Browse Prior Art Database

METHOD FOR MANUFACTURING SLEEVED ROLLS

IP.com Disclosure Number: IPCOM000024311D
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 126K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to sleeved rolls and more particularly, to a method of manufacturing sleeved fuser rolls or pressure rolls for a fusing apparatus utilized in fixing toner images to support sheets in a xerographic copying apparatus wherein the roll comprises a rigid core and an outer layer over the rigid core, the outer layer preferably comprising a fluorocarbon polymer. In more preferred embodi-ments, the fluorocarbon polymer is a copolymer of perf luoroalkyl perf luorovinyl ether with tetrafluoroethylene. The outer sleeve layer is placed over the core in the form of a heat-shrinkable sleeve comprising the copolymer material. In U.S. Patent 3,912,901, copolymers of perfluoroalkyl perfluorovinyl ether and tetra-fluoroethylene are placed as an outer sleeve material over a silicone rubber resilient material adhered to the core of a pressure roll for a xerographic apparatus.

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IEROX DISCLOSURE JOURNAL

Proposed Classification
U.S. C1. 219/216 Int. C1. H05b 1/00

Frank P. Sgabellone
Edward G. Williams

This disclosure relates to sleeved rolls and more particularly, to a method of manufacturing sleeved fuser rolls or pressure rolls for a fusing apparatus utilized in fixing toner images to support sheets in a xerographic copying apparatus wherein the roll comprises a rigid core and an outer layer over the rigid core, the outer layer preferably comprising a fluorocarbon polymer. In more preferred embodi- ments, the fluorocarbon polymer is a copolymer of perf luoroalkyl perf luorovinyl ether with tetrafluoroethylene. The outer sleeve layer is placed over the core in the form of a heat-shrinkable sleeve comprising the copolymer material. In U.S. Patent 3,912,901, copolymers of perfluoroalkyl perfluorovinyl ether and tetra- fluoroethylene are placed as an outer sleeve material over a silicone rubber resilient material adhered to the core of a pressure roll for a xerographic apparatus.

In accordance with the present disclosure, the preferred sleeve materials are thermoplastic resins or polymers which are fabricated into sleeves, the preferred resins or polymers being fluorocarbon polymers and more preferably copolymers of perf luoroalkyl perf luorovinyl ether and tetraf luoroethylene. The copolymer of perfluoroalkyl perfluorovinyl ether with tetrafluoroethylene can also be used as a hot melt adhesive. This adhesive property of the copolymer permits the application of the sleeve material made thereof directly to the core or substrate of a roll without an additional adhesive or primer material.

The thermoplastic resin material is placed upon the surface of the substrate or core by shrinking a heat-shrinkable sleeve thereof or by wrapping a film thereof upon the substrate or core, and thereafter the sleeved substrate or core is heated above the melt temperature of the thermoplastic resin or polymer in conjunction with pressure to bond the thermoplastic resin or polymer to the core or substrate. The application of heat and pressure in accordance with the present disclosure is achieved by using the differences in expansion of two materials placed over the sleeve or film upon the core or substrate. Exemplary of these materials having different thermal expansion are tetrafluoroethylene polymer (Teflon) and steel.

After the thermoplastic resin or polymer is applied to the core or substrate, the ex...