LOW-COST FUSING SYSTEM
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
This invention relates to a low-cost fusing system for an electrostatographic copying machine in which the conventional devices for dispensing a predetermined amount of a release agent can be eliminated. In the novel fusing system, the fuser roll has a thin layer of a silicone elastomer as an overcoat. The silicone elastomer is in a state of polymerization equilibrium between low-molecular weight cyclical homologs and the high-molecular weight silicone elastomer. Initially, the low-molecular weight materials can be stripped out by heating the fuser roll to its normal operating temperature, approximately 400 to 450 degrees Fahrenheit under vacuum. When such a fuser roll is subsequently heated to its operating temperature in its normal operating environment, low-molecular weight materials will be formed and released which may serve the functions of a release agent. The silicone elastomer is made to be extremely resistant to oxidative crosslinking by the presence of finely divided iron oxide (Fe 03). The finely divided iron oxide is generated in situ by the thermal decompos6ion of iron pentacarbonyl that had been dispersed into the silicone base material.