Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,...
Patent
1987-02-19
1988-12-27
Braun, Fred L.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
355 3CH, 355 14CH, 430902, G03G 1302, G03G 2100
Patent
active
047940620
ABSTRACT:
A method for forming an outline of an image. In this method, at first, an electrostatic latent image bearing member is charged and then irradiated to a positive image to form an electrostatic latent image. Thereafter, the irradiated member is re-charged with a scorotron charger while applying a voltage to a grid, the voltage being lower than the surface potential of the image portion of the latent image, being slightly higher than the background potential of the latent image and being of the same polarity as that of the original charging. By this re-charging, the outline portion of the image is given higher potential than the other portion. Then, the outline portion of the image with higher potential is subjected to a normal development by using a toner charged to a polarity opposite to the polarity of the recharged portions.
REFERENCES:
patent: 3883349 (1975-05-01), Sato
patent: 3950680 (1976-04-01), Michaels et al.
patent: 3967891 (1976-07-01), Rippstein
patent: 4141648 (1979-02-01), Gaitten et al.
patent: 4634259 (1987-01-01), Oishi et al.
Oka Tateki
Toyoshi Naoki
Yokoyama Tomoaki
Braun Fred L.
Minolta Camera Kabushiki Kaisha
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