LAYERED SOFT FUSER ROLL WITH OIL-RESISTANT ELASTOMER COATING
Original Publication Date: 1983-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
The figure illustrates a soft roll fusing system for fixing a toner image formed on a support sheet in an electrostatographic process. The soft fuser roll is in fusing engagement with a support sheet 12 having a toner image 14, the support sheet being supported by backup roll 16. The soft fuser roll 10 comprises a rigid core 18 with an internal heat source such as lamp 20 surrounded by a soft thermally conductive elastomer layer 22 which is covered with a second elastomer layer 24 which is more highly crosslinked and/or reinforced than the inner layer. With this structure the outer layer is better able to resist swelling and permeation by the fuser oil and since it is more highly reinforced it is better able to resist abrasion. In this way, the outer layer protects the inner thermally conductive layer from the effects of oil and abrasion. In a specific embodiment the rigid core may he a copper tube, the inner layer a silicone rubber or fluoroelastomer of high thermal conductivity and stability and the outer layer may be of Viton GH, for example.