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:
Jan. 01, 2013
Filed:
Sep. 03, 2010
Yasuhiro Maehata, Kanagawa, JP;
Yasuhisa Ehara, Kanagawa, JP;
Noriaki Funamoto, Tokyo, JP;
Tetsuji Nishikawa, Tokyo, JP;
Jun Yasuda, Chiba, JP;
Hiroaki Murakami, Kanagawa, JP;
Yasuhiro Maehata, Kanagawa, JP;
Yasuhisa Ehara, Kanagawa, JP;
Noriaki Funamoto, Tokyo, JP;
Tetsuji Nishikawa, Tokyo, JP;
Jun Yasuda, Chiba, JP;
Hiroaki Murakami, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A main controlling part is configured to choose and execute either a constant belt speed control which controls a driving motor (a driving source for an intermediate transfer belt) to move the intermediate transfer belt at a predetermined target belt speed or a constant motor speed control which rotates the driving motor at a predetermined target rotational speed according to a print command, and then, prior to a first-time print job, after executing a writing position correcting process while moving the intermediate transfer belt under the constant belt speed control, forms a color shift detecting image by switching from the constant belt speed control to the constant motor speed control, measures a difference between amounts of color shift, and executes a speed correcting process for correcting the target rotational speed of the driving motor in the constant motor speed control based on the measurement result.