Coating apparatus – With vacuum or fluid pressure chamber
Patent
1977-05-12
1978-09-05
Stein, Mervin
Coating apparatus
With vacuum or fluid pressure chamber
118647, 118658, G03G 15044, G03G 1514, B05C 1100
Patent
active
041111524
ABSTRACT:
A magnetic brush applies a toner substance to a photoconductive drum for development. A bias voltage source applies a bias voltage across the series arrangement of a variable resistance means, the magnetic brush, the toner substance between the magnetic brush and the drum and a non-image portion of the drum. The variable resistance means is adjusted until the current therethrough is a predetermined optimum value, and thereafter maintained constant for development, thereby compensating the bias voltage for fatigue of the toner substance.
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Falik Andrew M.
Jordan Frank J.
Ricoh Co. Ltd.
Stein Mervin
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