Developing device and image forming apparatus

Details Developing device and image forming apparatus Developing device and image forming apparatus

2006-05-16

2008-09-02

Gleitz, Ryan (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

Reexamination Certificate

active

07421227

ABSTRACT:
A developing device includes a developing sleeve for supplying toner particles to a latent image area on a peripheral surface of a photoconductive drum while rotating about an axis. The developing sleeve has a permanent magnet therein. Two magnetic members are provided in the developing device and face opposite ends of a peripheral surface of the developing sleeve at a predetermined distance from the developing sleeve. The magnetic members have arc-shaped inner surfaces. A blade is spaced a predetermined distance from a central portion of the peripheral surface of the developing sleeve. The blade adjusts the amount of toner particles supplied to the photoconductive drum. The gap between the arc-shaped inner surface of the magnetic member and the peripheral surface of the developing sleeve gradually increases from upstream to downstream in a rotational direction of the developing sleeve.

REFERENCES:
patent: 6101354 (2000-08-01), Nakagawa et al.
patent: 6160976 (2000-12-01), Karakama et al.
patent: 2-262171 (1990-10-01), None

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