A fusing apparatus includes a fuser roll and a pressure roll which define a nip therebetween. Two heating elements heat the fuser roll. One of the heating elements is configured for heating a first portion of the fuser roll while a second of the heating elements is configured for heating a second portion...http://www.google.com/patents/US7412181?utm_source=gb-gplus-sharePatent US7412181 - Multivariate predictive control of fuser temperatures
