Inventors:
Douglas P. Connolly - Webster NY
Barry G. Rickett - Pittsford NY
Robert J. Yax - Springwater NY
Roger M. Swanson - Fairport NY
Assignee:
Xerox Corporation - Stamford CT
International Classification:
G06F 700
G03G 1500
Abstract:
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.