Photocopying – Contact printing – Light boxes
Patent
1993-04-08
1995-10-24
Beatty, Robert
Photocopying
Contact printing
Light boxes
355274, G03G 2100
Patent
active
054614619
ABSTRACT:
An image forming apparatus includes a photoconductive element and a transfer belt, with an electrode or bias applicator located downstream from a nip formed between the photoconductive element and the transfer belt. Upstream from the nip, a roller is provided which can also act as an electrode, or which can be held in an electrically floating state. A bias voltage can also be provided to the roller upstream from the nip, with the voltage equal to or less than the voltage applied to the downstream electrode. In addition, the applied voltages can be varied based upon the position of a sheet of paper, or in response to changes in humidity.
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Bisaiji Takashi
Harasawa Yuko
Kamiyama Hideki
Kawaishi Yasunori
Matsuda Itaru
Beatty Robert
Ricoh & Company, Ltd.
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