Even bias applying transfer roller

Details Even bias applying transfer roller Even bias applying transfer roller

1999-01-26

2000-06-06

Pendegrass, Joan

Electrophotography

Image formation

Transfer

399314, G03G 1516

Patent

active

060729775

ABSTRACT:
An image forming apparatus includes a photo-conductive member that carries a toner image on its surface and a transfer roller that pressure contacts the surface to transfer the toner image to a sheet. The transfer roller includes a bias-applying axis and an elastic layer engaged with a surface of the bias-applying axis. The image forming apparatus further includes a bias-applying device that applies a bias voltage to the bias applying axis. The elastic layer or the bias-applying axis has end portions and a middle portion between the end portions. The end portions have diameters greater than the middle portion.

REFERENCES:
patent: 3942888 (1976-03-01), Maksymiak et al.
patent: 3984183 (1976-10-01), Maksymiak
patent: 5168313 (1992-12-01), Hosaka et al.
patent: 5768665 (1998-06-01), Yamanaka et al.

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