Intense pre-illumination electrophotographic process
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United States of America Patent
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Jul 30, 1985
Grant Date -
N/A
app pub date -
May 17, 1983
filing date -
May 18, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of forming an image on an electrophotographic film material is described. This involves a contact printing technique and comprises the following steps: (a) placing an image-bearing master in contact with the film; (b) exposing the film to light through the image-bearing master, the exposure being substantially greater than the minimum necessary to render conductive the photo-conductive layer of the electrophotographic film; (c) applying a substantially uniform charge to the surface of the film in the dark immediately after exposure; (d) leaving the film in the dark for a short time so as to allow the charge to migrate selectively; and (e) then developing the image.
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