Electrophotography – Internal machine environment – Particle or contaminant control
Patent
1997-07-30
1998-09-22
Grimley, Arthur T.
Electrophotography
Internal machine environment
Particle or contaminant control
399104, G03G 1508
Patent
active
058129090
ABSTRACT:
A developing device includes a container for containing a magnetic developer therein, a developer carrier for carrying and conveying the magnetic developer in the container, a magnetic member for forming a magnetic seal area of a predetermined gap with respect to the surface of the developer carrier in the end portions of the developer carrier along the circumferential direction of the developer carrier. The magnetic member has a plurality of magnetic poles along the circumferential direction of the developer carrier in the magnetic seal area, and an external magnetic pole provided outside the endmost magnetic pole forming the magnetic seal for conveying a magnetic flux travelling from the endmost magnetic pole toward the outside of the magnetic seal area.
REFERENCES:
patent: 5187326 (1993-02-01), Shirai
patent: 5267007 (1993-11-01), Watanabe et al.
patent: 5450169 (1995-09-01), Hart et al.
Karakama Toshiyuki
Oguma Toru
Sasaki Shin-ichi
Tsuda Tadayuki
Canon Kabushiki Kaisha
Grimley Arthur T.
Tran Hoan
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