Toner conveyor roller and image forming apparatus having the sam

Details Toner conveyor roller and image forming apparatus having the sam Toner conveyor roller and image forming apparatus having the sam

Filed on

1995-12-04

Date issued

1997-04-01

Examiner

Grimley, Arthur T.

Patent Class

Electrophotography

SubClass

Image formation

SubSubClass

Development

Other Related Categories

492 18, 492 53, 399159, G03G 1508, G03G 1509

Type

Patent

Status

active

Patent number

056171919

Description

ABSTRACT:
In an electrophotographic image forming apparatus of the type using single-ingredient type high resistance toner, a developing roller or similar toner conveyor roller is covered with a dielectric layer which is comparatively thick at opposite end portions than at an intermediate portion. A conductive or semiconductive elastic layer underlies the dielectric layer. With the above configuration, the dielectric layer is prevented from coming off the roller. This, coupled with the tact that the elastic layer does not contact a photoconductive element, eliminates current leaks and thereby extends the life of the roller and photoconductive element.

REFERENCES:
patent: 4227797 (1980-10-01), Tsunoi
patent: 4425382 (1984-01-01), Tajima
patent: 5126800 (1992-06-01), Shishido et al.
patent: 5168312 (1992-12-01), Aoto et al.
patent: 5214239 (1993-05-01), Koga et al.
patent: 5489747 (1996-02-01), Takenaka et al.

Affiliated with

Also associated with

Rating

Toner conveyor roller and image forming apparatus having the sam does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Toner conveyor roller and image forming apparatus having the sam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Toner conveyor roller and image forming apparatus having the sam will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-543543