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:
Sep. 01, 1992
Filed:
Oct. 30, 1990
Tsuyoshi Ohashi, Hashima, JP;
Shinichi Hirahata, Kagamigahara, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An exposing device for scanning a photosensitive drum with a laser beam includes a laser beam emitter, a polygonal mirror, a mirror motor and a controlling unit having a timer circuit. The laser beam emitter emits a laser beam based on information of an image. The polygonal mirror deflects the laser beam emitted from the laser beam emitter to the photosensitive drum. The mirror motor rotates the polygonal mirror. When the exposing operation is executed, the controlling unit drives the mirror motor and the laser beam emitter. The photosensitive drum is thus scanned by the laser beam and is exposed. The controlling unit stops the driving of the laser beam emitter when the scanning of the photosensitive drum is finished. The controlling unit continually drives the mirror motor during a predetermined time from the end of the scanning of the photosensitive drum. The controlling unit stops the driving of the mirror motor after the predetermined time passes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile