The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1992
Filed:
Aug. 14, 1989
Raymond E Poehlein, Fairport, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A mechanical drive system with different load requirements is enabled by a motor whose input is varied in response to known changes in output torque requirements during various time segments of the duty cycle. In one example a fuser roll in a copier is driven by a DC stepper motor during a period in which a copy sheet is in the fusing area at a first speed V.sub.1. Upon completion of the fusing portion of the cycle, the fuser load requirements increase requiring a higher torque to be delivered by the motor. The change in fuser operation is determined by timing and an appropriate signal is sent to the control circuit reducing the motor speed, and allowing the motor to produce the additional torque required.