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:
Apr. 28, 1981
Filed:
Oct. 25, 1978
Takao Fujiwara, Toyokawa, JP;
Kidetoshi Kawabata, Tondabayashi, JP;
Masaya Ogawa, Osaka, JP;
Tatsuya Okada, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
An electrophotographic copying apparatus has a drum with an endless photoconductive material on its periphery and has arranged around the periphery of the photoconductive drum an eraser unit, a charging unit, a slit exposure unit, a developing unit, a transfer unit and a cleaning unit disposed within or close to the developing unit. The charging, exposure and developing units are operable during the first revolution of the photoconductive drum to form an image thereon, the cleaning unit being operable to clean the surface of the photoconductive drum during the second revolution thereof. The photoconductive drum in the course of the second revolution is adapted to rotate until the rear end of the image formed on the photoconductive drum has passed the charging unit, whereupon one copying cycle is completed. The front end of the image to be subsequently formed can be positioned on a portion of the photoconductive drum other than where the front end of the image formed during the abovementioned cycle is positioned.