Developer replenishment device with increased set up latitude

Details Developer replenishment device with increased set up latitude Developer replenishment device with increased set up latitude

1989-12-01

1991-08-20

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118657, 355251, G03G 1506

Patent

active

050418750

ABSTRACT:
An improved magnetic brush development apparatus for applying developer material to a latent electrostatic image wherein the set up latitude between the replenishment roller and replenishment skive wall is increased. The development apparatus includes a housing defining a sump portion adapted to contain a supply of developer material. 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, and a mechanism located in the sump portion agitates developer material and transports developer material to the feed mechanism. The development apparatus further includes a developer material replenishment device which has a reservoir for replenishment material adjacent to the sump portion, a flow communication path between the reservoir and the sump portion, and a selectively rotatable roller located relative to the path to control flow of replenishment material through the path. The entrance to the path is configured to engage the roller such that the set up latitude between the roller and path is increased.

REFERENCES:
patent: 3669072 (1972-06-01), Reynolds et al.
patent: 3830401 (1974-08-01), Benwood et al.
patent: 4324483 (1982-04-01), Tagawa et al.
patent: 4351604 (1982-09-01), Karasawa et al.
patent: 4699495 (1987-10-01), Hilbert
patent: 4867100 (1989-09-01), Yamazaki et al.

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