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:
Mar. 27, 2001
Filed:
Dec. 14, 1999
Yasuo Nami, Toride, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to an electrophotographic apparatus in which the apparatus is provided with a sequence in which a dark portion and a light portion are formed on a first portion and a second portion, respectively, on a photosensitive member by an electrostatic image forming device, whereafter the first portion and the second portion are exposed by a pre-exposure device, and then the first portion and the second portion are charged by a charger, and then a surface potential of the first portion and the second portion are detected by a detector, and an exposure amount at which the photosensitive member is exposed by the pre-exposure device is controlled in conformity with the potential of the first portion and the potential of the second portion detected by the detector in the sequence.