Electrophotography – Document handling – Copy
Reexamination Certificate
2005-06-07
2005-06-07
Hirshfeld, Andrew H. (Department: 2854)
Electrophotography
Document handling
Copy
C399S324000, C399S341000, C399S393000, C399S409000, C399S127000, C399S128000, C399S296000, C118S060000, C219S216000
Reexamination Certificate
active
06904262
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.
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Kaneyama Kiyotoshi
Kawabata Takashi
Kikuchihara Katsunori
Matsuzaka Satoshi
Miyamoto Yoko
Crenshaw Marvin P.
Fuji 'Xerox Co., Ltd.
Hirshfeld Andrew H.
Morgan & Lewis & Bockius, LLP
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