Coating processes – Roller applicator utilized
Patent
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.
Endoh Shuichi
Hosokawa Hiroshi
Komatsubara Satoru
Matsumae Iwao
Murakami Eisaku
Pianalto Bernard
Ricoh & Company, Ltd.
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