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HEATED PRESSURE XEROGRAPHIC FUSER ROLL WITH REDUCED SAG AT LOWER POWER

IP.com Disclosure Number: IPCOM000026160D
Original Publication Date: 1990-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 56K

Publishing Venue

Xerox Disclosure Journal

Abstract

Liquid metal cores within the fuser and pressure rolls of a heat and pressure roll fuser system are described that provide reduced sag at lower power levels. Fuser "sag" or marginally acceptable image to paper fix is frequently encountered during very high volume copy runs. The liquid metal cores, such as certain bismuth eutetics, are selected to have a melting temperature in a range near the fusing temperature of the operating fuser and pressure rolls, such that the latent heat of fusion can be used to overcome heat shortage problems in long copy runs without increasing power requirements of the machine. It is estimated that the copy runs could be more than doubled in length before sagging occurs with about a four fold increase in the thermal mass of the roll system. The thermal fuser roller warm-up time would be expected to be increased several fold.

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XEROX DISCLOSURE JOURNAL

HEATED PRESSURE Proposed Classification XEROGRAPHIC FUSER ROLL U.S. C1.355/285 WITH REDUCED SAG AT LOWER
POWER
Don B. Jugle

Int. C1. G03g 15/00

rubber

Liquid metal cores within the fuser and pressure rolls of a heat and pressure roll fuser system are described that provide reduced sag at lower power levels. Fuser "sag" or marginally acceptable image to paper fix is frequently encountered during very high volume copy runs. The liquid metal cores, such as certain bismuth eutetics, are selected to have a melting temperature in a range near the fusing temperature of the operating fuser and pressure rolls, such that the latent heat of fusion can be used to overcome heat shortage problems in long copy runs without increasing power requirements of the machine. It is estimated that the copy runs could be more than doubled in length before sagging occurs with about a four fold increase in the thermal mass of the roll system. The thermal fuser roller warm-up time would be expected to be increased several fold.

XEROX DISCLOSURE JOURNAL - Vol. 15, No. 4 July/August 1990 259

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260 XEROX DISCLOSURE JOURNAL - Vol. 15, NO. 4 July/August 1990

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