Developer depositing unit for an image forming apparatus

Details Developer depositing unit for an image forming apparatus Developer depositing unit for an image forming apparatus

1991-04-30

1992-01-21

Hix, L. T.

Photocopying

Projection printing and copying cameras

With developing

118651, G03B 2752

Patent

active

050831518

ABSTRACT:
In a developer depositing unit for an image forming apparatus, a developer is supplied to a developer carrying roller by a supply roller. The developer is charged by the frictional charge produced by contact between the supply roller and the developer carrying roller. The charged developer is displaced from the developer carrying roller to an ordinary sheet of paper, as the sheet of paper is passed around an electrode roller, to be thus electrostatically deposited on a sheet. A ground conductive brush is positioned to contact both the supply roller and the developer carrying roller to remove any excessive built-up charge on the supply roller and the developer carrying roller. The brush also prevents a build-up of developer on both rollers that could result in their becoming clogged.

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patent: 4836136 (1989-06-01), Natsuhara
patent: 4930430 (1990-06-01), Demizu et al.

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