Method of and apparatus for developing electrophotographic film

Details Method of and apparatus for developing electrophotographic film Method of and apparatus for developing electrophotographic film

1988-07-05

1989-10-17

Grimley, Arthur T.

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355256, 118647, 118659, 430103, 430117, G03G 1510

Patent

active

048750808

ABSTRACT:
A developing apparatus wherein a developer is supplied to an exposed electrophotographic film to develop an image formed on the film has a developing section provided with an electrode which is disposed in opposing relation to the film. A bias voltage of the same polarity as that of the film which is electrically charged is applied to the electrode to prevent fogging of the image. The bias voltage is lowered or made opposite in polarity for a relatively short period of time, thereby momentarily improving the adhesion of the developer to the film, and thus allowing the developer to reliably adhere even to a relatively low density portion of the image.

REFERENCES:
patent: 4319544 (1982-03-01), Weber
patent: 4563080 (1986-01-01), Ottley
patent: 4624554 (1986-11-01), Ohtsuka et al.

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