Dry-type developing device for electrophotography

Details Dry-type developing device for electrophotography Dry-type developing device for electrophotography

1985-02-25

1986-05-06

Pianalto, Bernard D.

Coating apparatus

Control means responsive to a randomly occurring sensed...

118657, 118712, B05C 1100

Patent

active

045864616

ABSTRACT:
A developing roll is composed of a hollow nonmagnetic sleeve and a permanent magnet disposed therein and having a plurality of poles, the sleeve and the permanent magnet being independently rotatable in the same direction. The hollow nonmagnetic sleeve is rotatable at a constant speed. The permanent magnet is rotatable at varying speeds dependent on a signal indicative of a count value from a printing density counter means for supplying a developer from a developer tank. The printing density counter means successively counts print data to be developed.

REFERENCES:
patent: 4082445 (1978-04-01), Steiner
patent: 4267248 (1981-05-01), Yamashita

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