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:
Sep. 22, 2015
Filed:
Mar. 01, 2013
Akinori Yamaguchi, Osaka, JP;
Masayuki Hayashi, Osaka, JP;
Hiroaki Ikeda, Osaka, JP;
Kunihiro Komai, Osaka, JP;
Tatsuya Miyadera, Osaka, JP;
Takeshi Shikama, Osaka, JP;
Takuhei Yokoyama, Osaka, JP;
Yoshinori Shirasaki, Osaka, JP;
Motohiro Kawanabe, Osaka, JP;
Akinori Yamaguchi, Osaka, JP;
Masayuki Hayashi, Osaka, JP;
Hiroaki Ikeda, Osaka, JP;
Kunihiro Komai, Osaka, JP;
Tatsuya Miyadera, Osaka, JP;
Takeshi Shikama, Osaka, JP;
Takuhei Yokoyama, Osaka, JP;
Yoshinori Shirasaki, Osaka, JP;
Motohiro Kawanabe, Osaka, JP;
RICOH COMPANY, LIMITED, Tokyo, JP;
Abstract
In the invention, an inclination amount of sensors is reflected in positional deviation correction patterns, and for correcting formation positions of images of various colors, the positional deviation correction patterns are formed on a conveying belt. The positional deviation correction patterns are detected by the sensors. A control unit calculates positional deviation correction amounts based on detection results of the positional deviation correction patterns. Based on the calculated positional deviation correction amounts, the control unit performs calculation for correcting the positional deviation correction patterns, and cancels the inclination amount reflected in the calculation results to obtain final positional deviation correction amounts. Skew correction is performed based on the final positional deviation correction amounts, and thus, the positional deviations are corrected.