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:
Jul. 27, 1993
Filed:
Apr. 22, 1992
Hitoshi Nakai, Nagoya, JP;
Yasushi Okabe, Nagoya, JP;
Shusaku Tsusaka, Nagoya, JP;
Soichiro Nishimura, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
One unit type processing unit to be assembled in a laser printer for facilitating replacement work. The processing unit houses therein a photosensitive drum with a part being exposed, a charging unit, a developing unit and cleaning unit. The processing unit is also provided with a flexible protective cover for covering the exposed area of the photosensitive drum when an upper frame of the laser printer is opened. The protective cover can be rolled into a compact configuration and is positioned in a dead space at a position beside the exposed area when the cover is moved away from the exposed area and when the upper frame is closed for printing operation. The rolled cover is stretchable to cover the exposed area when the upper frame is opened.