Transfer device for image forming machine

Details Transfer device for image forming machine Transfer device for image forming machine

Filed on

1995-10-13

Date issued

1996-11-12

Examiner

Beatty, Robert

Patent Class

Electrophotography

SubClass

Image formation

SubSubClass

Transfer

Other Related Categories

G03G 1514

Type

Patent

Status

active

Patent number

055745504

Description

ABSTRACT:
A transfer device for an image forming machine has a driving roller, a driven roller disposed at a distance from the driving roller, a transfer belt extending between the driving roller and the driven roller, a transfer roller disposed opposite an image bearing member, with the transfer belt interposed therebetween and pressing the transfer belt against the image bearing member, and a voltage source for applying a predetermined voltage onto the transfer roller. The transfer roller consists of a rotating shaft and a roller portion mounted on the rotating shaft, and the hardness of the roller portion is set to result in a compression of 0.45 to 2.00 mm at a linear pressure of 3 g/cm. The volume resistivity of the roller portion of the transfer roller is set at 10.sup.2 to 10.sup.9 ohm-centimeters.

REFERENCES:
patent: 4407580 (1983-10-01), Hashimoto et al.
patent: 5172173 (1992-12-01), Goto et al.
patent: 5287152 (1994-02-01), Oka et al.
patent: 5469248 (1995-11-01), Fujiwara et al.

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