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. 14, 2008
Filed:
Jan. 31, 2005
Raymond M. Ruthenberg, Toronto, CA;
Mark Muzzin, Brampton, CA;
John Wojtkowicz, Bath, CA;
Karen Lee, Brampton, CA;
Michel Loiselle, Brampton, CA;
David C. Van Wyngaarden, Toronto, CA;
Raymond M. Ruthenberg, Toronto, CA;
Mark Muzzin, Brampton, CA;
John Wojtkowicz, Bath, CA;
Karen Lee, Brampton, CA;
Michel Loiselle, Brampton, CA;
David C. van Wyngaarden, Toronto, CA;
Xerox Corporation, Norwalk, CT (US);
Abstract
An apparatus monitors the motion of sheet, such as in a digital printer. An optical sensor is capable of recording an image in a two-dimensional array of pixels, and has acuity to recognize a terrain of a small area on a sheet that is substantially blank to a human eye. The optical sensor views a portion of a sheet moving in a process direction through a path. A detection system compares at least two recorded terrain images from the sheet, thereby directly measuring velocity and direction of the sheet.