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HIGH SPEED ROS, NEGATIVE PRESSURE DEVICE

IP.com Disclosure Number: IPCOM000026632D
Original Publication Date: 1993-Feb-28
Included in the Prior Art Database: 2004-Apr-06

Publishing Venue

Xerox Disclosure Journal

Abstract

Referring to the drawing Figure, the polygon 2 of a raster output scanner rotates at a very high RPM, i.e., 22,000 RPM. At that speed, the polygon acts as a blower impeller causing a negative pressure to form in the polygon housing 1 and around the polygon. Air is drawn through the support bearings 4, 5 and through the wire opening 6 into the housing 1. During polygon operation, the bearing grease may become atomized and when this occurs, the aforedescribed air flow created by the high speed rotation of polygon 2 can ease out through the laser beam opening in the housing and onto