Developing device with shutter

Details Developing device with shutter Developing device with shutter

1988-08-04

1991-04-23

Grimley, A. T.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355251, 355253, G03G 1509

Patent

active

050091875

ABSTRACT:
A developing device for an electrophotographic copier includes a shutter along its toner supply route and a toner concentration detector sensor connected to a timing circuit. If the toner concentration is detected low, the timing circuit causes the toner supply to continue even after development is completed and the shutter is closed. An auxiliary stirrer is provided to keep stirring freshly supplied toner even after development is completed and the shutter is closed.

REFERENCES:
patent: 4607933 (1986-08-01), Haneda et al.
patent: 4699079 (1987-10-01), Palm et al.
patent: 4716437 (1987-12-01), MacLellan
patent: 4739365 (1988-04-01), Hino
patent: 4748471 (1988-05-01), Adkins
patent: 4758861 (1988-07-01), Nakamaru et al.

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