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. 10, 2012
Filed:
Jun. 19, 2009
Yasuhisa Ehara, Kanagawa, JP;
Noriaki Funamoto, Tokyo, JP;
Jun Yasuda, Chiba, JP;
Tetsuji Nishikawa, Tokyo, JP;
Yasuhiro Maehata, Kanagawa, JP;
Yasuhisa Ehara, Kanagawa, JP;
Noriaki Funamoto, Tokyo, JP;
Jun Yasuda, Chiba, JP;
Tetsuji Nishikawa, Tokyo, JP;
Yasuhiro Maehata, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A driving motor for a color black is shared between a photosensitive body for the color black and a driving roller that drives an intermediate transfer belt not shown. Furthermore, a driving motor for colors yellow, magenta, and cyan is shared between photosensitive bodies for the colors yellow, magenta, and cyan. Driving of the driving motor for the colors yellow, magenta, and cyan is controlled based on a first waveform as a speed fluctuation waveform of the photosensitive body for the color black obtained when the driving motor for the color black is driven at a predetermined speed and second waveforms as speed fluctuation waveforms of the photosensitive bodies for the colors yellow, magenta, and cyan obtained when the driving motor for the colors yellow, magenta, and cyan is driven at a predetermined speed.