Magnet roller and developing device

Details Magnet roller and developing device Magnet roller and developing device

1995-07-07

1998-04-14

Royer, William J.

Electrophotography

Image formation

Development

C03G 1509

Patent

active

057405093

ABSTRACT:
A magnet roller including a columnar magnet with a through bore having a cross-section defining a thickness of the columnar magnet which is uneven along a circumference thereof, wherein a most thick portion of the columnar magnet has a strongest magnetic pole. The columnar magnet may be made from a resin material containing a magnetic powder. The bore cross-section may be non-circular, D-shaped, or rectangular. An insertion member may be inserted into the through bore to fixedly support the magnet roller.

REFERENCES:
patent: 4166263 (1979-08-01), Harada et al.
patent: 4557582 (1985-12-01), Kan et al.
patent: 4823689 (1989-04-01), Kishino et al.
patent: 4872418 (1989-10-01), Yoshikawa et al.
patent: 5384957 (1995-01-01), Mohri et al.
patent: 5469245 (1995-11-01), Aoshima et al.
patent: 5488341 (1996-01-01), Yamamoto et al.
relating to JP 60-59377, published Apr. 5, 1985. relating to JP 61-32079, published Feb. 14, 1986.
Patent Abstracts of Japan, vol. 10, No. 302 (E-445), Oct. 15, 1986, relating to JP 61-115303, published Jun. 2, 1986.
Patent Abstracts of Japan, vol. 15, No. 449 (P-1275), Nov. 14, 1991, relating to JP 3-189667, published Aug. 19, 1991.

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