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:
Aug. 30, 1994
Filed:
Dec. 17, 1993
Applicant:
Inventor:
Kathleen M Martin, Hamlin, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ; B65H / ;
U.S. Cl.
CPC ...
271111 ; 271121 ; 271126 ; 271147 ;
Abstract
A feed roll wear compensating method and apparatus measures the surface speed of the feed and nudger rolls that are rotated by a motor and adjusts the motor speed to prevent sheet damage from occurring. The surface speed of each of the rolls is measured by sensors that detect the position of a moving sheet and the signal from the sensors is used to deduce the reduction in diameter of the rolls due to wear. The roll wear information is used to adjust the nominal elevator height to maintain constant force on the sheets and to provide feedback for adaptive control of the feed motor to adjust the speed of the feed roll.