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. 01, 2017
Filed:
Sep. 14, 2016
Tatsuya Ohsugi, Kanagawa, JP;
Kenji Sugiura, Kanagawa, JP;
Jyunya Sakuraba, Kanagawa, JP;
Hirokazu Ishii, Tokyo, JP;
Toshitaka Yamaguchi, Kanagawa, JP;
Hiroyoshi Haga, Kanagawa, JP;
Naohiro Kumagai, Kanagawa, JP;
Seiichi Kogure, Kanagawa, JP;
Junpei Fujita, Kanagawa, JP;
Yuuji Wada, Kanagawa, JP;
Kazuki Yogosawa, Tokyo, JP;
Shinya Tanaka, Kanagawa, JP;
Masayoshi Nakayama, Kanagawa, JP;
Tatsuya Ohsugi, Kanagawa, JP;
Kenji Sugiura, Kanagawa, JP;
Jyunya Sakuraba, Kanagawa, JP;
Hirokazu Ishii, Tokyo, JP;
Toshitaka Yamaguchi, Kanagawa, JP;
Hiroyoshi Haga, Kanagawa, JP;
Naohiro Kumagai, Kanagawa, JP;
Seiichi Kogure, Kanagawa, JP;
Junpei Fujita, Kanagawa, JP;
Yuuji Wada, Kanagawa, JP;
Kazuki Yogosawa, Tokyo, JP;
Shinya Tanaka, Kanagawa, JP;
Masayoshi Nakayama, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image bearer, a transfer member, and a power source. The image bearer includes a plurality of layers. The transfer member forms a transfer nip between the image bearer and the transfer member. The power source outputs a transfer bias to transfer a toner image from the image bearer onto a recording sheet in the transfer nip. The transfer bias alternates between a transfer-side bias that causes the toner image to move from the image bearer to the recording sheet, and an opposite-side bias different from the transfer-side bias. A duty ratio of a time period, during which the opposite-side bias is output, relative to one cycle of a waveform, is greater than 50%.