Magnetic developer conveying device

Details Magnetic developer conveying device Magnetic developer conveying device

1987-08-31

1988-05-10

Prescott, A. C.

Photocopying

Including fiber optics

355 14D, 118657, 118658, G03G 1509

Patent

active

047439424

ABSTRACT:
A device for conveying a magnetic developer, includes a non-magnetic sleeve for carrying the magnetic developer, a resin magnet stationarily disposed in the sleeve, the magnet being of a mixture of a resin material and a magnetic material, and extending in a direction of a length of the sleeve, the magnet having first and second magnetic field generating portions, first and second magnetic members disposed outside the sleeve extending in the direction of the length of the sleeve, wherein the first and second magnetic members are spaced apart from each other and are so disposed that a magnetic force applied to the magnet by a magnetic force between the first magnetic field generating portion and the first magnetic member reduces a resultant force to the magnetic by gravity and by a magnetic force between the second magnetic field generating portion and the second magnetic member.

REFERENCES:
patent: 4244322 (1981-01-01), Nomura et al.
patent: 4509031 (1985-04-01), Sakata et al.
patent: 4557582 (1985-12-01), Kan et al.
patent: 4558294 (1985-12-01), Yamashita
patent: 4563978 (1986-01-01), Nakamura et al.
patent: 4610531 (1986-09-01), Hayashi et al.
patent: 4637706 (1987-01-01), Hosoi et al.
patent: 4638760 (1987-01-01), Nakamura et al.
patent: 4640808 (1987-02-01), Okumura et al.
Patent Abstracts of Japan, vol. 9, No. 120 (P-358)[1843], May 24, 1985.

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