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:
Feb. 03, 1987
Filed:
Dec. 19, 1984
Yutaka Deguchi, Himeji, JP;
Yasuyuki Tsuchida, Hyogo, JP;
Sanyo Electric Co., Ltd., , JP;
Abstract
An electrophotographic copying machine includes a photosensitive drum. A first electrostatic latent image according to an original copy image is formed in a state wherein a certain electric charge is accumulated and an original copy image formed by a first light source like a halogen lamp is focussed on this photosensitive drum. In order to form an additional information other than the original copy image, an LED array as a second light source is provided. By the second light source the additional information is formed on the photosensitive drum as the second electrostatic latent image. In case of recording the additional information, a shield member is utilized to prevent the electrostatic latent image by the original copy from being formed in the corresponding region of the photosensitive drum. The photosensitive drum comprises a material like amorphous silicon which is able to react to both first and second light sources.