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. 08, 2009
Filed:
Jan. 25, 2007
Hiromichi Matsuda, Kanagawa-ken, JP;
Hiroshi Koide, Kanagawa-ken, JP;
Joh Ebara, Kanagawa-ken, JP;
Toshiyuki Andoh, Kanagawa-ken, JP;
Yasuhisa Ehara, Kanagawa-ken, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Yuji Matsuda, Tokyo, JP;
Hiromichi Matsuda, Kanagawa-ken, JP;
Hiroshi Koide, Kanagawa-ken, JP;
Joh Ebara, Kanagawa-ken, JP;
Toshiyuki Andoh, Kanagawa-ken, JP;
Yasuhisa Ehara, Kanagawa-ken, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Yuji Matsuda, Tokyo, JP;
Ricoh Co., Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a latent image carrier having a moving surface on which a latent image is formed, a drive control mechanism to control a drive of the latent image carrier so as to match a rotation angular speed of the latent image carrier with a target rotation angular speed thereof, a surface moving member having a moving surface on which an adjustment pattern for use in controlling the drive of the latent image carrier is formed, an image forming mechanism to develop the latent image with toner and transfer a resultant toner image on the surface moving member so as to form the adjustment pattern along a surface moving direction thereof, a pattern sensor to detect the adjustment pattern, a correction mechanism to correct the target rotation angular speed of the latent image carrier based on an amplitude and a phase of a variable component in a pattern interval of the adjustment pattern detected with the pattern sensor.