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IP.com Disclosure Number: IPCOM000026178D
Original Publication Date: 1990-Oct-31
Included in the Prior Art Database: 2004-Apr-05

Publishing Venue

Xerox Disclosure Journal


In a Raster Output Scanner (ROS) containing a scanning polygon, noise and contamination may be a problem. Typically, the polygon is spinning in open space. To reduce the noise and contamination in the system, one can enclose the polygon in a sealed chamber containing a cavity with enough room for the polygon to spin freely. Further, one can reduce the excess space both above and below the polygon in the cavity along with indenting the cavity to follow the indentations on the polygon thus creating a labyrinth seal structure around the polygon. This labyrinth seal reduces noise, contamination, and viscous effect around the polygon.