The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 1989
Filed:
Sep. 24, 1987
Kenichi Tsuneeda, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
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.