Developing apparatus with auxiliary seal disposed outside of end

Details Developing apparatus with auxiliary seal disposed outside of end Developing apparatus with auxiliary seal disposed outside of end

1998-11-23

2000-05-30

Grimley, Arthur T.

Electrophotography

Internal machine environment

Particle or contaminant control

399105, 399106, G03G 1508

Patent

active

060700270

ABSTRACT:
A developing apparatus including a developing frame, a developing roller disposed at an opening portion of the developing frame and adapted for bearing a developing agent, a first seal member for closing a gap between the developing frame and the developing roller along an entire length of the gap in a circumferential direction of the developing roller to prevent leakage of developing agent, and a second seal member contacted with outer end face of the first seal member, wherein the second seal member is only provided downstream of a developing zone at which electrostatic latent images are developed, with respect to a rotational direction of said developing roller.

REFERENCES:
patent: 5321473 (1994-06-01), Azami
patent: 5758230 (1998-05-01), Nakaue et al.

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