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:
Aug. 28, 1990
Filed:
Dec. 22, 1988
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350-65 ; 350637 ; 355 61 ;
Abstract
A moving apparatus for an optical system is a duplicating machine is arranged as to effect a scanning operation of document images through the movement of two units of mirror platforms respectively. One of the platform moves at a scanning speed while the other platform moves at one half scanning speed. A stator for a polyphase brushless motor is provided along the moving direction of the apparatus on both the side portions of the moving region of each mirror platform. Two sets of rotors of core-less coils operatively react with the stator to form polyphase brushless linear motors. The mirror platforms are driven by the motors at their center of gravity.