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:
Aug. 30, 2011
Filed:
Jan. 10, 2008
Noriaki Funamoto, Machida, JP;
Joh Ebara, Kamakura, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Keisuke Sugiyama, Yokohama, JP;
Toshiyuki Uchida, Kawasaki, JP;
Yasuhisa Ehara, Kamakura, JP;
Noriaki Funamoto, Machida, JP;
Joh Ebara, Kamakura, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Keisuke Sugiyama, Yokohama, JP;
Toshiyuki Uchida, Kawasaki, JP;
Yasuhisa Ehara, Kamakura, JP;
Ricoh Company Limited, Tokyo, JP;
Abstract
An image forming apparatus that includes a plurality of image bearing members, a plurality of drive sources each including a drive gear, a plurality of driven gears, a visible image forming unit, an endless traveling member, a transfer unit, an image detection unit, and a controller. The controller controls rotation of the plurality of image bearing members according to a velocity fluctuation pattern of each surface of the image bearing members based on a detection time interval between predetermined visible detection images formed on the surface of the image bearing member and transferred therefrom to the endless traveling member detected by the image detection unit. Each of the plurality of driven gears includes a gear portion and an engaging portion integrated therewith. The gear portion includes a geared circumference and the engaging portion engages the image bearing member.