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Browse Prior Art Database

FUSER ROLL WITH HIGH LATERAL THERMAL CONDUCTIVITY

IP.com Disclosure Number: IPCOM000026576D
Original Publication Date: 1992-Oct-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 64K

Publishing Venue

Xerox Disclosure Journal

Abstract

A fuser roller having high lateral thermal conductivity for use in fusing for electrophotographic printing and copying applications is disclosed. A common problem encountered which limits the life expectancy of a fuser roller involves repetitive and extended fusing of copy sheets which are considerably smaller than the overall length of the fuser roller. Those regions of the fuser roller which do not contact the copy sheet tend to deteriorate more quickly because of excessive heat buildup in those regions in the absence of heat transfer to the copy sheet. The solution to the fuser roller life problem involves embedding heat pipes or rod shaped members parallel to the long axis of the roller and within the circumference of the fuser roller cylindrical geometry. The use of heat pipes in the fuser roller provides for a minimum temperature gradient across the fuser roller and thereby improves the fuser roll life and increases the efficiency of the fuser roller, that is, less wasted heat through either radiation or conducts to areas other than the copy sheet.

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XEROX DISCLOSURE JOURNAL

FUSER ROLL WITH HIGH LATERAL THERMAL CONDUCTIVITY
Edward F. Grabowski

Proposed Classification
U.S. C1.355/285 Int. Cl. G03g 15/00

A fuser roller having high lateral thermal conductivity for use in fusing for electrophotographic printing and copying applications is disclosed. A common problem encountered which limits the life expectancy of a fuser roller involves repetitive and extended fusing of copy sheets which are considerably smaller than the overall length of the fuser roller. Those regions of the fuser roller which do not contact the copy sheet tend to deteriorate more quickly because of excessive heat buildup in those regions in the absence of heat transfer to the copy sheet. The solution to the fuser roller life problem involves embedding heat pipes or rod shaped members parallel to the long axis of the roller and within the circumference of the fuser roller cylindrical geometry. The use of heat pipes in the fuser roller provides for a minimum temperature gradient across the fuser roller and thereby improves the fuser roll life and increases the efficiency of the fuser roller, that is, less wasted heat through either radiation or conducts to areas other than the copy sheet.

Reference

A related fusedpressure roll concept employing a liquid metal core to reduce fuser 'sag' has been disclosed by Don B. Jugle in the Xerox Disclosure Journal, Vol. 15, No. 4, July/August 1990, page 259.

XEROX DISCLOSURE JOURNAL - Vo1.17 No. 5 SeptembedO...