Method of controlling toner concentration for electrophotographi

Details Method of controlling toner concentration for electrophotographi Method of controlling toner concentration for electrophotographi

1979-08-16

1982-08-31

Braun, Fred L.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

355 3DD, 355 14D, G03G 1308, G03G 1309

Patent

active

043472990

ABSTRACT:
A method of controlling toner concentration for an electrophotographic copying apparatus in which voltage to be impressed on a toner collecting or recovering roller disposed to contact a flow of a developing material after developing is arranged to vary so that a voltage lower than that for a reference density image is applied thereto for an image having a high density requiring a large toner consumption, while a voltage higher than that for the reference density image is applied thereto for an image having a low density requiring a small toner consumption.

REFERENCES:
patent: 3453045 (1969-07-01), Fantuzzo
patent: 3572922 (1971-03-01), Olden
patent: 3920329 (1975-11-01), Dennie et al.
patent: 3924462 (1975-12-01), Bock
patent: 3932034 (1976-01-01), Takahashi
patent: 4008686 (1977-02-01), Katakura et al.
patent: 4230070 (1980-10-01), Murasaki et al.

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