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:
Feb. 05, 2013
Filed:
Oct. 06, 2010
Jun Kosako, Kanagawa, JP;
Shigeyuki Ishii, Tokyo, JP;
Takashi Enami, Kanagawa, JP;
Nobuyuki Kobayashi, Kanagawa, JP;
Natsuko Kawase, Kanagawa, JP;
Takahiro Kamekura, Kanagawa, JP;
Takahiro Miyakawa, Kanagawa, JP;
Miyo Taniguchi, Kanagawa, JP;
Jun Kosako, Kanagawa, JP;
Shigeyuki Ishii, Tokyo, JP;
Takashi Enami, Kanagawa, JP;
Nobuyuki Kobayashi, Kanagawa, JP;
Natsuko Kawase, Kanagawa, JP;
Takahiro Kamekura, Kanagawa, JP;
Takahiro Miyakawa, Kanagawa, JP;
Miyo Taniguchi, Kanagawa, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
An image forming apparatus includes: a transfer-sheet conveying member that rotates to convey a transfer sheet; a first image forming unit that directly transfers a color image onto the transfer sheet; an intermediate transfer member that rotates while an image is transferred thereon; a second image forming unit that transfers images onto the intermediate transfer member; a secondary transfer unit that transfers the images on the intermediate transfer member onto the transfer sheet; a measuring unit that measures a surface velocity of the transfer-sheet conveying member and the intermediate transfer member; and a control unit that performs phase matching control by accelerating or decelerating the transfer-sheet conveying member or the intermediate transfer member so as to match a phase of fluctuation of the measured surface velocity of the transfer-sheet conveying member and a phase of fluctuation of the measured surface velocity of the intermediate transfer member.