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:
Nov. 09, 1976
Filed:
Feb. 13, 1975
Syusei Tsukada, Tokyo, JA;
Canon Kabushiki Kaisha, Tokyo, JA;
Abstract
In an image forming apparatus for selectively reproducing positive and negative electrostatic latent images corresponding to an original image, there is provided a photosensitive medium having an insulating layer on its surface, a first charger capable of uniformly imparting charges to the surface of the photosensitive medium, a second charger capable of acting on the photosensitive medium after the action of the first charger, projection apparatus for projecting the original image to expose the photosensitive medium to the image, a third charger open with respect to the projection-exposure of the original image by the projection apparatus and capable of acting on the photosensitive medium simultaneously therewith, a uniform exposure lamp for imparting uniform exposure to the photosensitive medium, and control circuitry for controlling the operations of the second and third chargers and the uniform exposure lamp.