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:
Apr. 29, 2014
Filed:
Mar. 05, 2012
Naomi Sugimoto, Kanagawa, JP;
Shinya Tanaka, Kanagawa, JP;
Haruo Iimura, Kanagawa, JP;
Shinji Aoki, Kanagawa, JP;
Yasuhiko Ogino, Kanagawa, JP;
Keigo Nakamura, Kanagawa, JP;
Naomi Sugimoto, Kanagawa, JP;
Shinya Tanaka, Kanagawa, JP;
Haruo Iimura, Kanagawa, JP;
Shinji Aoki, Kanagawa, JP;
Yasuhiko Ogino, Kanagawa, JP;
Keigo Nakamura, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image carrier to carry a toner image, a transfer member to form a transfer nip by contacting the image carrier surface, and a power supply to output a voltage to the recording material captured in the transfer nip so as to transfer the toner image formed on the image carrier surface. The voltage is switching alternately between a voltage in the transfer direction and a voltage opposite to the voltage in the transfer direction, and a time average value (Vave) of the voltage is set to have a polarity of the transfer direction, and is set to a value in the transfer voltage side, and a change mode to change a cycle of the voltage output from the power supply can be changed based on the toner deterioration information which determines the deterioration status of the toner.