PRESSURE PAD FOR FUSER
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
In certain heated fuser systems, such as those found in the VersatecB 8836 Laser Plotter and the Xerox @ 2510 and 2520 Engineering Copiers, media is forced against a heated fuser roll by a pressure element. Generally, the element is a resilient pressure blade, similar to the one indicated by reference numeral 12 in the figure, which represents a side view of such a heated fuser system. During the fusing process, the imaged side of media 14 is forced against fuser roll 16 by the lower end of blade 12. The media is guided into the fuser nip by sling element 20, which also supports the lower end of blade 12. It has been determined that when media is fed beneath the pressure blade and sling, there is a tendency for the media to pucker and lose contact with the fuser roll at a point immediately following the pressure blade. This behavior is particularly prevalent when a polyester film is used for the media. Generally, the loss of contact results in distortions and poorly fused streaks that appear in the high density solid areas of the image.