Electrophotographic apparatus having developing device with seal

Details Electrophotographic apparatus having developing device with seal Electrophotographic apparatus having developing device with seal

1994-06-10

1996-01-30

Royer, William J.

Photocopying

Contact printing

Light boxes

355245, G03G 2100

Patent

active

054884624

ABSTRACT:
A developing device used in an electrophotographic apparatus has seal members fixedly disposed between both end portions of a developing roller and those portions of inner walls of a device casing which correspond to both end portions of the developing roller. The seal members are made of a material which can be charged by friction with the developing roller to have the same polarity as charged toner. The toner is blocked by the seal members and prevented from entering end portions of the developing roller.

REFERENCES:
patent: 5057868 (1991-10-01), Sekino et al.
patent: 5073797 (1991-12-01), Ono et al.
patent: 5134960 (1992-08-01), Shirai
patent: 5212521 (1993-05-01), Ogawa et al.
patent: 5274425 (1993-12-01), Fukumoto et al.
patent: 5321473 (1994-06-01), Azami

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