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PROCESS CONTROL OF MACHINE COPY RATE TO ENABLE OPTIMUM ENERGY EFFICIENT PRODUCTIVITY

IP.com Disclosure Number: IPCOM000025004D
Original Publication Date: 1983-Apr-30
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

In an electrophotographic printing machine, the energy required by the fuser to permanently affix the toner powder image to the copy sheet is a function of the area converted by the toner powder image. Typically, the fuser is designed for a worst case situation, i.e., 100% area coverage. In order to reduce powder requirements, the percentage of the original document having information thereon can be evaluated by an area coverage sensor. This information is transmitted to the printing machine logic which, in turn, adjusts the process speed, photoreceptor, electrical characteristics, developer bias, transfer current and fuser power levels to optimize copy throughput for the measured area coverage. In this way, machine power requirements are minimized.