Electrophotography – Control of electrophotography process – Control of transfer
Reexamination Certificate
2006-02-13
2008-03-18
Gray, David M. (Department: 2852)
Electrophotography
Control of electrophotography process
Control of transfer
Reexamination Certificate
active
07346287
ABSTRACT:
A transfer device transfers a visual image from an image carrier to a recording medium. The transfer device includes a first transfer element that moves and receives the visual image from the image carrier on a first surface of the first transfer element, a second transfer element provided opposite to the first surface of the first transfer element to pinch and convey the recording medium through a secondary transfer nip part, a facing roller provided on a second surface of the first transfer element opposite to the first surface thereof, and a constant-current power supply that applies an electric current voltage to a core metal of the facing roller to transfer the visual image from the first transfer element to the recording medium. The electric current voltage applied to the core metal has a polarity equal to a polarity of the visual image and is subjected to a constant-current control.
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Katoh Kohki
Kawagoe Katsuya
Ogiyama Hiromi
Sawai Yuuji
Sugino Akihiro
Gleitz Ryan
Gray David M.
Ricoh & Company, Ltd.
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