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:
Dec. 09, 2014
Filed:
Aug. 11, 2011
Shinji Aoki, Kanagawa, JP;
Haruo Iimura, Kanagawa, JP;
Yasuhiko Ogino, Kanagawa, JP;
Keigo Nakamura, Kanagawa, JP;
Masahide Nakaya, Kanagawa, JP;
Tomokazu Takeuchi, Tokyo, JP;
Shinji Aoki, Kanagawa, JP;
Haruo Iimura, Kanagawa, JP;
Yasuhiko Ogino, Kanagawa, JP;
Keigo Nakamura, Kanagawa, JP;
Masahide Nakaya, Kanagawa, JP;
Tomokazu Takeuchi, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a transfer bias generator including a transfer bias supply that supplies a transfer bias to a transfer nip formed between an image carrier and a first rotary body, and a controller that detects a toner adhesion amount at a predetermined region of the image carrier located immediately upstream from the transfer nip and having a predetermined length in a moving direction of the image carrier. The transfer bias generator outputs at least an alternating current component under one of constant voltage control and constant current control and changes a target output value of the alternating current component according to the toner adhesion amount detected by the controller.