THERMAL GRADIENT MINIMIZATION

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a process for minimizing upward temperature drift of inboard areas on a fuser roll not used during the electrophotographic printing of small documents. Two lamps are used. Both lamps dissipate most of their power over half their length. The lamps are oppositely located so that when full-width paper is fed both lamps run at equal power to generate uniform heat across the full fuser roll. As the paper width decreases, the lamp with most of its power at the rear is run at lower power preventing the non-registration end of the fuser roll from becoming excessively hot. Control circuitry checks the paper size and orientation by use of software lookup tables to progressively reduce lamp power as the paper width decreases.

XEROX DISCLOSURE JOURNAL

THERMAL GRADIENT MINIMIZATION Proposed Classification Ian Pitts U. S. C1. 3991330

Int. C1. G03g 15/20

Disclosed is a process for minimizing upward temperature drift of inboard areas on a fuser roll not used during the electrophotographic printing of small documents. Two lamps are used. Both lamps dissipate most of their power over half their length. The lamps are oppositely located so that when full-width paper is fed both lamps run at equal power to generate uniform heat across the full fuser roll. As the paper width decreases, the lamp with most of its power at the rear is run at lower power preventing the non- registration end of the fuser roll from becoming excessively hot. Control circuitry checks the paper size and orientation by use of software lookup tables to progressively reduce lamp power as the paper width decreases.

DP5864

XEROX DISCLOSURE JOURNAL - Vol. 24 No. 5 September/October 1999 219

220 XEROX DISCLOSURE JOURNAL - Vol. 24 No. 5 September/October 1999