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:
Dec. 20, 2011
Filed:
Jul. 03, 2008
Kiichiro Takahashi, Kawasaki, JP;
Naoiji Otsuka, Yokohama, JP;
Osamu Iwasaki, Tokyo, JP;
Minoru Teshigawara, Yokohama, JP;
Tetsuya Edamura, Kawasaki, JP;
Yoshinori Nakagawa, Kawasaki, JP;
Satoshi Seki, Kawasaki, JP;
Naomi Oshio, Kawasaki, JP;
Kiichiro Takahashi, Kawasaki, JP;
Naoiji Otsuka, Yokohama, JP;
Osamu Iwasaki, Tokyo, JP;
Minoru Teshigawara, Yokohama, JP;
Tetsuya Edamura, Kawasaki, JP;
Yoshinori Nakagawa, Kawasaki, JP;
Satoshi Seki, Kawasaki, JP;
Naomi Oshio, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
For a serial color ink jet printing apparatus that forms an image using a symmetric printing head that ejects large dots and small dots, the configuration of a printing head is provided for suppressing, to the extent possible, a cyclic fluctuation in the main scanning direction. According to the present invention, individual nozzle arrays are arranged so that two nozzle arrays, i.e., a cyan nozzle array cand a magenta nozzle array m, that are located nearer each other, form dots on adjacent scan lines. With this arrangement, a high quality image, having neither an uneven density nor an uneven color, can be formed when a printing head is inclined, or when a cyclic shift in printing positions occurs, depending on the position of the main scanning direction.