Internal electrical contact for magnetic development rolls

Details Internal electrical contact for magnetic development rolls Internal electrical contact for magnetic development rolls

1995-09-25

1997-02-25

Brase, Sandra L.

Electrophotography

Image formation

Development

G03G 1509

Patent

active

056067224

ABSTRACT:
A magnetic brush developer roll structure comprising a stationary magnet assembly including a magnet assembly shaft supporting magnet material. Bearings carried by the shaft, in turn, support a rotatable shell or tube forming the outer member of the roll structure. The bearings together with the shell or tube delineate an essentially sealed cavity in which one or more electrical contact brushes are disposed. The brush rubs against an inner wall of the shell or tube and provides an electrical path thereto. Using a plurality of brushes results in improved reliability.

REFERENCES:
patent: 4656964 (1987-04-01), Kano et al.
patent: 5283619 (1994-02-01), Nomura et al.
patent: 5360940 (1994-11-01), Hays
patent: 5394225 (1995-02-01), Prker
patent: 5410390 (1995-04-01), Miura et al.
patent: 5428429 (1995-06-01), Fletcher
patent: 5502549 (1996-03-01), Hart et al.

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