Method and apparatus utilizing corona erase for improving a mult

Details Method and apparatus utilizing corona erase for improving a mult Method and apparatus utilizing corona erase for improving a mult

1987-04-08

1989-02-14

Martin, Roland E.

Radiation imagery chemistry: process, composition, or product th

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

To produce color reproduction

430 97, 430902, 355 3CH, 355 4, G03G 1301, G03G 1322, G03G 1501, G03G 1522

Patent

active

048046027

ABSTRACT:
An improvement in the method and apparatus for producing a multi-color electrophotographic image wherein an electrophotographic medium can be used for multiple charge-expose cycles without the accumulation of trapped charges which can result in an increase in toe voltage. The invention provides for the charging, exposing and toning of the medium to produce a first color visible image. The carrier is then returned to the first position to repeat the foregoing steps to charge, expose and tone to produce a second color visible image. Prior to the second charging step the medium is reverse charged and trapped charges are neutralized to substantially revitalize the medium to a condition closely resemblng its unused condition to substantially eliminate the rise in toe voltage.

REFERENCES:
patent: 3687661 (1972-08-01), Sato et al.
patent: 4634259 (1987-01-01), Oishi et al.

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