Method of coating a toner conveyor roller

Details Method of coating a toner conveyor roller Method of coating a toner conveyor roller

1996-09-19

1999-03-09

Pianalto, Bernard

Coating processes

Roller applicator utilized

427466, B05D 128

Patent

active

058797521

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 fact 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: 4533563 (1985-08-01), Dahlgren et al.
patent: 5133998 (1992-07-01), Okazaki et al.

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