Developing device

Details Developing device Developing device

1991-10-16

1993-01-05

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355246, G03G 1506

Patent

active

051775395

ABSTRACT:
In a developing device for use in a picture forming apparatus such as a laser printer and the like and having a developing tank and a supply tank, a sealing member for closing a path in communication with the supply tank and a toner supply outlet is provided. The sealing member is automatically switched from closed state to opened state by frictional force of a supply roller when the supply roller is rotated.

REFERENCES:
patent: 4998140 (1991-03-01), Satou et al.
patent: 5012285 (1991-04-01), Oka et al.
patent: 5012289 (1991-04-01), Aldrich et al.

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