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:
Jun. 15, 1976
Filed:
Mar. 31, 1975
Seiji Matsumoto, Asaka, JA;
Isoji Takahashi, Asaka, JA;
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Abstract
An electrophotographic process comprising (1) arranging (a) a main photoconductive layer disposed on a conductive base, on the surface of which a charge is uniformly provided, and (b) an auxiliary photoconductive layer, disposed on a light transmissive conductive layer on the surface of which is provided charge opposite to that on the main photoconductive layer, to face each other across a small distance, (2) simultaneously forming, by image exposure to the same original from the back of the auxiliary photoconductive layer, electrostatic latent images on both the layers where the product of relative sensitivity ratio and relative exposure ratio of the main photoconductive layer is 2 to 1000 times greater or less than the product of relative sensitivity ratio and relative exposure ratio of the auxiliary photoconductive layer, and (3) thereafter supplying a developer between the layers while still facing each other for developing the latent image on the main photoconductive layer, the developed image reproducing gradations in tone of the original due to the latent image on the auxiliary photoconductive layer.