Electrophotographic development apparatus

Coating apparatus – With means to apply electrical and/or radiant energy to work... – With electromagnetic and/or electrostatic removal of...

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427 15, 118DIG23, G03G 1510

Patent

active

039644367

ABSTRACT:
Disclosed is an apparatus for developing an electrostatic latent image on a frame of a multi-frame electrophotograhic film by placement of the film parallel to a closely spaced electrically floating development electrode which has a special size relationship to the charged frame area and by application of electrostatically charged toner particles between the electrode and the film. The development electrode is limited in size to have a potential induced upon it by the charge film which is between the highest and lowest potential charge on the imaged frame. In its peferred use, the development electrode is no greater in size than 10 percent larger than the charged frame area being developed, and preferably does not extend laterally beyond the frame.

REFERENCES:
patent: 3411482 (1968-11-01), Brodie
patent: 3655419 (1972-04-01), Tamai et al.
patent: 3683852 (1972-08-01), Yamaguchi
patent: 3716295 (1973-02-01), Nakajima et al.
patent: 3789753 (1974-02-01), Rutherford
patent: 3898957 (1975-08-01), Masumura

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