Electrophotographic process and photosensitive screen for use in

Details Electrophotographic process and photosensitive screen for use in Electrophotographic process and photosensitive screen for use in

1981-06-19

1984-03-20

Kittle, John E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Using ion or particle flow modulation

430 55, 430 68, G03G 1500

Patent

active

044381867

ABSTRACT:
In a process for forming electrophotographically a duplicated copy of a document by modulating a corona ion stream passing through fine apertures of a photosensitive screen in accordance with a primary electrostatic charge latent image formed on the photosensitive screen use is made of the photosensitive screen comprising an electrically conductive sheet-like member having a great number of fine apertures, a photoconductive member applied on at least one side of the conductive member and an electrically insulating member applied on the other side of the conductive member, the conductive member being completely surrounded by the photoconductive and insulating members. An improved process for forming the primary charge latent image on said screen includes a step for subjecting the photosensitive screen to an imagewise exposure corresponding to an image of the document simultaneously with electrostatically charging the screen; and a step for subjecting the photosensitive screen to a uniform exposure to form on the insulating layer of the screen the primary electrostatic charge latent image corresponding to an image of the document to be duplicated and having extremely high electrostatic contrast.

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patent: 4092160 (1978-05-01), Jackson et al.

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