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:
Jun. 07, 2005
Filed:
Oct. 21, 2003
Masaaki Takahashi, Kanagawa, JP;
Keiji Yamamoto, Kanagawa, JP;
Satoru Torimaru, Kanagawa, JP;
Katsunori Kikuchihara, Kanagawa, JP;
Yoko Miyamoto, Kanagawa, JP;
Kiyotoshi Kaneyama, Kanagawa, JP;
Satoshi Matsuzaka, Kanagawa, JP;
Takashi Kawabata, Kanagawa, JP;
Masaaki Takahashi, Kanagawa, JP;
Keiji Yamamoto, Kanagawa, JP;
Satoru Torimaru, Kanagawa, JP;
Katsunori Kikuchihara, Kanagawa, JP;
Yoko Miyamoto, Kanagawa, JP;
Kiyotoshi Kaneyama, Kanagawa, JP;
Satoshi Matsuzaka, Kanagawa, JP;
Takashi Kawabata, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
The invention provides a double-faced image formation system that prevents transfer and adhesion of a lubricant to an image retaining conveyer and an intermediate transfer part. The system is provided with, on a return path for reversing and conveying a sheet having toner images fixed on one side thereof, a front face electrifying unit and a rear face electrifying unit. Oil adhered on the rear face of the sheet in a fixation unit by the rear face electrifying unit is electrified to a negative polarity, and the oil adhered on the rear face is made impossible to transfer to an intermediate transfer belt. The oil adhered on the front face of the sheet in the fixation unit by the front face electrifying unit is electrified to a positive polarity, and the oil adhered on the front face is made impossible to transfer to a secondary transfer conveyance belt.