Patent ID: 7570894
Filing Date: 2009-08-04
Classification: G03G

Abstract:
1. An electrostatographic printer with a fusing apparatus, including an apparatus for maintaining print quality based on temperature measurements, said apparatus comprising: a. a heated fusing member, including a power supply for controlling temperature of the fuser, for fusing toner to sheets of receiver media; b. one or more measurement devices to measure temperature-related information; c. a pressure member in contact with the heated fusing member to form a fusing nip there between; d. a machine controller for changing fusing nip widths in accordance with the type of receiver media and the image on the media; e. a heating member controller associated with the machine controller, for changing temperature of the heated fusing member; f. a pressure member nip controller associated with the machine controller, for changing nip width between the pressure member and the heated fusing member; g. a processing system device for calculating a quality adjustment range based on current process measurements and a thermal load related set-point, or a derivative thereof, indicative of print quality; h. a comparator wherein a first information, or a derivative thereof, is compared to the calculated quality adjustment range, or a derivative thereof, indicative of print quality; i. an adjuster to adjust the current conditions so they trend towards a new thermal load set point within the quality adjustment range in a controlled manner; and j. a controller for controlling the temperature based on the comparison based on the comparator and/or the adjuster.