Roller for electrophotographic development apparatus

Details Roller for electrophotographic development apparatus Roller for electrophotographic development apparatus

1995-09-11

1997-03-11

Moses, R. L.

Electrophotography

Image formation

Development

492 30, 492 56, 428 368, 399285, G03G 1508

Patent

active

056106955

ABSTRACT:
An electrophotographic development apparatus capable of maintaining the surface roughness of a developer roller thereof for a long term or even for the life span of the apparatus. The developer roller includes an elastic layer, formed on a core metal shaft, and made of a rubber elastic material with additional insulating micro-powder of 30 to 200 parts having a particle diameter in a range of 1 to 50 micrometers, where the amount of the rubber elastic material constitutes 100 parts. During a printing operation, the insulating micro-powder drops from the elastic layer as the rubber elastic material is worn, so that the developer roller can maintain its surface roughness in proportion to the particle diameter of the dropped powder.

REFERENCES:
patent: 4760422 (1988-07-01), Seimiya et al.
patent: 5062385 (1991-11-01), Nishio et al.
patent: 5164773 (1992-11-01), Nishio et al.
patent: 5434653 (1995-07-01), Takizawa et al.
patent: 5443873 (1995-08-01), Itani et al.
patent: 5458937 (1995-10-01), Nakamura et al.

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