Linearly movable developer unit magnet

Details Linearly movable developer unit magnet Linearly movable developer unit magnet

1989-05-01

1990-11-20

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

118658, G03G 1509

Patent

active

049722310

ABSTRACT:
An apparatus which develops a latent image recorded on a photoconductive member with developer material. The developer material is transported by a tubular member into a development zone. Developer material is attracted to the surface of the tubular member by a stationary magnet. A movable magnet translates from an operative position, wherein the magnet generates a weak magnetic field in the development zone, and a non-operative position, wherein the magnet generates a strong magnetic field in the development zone. In the operative position, the weak magnetic field releases the developer material from the surface of the tubular member so that the latent image attracts the developer material thereto. In the non-operative position, the strong magnetic field attracts the developer material to the surface of the tubular member preventing development of the latent image.

REFERENCES:
patent: 4752802 (1988-06-01), Ito et al.
patent: 4771311 (1988-09-01), Bray
patent: 4801966 (1989-01-01), Ikeda

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