Device for improving mixing in a magnetic brush development appa

Details Device for improving mixing in a magnetic brush development appa Device for improving mixing in a magnetic brush development appa

1989-12-01

1991-09-03

Braun, Fred L.

Photocopying

Contact printing

Light boxes

118657, 355245, G03G 1509

Patent

active

050458868

ABSTRACT:
A magnetic brush development apparatus for applying developer material to a latent electrostatic image wherein the mixing of pigmented marking particles in the developer material is enhanced. The development apparatus includes a housing having a portion defining a sump adapted to contain a supply of developer material to which marking particles may be selectively added. A magnetic brush is located substantially within the housing in spaced relation to the sump portion for applying developer material to the latent image. A feed mechanism, located within the housing between the sump portion and the magnetic brush transports developer material from the sump to the magnetic brush. An agitating and transporting mechanism, located in said sump portion, agitates developer material and transports developer material to the feed mechanism. In order to enhance the mixing of developer material, flow of developer material is directed from the wall of the housing adjacent to the sump portion back into the agitating and transport mechanism.

REFERENCES:
patent: 4261290 (1981-04-01), Yamashita et al.
patent: 4481903 (1984-11-01), Haberhauer et al.
patent: 4634286 (1987-01-01), Pike
patent: 4671207 (1987-06-01), Hilbert
patent: 4707107 (1987-11-01), Joseph
patent: 4878089 (1989-10-01), Guslits et al.

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