Electrophotographic printing process using photochromic compound

Details Electrophotographic printing process using photochromic compound Electrophotographic printing process using photochromic compound

1988-07-15

1989-11-28

Welsh, J. David

Radiation imagery chemistry: process, composition, or product th

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

To produce multiple image on medium or plural radiant energy...

430 58, 430 59, 430 75, 430 19, 430902, 430952, G03G 1322

Patent

active

048837334

ABSTRACT:
An electrophotographic printing process is disclosed that comprises the steps of: imagewise exposing a photosensitive means with light of a wavelength at which photochromism occurs, to thereby record the image therein, wherein said photosensitive means has a photosensitive layer formed on a conductive support, said photosensitive layer containing a photochromically sensitive compound that shows photoconductivity when irradiated with light of different wavelengths before and after said photochromism occurs; charging the entire surface of said photosensitive layer; and uniformly exposing said photosensitive means with light of a wavelength at which photochromism does not occur, but at which said photochromically sensitive compound or photoisomeric compound therewith shows photoconductivity, to thereby form the image of a charge pattern on the surface of said photosensitive layer.

REFERENCES:
patent: 3837853 (1974-09-01), Masaki

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