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. 10, 2016
Filed:
Jun. 17, 2015
Naomi Sugimoto, Kanagawa, JP;
Shinya Tanaka, Kanagawa, JP;
Haruo Iimura, Kanagawa, JP;
Shinji Aoki, Osaka, JP;
Yasuhiko Ogino, Kanagawa, JP;
Keigo Nakamura, Kanagawa, JP;
Naomi Sugimoto, Kanagawa, JP;
Shinya Tanaka, Kanagawa, JP;
Haruo Iimura, Kanagawa, JP;
Shinji Aoki, Osaka, JP;
Yasuhiko Ogino, Kanagawa, JP;
Keigo Nakamura, Kanagawa, JP;
RICOH COMPANY, LIMITED, Tokyo, JP;
Abstract
According to an embodiment, provided is a transfer device including: a nip forming member that abuts against a surface of an image carrier carrying a toner image; and a transfer voltage application unit that applies a transfer voltage including a DC component and an AC component. The transfer voltage is an alternating voltage in which a supply voltage having polarity in a transfer direction and a return voltage having polarity opposite. A time average value Vave of the transfer voltage is set to be at polarity in the transfer direction and is set to be closer to a peak value Vt of the supply voltage relative to a center value Voff between a maximum and minimum value. An absolute value of the peak value Vr of the return voltage is set to be larger than an absolute value of the time average value Vave.