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:
May. 07, 2013
Filed:
Aug. 15, 2012
Nicholas Baxter, Northfordshire, GB;
Andrew Hill, Hertfordshire, GB;
Andrew Ashwood, Hertfordshire, GB;
Nicholas Gates, Hertfordshire, GB;
Robert Sanders, Hertfordshire, GB;
Andrew Williams, Hertfordshire, GB;
Nicholas Baxter, Northfordshire, GB;
Andrew Hill, Hertfordshire, GB;
Andrew Ashwood, Hertfordshire, GB;
Nicholas Gates, Hertfordshire, GB;
Robert Sanders, Hertfordshire, GB;
Andrew Williams, Hertfordshire, GB;
Xerox Corporation, Norwalk, CT (US);
Abstract
A paper feed system for use in a printing apparatus that detects multi-feeds and separates all sheets while allowing a single sheet to continue into the machine includes a nip with a drive roller for feeding sheets. A reversible pressure roller downstream of the drive roller is connected to a motor, but idles in the direction of the paper feed in normal operation. When a multi-feed is detected, the motor is turned ON and the reversible pressure roll actuated by a controller. The reversible pressure roller has more friction with the sheet in its contact than the friction between sheets. This drives the sheet in contact backwards.