Toner density detection method for electrophotographic apparatus

Details Toner density detection method for electrophotographic apparatus Toner density detection method for electrophotographic apparatus

1993-05-19

1994-10-25

Braun, Fred L.

Photocopying

Contact printing

Light boxes

G03G 2100, G03G 1506

Patent

active

053593960

ABSTRACT:
A toner density detection method for an electrophotographic apparatus in which driving of a rotary roll provided at an outlet of a special vessel is continued for a predetermined period of time (e.g., several seconds) after the operation of the electrophotographic apparatus is stopped. All or substantially all of the developing agent is thus exhausted or removed from the special vessel after the electrophotographic apparatus is stopped, so that the true permeability of the developing agent can be detected by a permeability sensor when the operation of the electrophotographic apparatus is restarted. As a result, the toner density of the developing agent can be controlled and kept normal, so that the printing quality can be stabilized.

REFERENCES:
patent: 4786942 (1988-11-01), Kusumoto et al.
patent: 4974025 (1990-11-01), Kikuchi
patent: 5006893 (1991-04-01), Yokoyama
patent: 5036363 (1991-07-01), Iida et al.
patent: 5047804 (1991-09-01), Komura
patent: 5091749 (1992-02-01), Iida et al.

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