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. 23, 2002
Filed:
Jun. 08, 2000
Fujitsu Limited, Kawasaki, JP;
Abstract
Image forming unit has a photosensitive drum unit and a developing unit. The photosensitive drum unit has drum shafts extending outward from opposite sides thereof. The developing unit has a through-hole and a drum shaft mounting groove for receiving the drum shafts, and developing unit rotary shafts extending outward from opposite sides thereof. An engagement lever and a toner returning cylinder are provided in the photosensitive drum unit, and a shutter is provided in the developing unit. The toner returning cylinder and the shutter are disposed between the waste toner tank of the photosensitive drum unit and the toner returning pipe of the developing unit so that they are detachable and separable from each other. Further, a mechanism is provided for pressing the developing roller onto the photosensitive drum when the photosensitive drum unit is mounted to the developing unit or when the photosensitive roller is driven.