Electrophotographic liquid developing system

Details Electrophotographic liquid developing system Electrophotographic liquid developing system

1979-05-10

1981-01-13

Kendall, Ralph S.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to condition of coating material

118647, 355 10, G03G 1510

Patent

active

RE0304778

ABSTRACT:
An electrophotographic liquid developing system for overcoming the effect of photoconductor background potential in which during the passage of the image area through the developer unit a constant current source supplies a small current to the development electrode to raise the electrode to a potential of the same polarity as and of a magnitude greater by predetermined amount than that of the average background potential of the image area in a preferred embodiment the constant current source is provided by a small plate mounted in and insulated from the transfer corona housing and having such dimensions as to provide the required current. Preferably, the output of the constant current source is controlled in response to a measurement of the conductivity of the developer.

REFERENCES:
patent: 2956487 (1960-10-01), Giaimo, Jr.
patent: 3411482 (1968-11-01), Brodie
patent: 3611982 (1971-10-01), Coriale et al.
patent: 3674532 (1972-07-01), Morse
patent: 3782818 (1974-01-01), Smith
patent: 3815989 (1974-06-01), Davis et al.
patent: 3860436 (1975-01-01), Meagher
patent: 3892481 (1975-07-01), Schaefer et al.
patent: 4052127 (1977-10-01), Kuroishi et al.

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