Image forming apparatus capable of obtaining stable transfer usi

Details Image forming apparatus capable of obtaining stable transfer usi Image forming apparatus capable of obtaining stable transfer usi

1997-10-23

1999-11-02

Beatty, Robert

Electrophotography

Image formation

Transfer

399313, G03G 1501

Patent

active

059786370

ABSTRACT:
An image forming apparatus includes an image holding member for forming a toner image, and a transfer roller for transferring the toner image formed on the image holding member onto a recording paper sheet. The absolute value of (.DELTA. log R)/.DELTA.V[(log .OMEGA.)/kV] representing the voltage dependence of resistance R of the transfer roller is set not more than 0.5. The contacting portion of the transfer roller and an intermediate belt can be uniformly discharged, and therefore intermediate belt can be prevented from being changed in its property. As a result, an image forming apparatus having a stable transfer characteristic can be provided.

REFERENCES:
patent: 3781105 (1973-12-01), Meagher
patent: 4379630 (1983-04-01), Suzuki
patent: 5132738 (1992-07-01), Nakamura et al.
patent: 5571457 (1996-11-01), Vreeland et al.
patent: 5701569 (1997-12-01), Kanazawa et al.

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