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. 17, 2001
Filed:
Dec. 09, 1999
Karen M. Rumsey, Cary, NC (US);
Clifford L. George, Geneseo, NY (US);
Antonio L. Williams, Rochester, NY (US);
Susan E. F. Dunn, Mohegan Lake, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
An apparatus and method of making very small curvature modifications of the reflective surface of a mirror in a printer raster scanning system for bow correction of the scanning beam by gripping edges of the mirror to bend it with a gripping system and applying a very small movement thereto by gross rotation of screw shaft of a differential screw system operatively connected to that gripping system. The screw shaft has two separate fine screw thread patterns of slightly different screw pitches causing gross rotation of the screw shaft to only move the mirror gripping system and its engaged portion of the mirror by micro-meter amounts by automatically subtracting the two slightly different screw pitches from one another, thus providing very small, easily controlled, deformation of the mirror plane for bow correction by non-critical gross rotation of the screw shaft.