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:
Jul. 19, 2016
Filed:
Apr. 23, 2014
Shinya Tanaka, Kanagawa, JP;
Hirokazu Ishii, Tokyo, JP;
Tsutomu Kato, Kanagawa, JP;
Yasufumi Takahashi, Kanagawa, JP;
Takehide Mizutani, Kanagawa, JP;
Osamu Ichihashi, Kanagawa, JP;
Yuji Kato, Kanagawa, JP;
Atsushi Nagata, Kanagawa, JP;
Kazuosa Kuma, Kanagawa, JP;
Ryo Hasegawa, Kanagawa, JP;
Haruki Nagata, Kanagawa, JP;
Naoto Kochi, Kanagawa, JP;
Shinya Tanaka, Kanagawa, JP;
Hirokazu Ishii, Tokyo, JP;
Tsutomu Kato, Kanagawa, JP;
Yasufumi Takahashi, Kanagawa, JP;
Takehide Mizutani, Kanagawa, JP;
Osamu Ichihashi, Kanagawa, JP;
Yuji Kato, Kanagawa, JP;
Atsushi Nagata, Kanagawa, JP;
Kazuosa Kuma, Kanagawa, JP;
Ryo Hasegawa, Kanagawa, JP;
Haruki Nagata, Kanagawa, JP;
Naoto Kochi, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
An image forming apparatus includes an image carrier that carries a toner image; a transfer member that forms a transfer nip between the transfer member and the image carrier; and a power supply capable of outputting a superimposed transfer bias in which an alternating current component is superimposed onto a direct current component. The toner image on the image carrier is transferred onto a recording medium in the transfer nip by the superimposed transfer bias or a direct current bias consisting of the direct current component output by the power supply. The apparatus also includes a controller that controls the power supply so that an output target value of the direct current component when the direct current component rises up is larger than an output target value of the direct current component when the toner image is transferred onto the recording medium.