Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1987-09-24
1989-12-05
Goodrow, John L.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
355268, G03G 1501
Patent
active
048852210
ABSTRACT:
An electrophotography apparatus of the present invention includes a movable photoconductive drum capable of carrying an electrostatic latent image on its surface, and a plurality of electrophotographic process means located along a moving direction of the photoconductive drum. A first or second static latent image is formed on the photoconductive drum charged by a main charger, at a first or second exposure radiating portion. In this case, the first and second exposure radiating portions are selectively operated in accordance with whether an original image is a positive or negative film, the first static latent image, formed at the first exposure radiating portion, is reversely developed by a first developing unit, and the second static latent image, formed at the second exposure radiating portion, is normally developed by a second developing unit. An image developed by the first or second developing unit, in accordance with the original image, is transferred onto a recording medium such as paper, by a transfer charger. Any residual transfer developing agent not transferred onto the paper by the transfer charger, but instead remaining on the photoconductive drum, is collected by the first developing unit.
REFERENCES:
patent: 3376133 (1968-04-01), Roteman
patent: 4350749 (1982-09-01), Ohnuma et al.
patent: 4731313 (1988-03-01), Haneda
Goodrow John L.
Kabushiki Kaisha Toshiba
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