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:
May. 07, 2019
Filed:
Feb. 08, 2017
Yuuji Wada, Kanagawa, JP;
Naoto Kochi, Tokyo, JP;
Hiroki Nakamatsu, Kanagawa, JP;
Kazuki Yogosawa, Kanagawa, JP;
Takahiro Suzuki, Tokyo, JP;
Shinya Tanaka, Kanagawa, JP;
Kenji Sugiura, Kanagawa, JP;
Naohiro Kumagai, Kanagawa, JP;
Seiichi Kogure, Kanagawa, JP;
Junpei Fujita, Kanagawa, JP;
Hirokazu Ishii, Tokyo, JP;
Takehide Mizutani, Tokyo, JP;
Atsushi Nagata, Kanagawa, JP;
Keigo Nakamura, Kanagawa, JP;
Yuuji Wada, Kanagawa, JP;
Naoto Kochi, Tokyo, JP;
Hiroki Nakamatsu, Kanagawa, JP;
Kazuki Yogosawa, Kanagawa, JP;
Takahiro Suzuki, Tokyo, JP;
Shinya Tanaka, Kanagawa, JP;
Kenji Sugiura, Kanagawa, JP;
Naohiro Kumagai, Kanagawa, JP;
Seiichi Kogure, Kanagawa, JP;
Junpei Fujita, Kanagawa, JP;
Hirokazu Ishii, Tokyo, JP;
Takehide Mizutani, Tokyo, JP;
Atsushi Nagata, Kanagawa, JP;
Keigo Nakamura, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An improved image forming apparatus includes an image bearer, a nip forming member, a transfer power source, and a controller. The controller switches a transfer mode between a first mode to transfer the toner image onto a first type sheet having a surface smoothness higher than a surface smoothness of a second type sheet and a second mode to transfer the toner image onto the second type sheet. The controller controls the transfer power source to output the transfer bias having an opposite-peak duty of greater than or equal to 50% that is a duty on the side of the opposite-peak value in the first mode. The controller controls the transfer power source to output the transfer bias having an opposite-peak duty of less than 50%, which is different from the opposite-peak duty of the first mode, in the second mode.