Image forming apparatus

Details Image forming apparatus Image forming apparatus

1998-06-02

1999-06-01

Moses, Richard

Electrophotography

Image formation

Transfer

399297, 399303, 399308, G03G 1501, G03G 1516

Patent

active

059096110

ABSTRACT:
Stable attraction of the transfer paper and stable toner transfer are ensured by preventing an electrostatic attracting force of transfer paper from lowering as charge accumulated on the transfer paper moves through ends of a transfer drum thereby declining. The transfer drum provided in a transfer section is composed of a dielectric layer, a semi-conductive layer, and a conductive layer laminated in this order from a transfer paper side, and there are further provided a power source section for applying a predetermined voltage to the conductive layer, and a grounded conductive roller which comes into contact with a surface portion, on an upstream side to a transfer point, of the dielectric layer with the transfer paper therebetween. Further, an insulating material is applied to ends of at least one of the dielectric layer, the semi-conductive layer, and the conductive layer.

REFERENCES:
patent: 5390012 (1995-02-01), Miyashiro et al.
patent: 5623329 (1997-04-01), Yamauchi et al.
patent: 5669052 (1997-09-01), Kusaba et al.
patent: 5745831 (1998-04-01), Nakazawa et al.
patent: 5752130 (1998-05-01), Tanaka et al.
patent: 5761571 (1998-06-01), Suzuki et al.
patent: 5765084 (1998-06-01), Asada et al.
patent: 5771430 (1998-06-01), Iwakura

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