Image transferring device for an image forming apparatus and met

Details Image transferring device for an image forming apparatus and met Image transferring device for an image forming apparatus and met

Filed on

1995-11-29

Date issued

1997-08-05

Examiner

Pendegrass, Joan H.

Patent Class

Electrophotography

SubClass

Image formation

SubSubClass

Transfer

Other Related Categories

399312, G03G 1516

Type

Patent

Status

active

Patent number

056552009

Description

ABSTRACT:
An image transfer device and method for providing an image transfer device are provided in which a transfer belt is utilized for transferring an image from an image carrier to a transfer sheet, with a bias member supplying a bias voltage to the transfer belt. The bias member has a first layer and a second layer, with the first layer contacting an inner surface of the transfer belt, and with the second layer disposed below the first layer. The volume resistivity of the first layer is larger than that of the second layer. A relationship is also provided of an acceptable range of belt and roller resistivities, such that maintaining each of the belts and rollers (bias members) of a production lot within the range limits will ensure acceptable results despite variations of belt and roller resistivities within the production lot.

REFERENCES:
patent: 5172173 (1992-12-01), Goto et al.
patent: 5191378 (1993-03-01), Itaya et al.

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