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:
Oct. 26, 2010
Filed:
Jun. 21, 2005
Nidhi Sharma, Brampton, CA;
Petrus T. DE Koning, Toronto, CA;
Guillermo Aristizabal, Toronto, CA;
Raymond M. Ruthenberg, Toronto, CA;
Gary A. Faguy, Hamilton, CA;
Nidhi Sharma, Brampton, CA;
Petrus T. De Koning, Toronto, CA;
Guillermo Aristizabal, Toronto, CA;
Raymond M. Ruthenberg, Toronto, CA;
Gary A. Faguy, Hamilton, CA;
Xerox Corporation, Norwalk, CT (US);
Abstract
A paper feeder employs a retard roll mounted on a shaft that is controlled by a magneto rheological variable clutch. Current is adjusted to the magneto rheological variable clutch to produce a variable drag torque (from near zero to fully locked) on the retard roll. The current is adjusted based on various inputs, some of which include media type, temperature, humidity, media size, and transport speed. Variable drag on the retard roll results in a reduction in induced skew of sheet passing through a nip formed between the retard roll and a separation roll, as well as, less and more consistent wear of the retard roll.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile