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FULLY ENCLOSED AND/OR EVACUATED POLYGON MOTOR ASSEMBLY MOTOR

IP.com Disclosure Number: IPCOM000025889D
Original Publication Date: 1988-Oct-31
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

Referring to the drawing Figure, the polygon of a raster output scanner rotates at a very high RPM, i.e., 22,000 RP91. At that speed, the polygon acts as a blower impeller creating air currents which cause contamination, air induced inertia, friction losses, and wobble. To prevent this, a quartz or glass window 5 is provided to cover the laser beam opening 6 in the polygon housing 1 to seal the housing and allow the housing to be evacuated.