Image forming apparatus with a potential generating device

Details Image forming apparatus with a potential generating device Image forming apparatus with a potential generating device

1996-10-18

1998-04-28

Pendegrass, Joan H.

Electrophotography

Control of electrophotography process

Responsive to copy media characteristic

399 66, 399303, 399314, G03G 1516, G03G 1501

Patent

active

057458200

ABSTRACT:
A transfer drum has a dielectric layer and a conductive layer laminated in this order from a transfer material side. The transfer drum is provided with a power source section for applying a predetermined voltage to the conductive layer, and a grounded semiconductive roller, formed on the surface of the dielectric layer by using a semiconductor having elasticity. The semiconductive roller is brought into contact with the dielectric layer through the transfer material. For this reason, since a nip width, namely, a nip time can be easily adjusted, even if a type of the transfer material is changed, for example, the transfer material can electrostatically adhere to the transfer drum stably. As a result, unsatisfactory transfer of a toner image to the transfer material is eliminated, and thus the satisfactory image can be formed on the transfer material. Moreover, an image forming apparatus having a low-priced arrangement can be provided.

REFERENCES:
patent: 5187526 (1993-02-01), Zaretsky
patent: 5249023 (1993-09-01), Miyashiro et al.
patent: 5287163 (1994-02-01), Miyashiro et al.
patent: 5390012 (1995-02-01), Miyashiro et al.
patent: 5530532 (1996-06-01), Iino et al.
patent: 5565970 (1996-10-01), Suda
patent: 5623329 (1997-04-01), Yamauchi et al.

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