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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
Document File: 2 page(s) / 47K

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.

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IEROX DISCLOSURE JOURNAL

PROCESS CONTROL OF MACHINE COPY RATE TO ENABLE OPTIMUM ENERGY EFFICIENT PRODUCTIVITY
P. H. Dundas
N. A. Miller

Proposed Classification
U.S. c1. 355/3 Int. CI. G03g 15/00

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.

Volume 8 Number 2 March/April 1983 129

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March/April 2 Number 8 Volume XEROX 130 DISCLOSURE JOURNAL 1983

[This page contains 1 picture or other non-text object]