nishikori, Inagi, JP;
Daisaku Ide, Tokyo, JP;
Jun Yasutani, Kawasaki, JP;
Hirokazu Kameda, Kawasaki, JP;
Manabu Kanazawa, Yokohama, JP;
Fumiko Yano, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
By suppressing deviation of dot-formation positions stemming from insufficient accuracy in conveying a printing medium due to eccentricity of a conveying roller, a printed image in which unevenness is less visible is obtained. An accumulated amount of conveyance errors is reduced by narrowing a nozzle-use range and by reducing a conveyance amount over an entire printing region according to the number of colors to be used and desired printing quality in printing an image. Moreover, the nozzles used when the nozzle-use range is narrowed are not fixed, and are switched to be used as appropriate. This prevents only certain nozzles from being used concentratedly, and allows all of the nozzles to maintain substantially the same ejection performance.