LOWERING THE TEMPERATURE OF A FUSER PRESSURE ROLL
Original Publication Date: 1990-Jun-30
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
One of the difficulties encountered in pressure rolls used in roll fusers in electrostatographic printing is a shortfall in useful life. This frequently takes the form of groove formed in the roll at the path of the 11 inch paper edge such that when 14" paper is passed through the fuser the image in the grooved area is unfused. The problem may be so severe that the pressure roll must be flipped or reoriented inboard end to outboard end after a certain number of prints. The life of the pressure roll may be increased by making the fuser roll more conductive, thereby allowing the fuser roll to run at a lower temperature. Other temperature set points (e.g. standby) would also be lower. The thermal conductivity can be increased and still maintain a low surface energy surface by adding a material that is thermally conductive, preferably one that has a high aspect ratio. Carbon fibers, cupric oxide, boron nitride, nickel fibers, aluminum nitride, alumina or silicon carbide would perform the function well. With the lower set temperatures of the fuser roll the groove in the pressure roll does not form, and the life of the pressure roll is extended.