Xerox Corporation

Barry G Rickett

Kenneth R Rasch

Roger M Swanson

Douglas P Connolly

Frederick C DeBolt

Robert John Yax

Mark T Miller

A method and apparatus for compensating for variations in input line frequency from the nominal line frequency. The method and apparatus utilize the difference between the number of zero crossings at the input line frequency and at the nominal frequency for a predetermined period of time to compensate for any variation in the input line frequency in order to synchronize timing related events.

Compensation for line frequency variation

Apparatus and method for applying offset preventing liquid to a fuser roll including an oil impregnated web member adapted to be moved by a motor from a supply core to a take up core; and a control to vary the duty cycle operation of the motor to drive the web member at a relatively constant liner speed at a contact nip, the control including a timer to monitor the cumulative time of operation of the motor and to progressively decrease the duty cycle of the motor in response to the cumulative time of operation wherein the progressively decreased duty cycle of operation compensates for the increasing radius of the web member on the take up core to maintain the relatively constant linear speed at the contact nip.

Method and apparatus for controlling the application of a fuser release

Customer billing system for electrostatographic reproducing machines in which a replaceable copy cartridge provides a guaranteed number of copies or prints, each cartridge having an integral copy counter which, on reaching a predetermined copy count, is disabled, rendering the cartridge dead and activating an additional copy counting mechanism for counting a limited number of grace copies that can be made using the dead cartridge, after which further operation of the machine is prevented until a new cartridge is installed.

Growing community of inventors

Pittsford, NY, United States of America

Barry G Rickett