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. 27, 1993
Filed:
Apr. 10, 1991
Applicant:
Inventors:
Takaaki Yano, Kawagoe, JP;
Masahide Inoue, Saitama, JP;
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359196 ; 359216 ; 359218 ; 346108 ; 346160 ; 355 30 ; 355233 ;
Abstract
In a laser scanning system employed in an electrophotographic image forming apparatus there are provided a polygon mirror moveably driven in order to enable a laser beam to repeatedly scan a predetermined range and a mirror for reflecting the scanning laser beam to a photoconductive drum in a casing. The casing is separated by a heat insulating member in order to prevent circulation of air therein. Further, a covering member is arranged around the polygon mirror, so as to restrict the occurrence of air flow in the casing due to the movement of the polygon mirror.