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. 21, 2001
Filed:
Oct. 29, 1999
Applicant:
Inventors:
Eliud Robles-Flores, Webster, NY (US);
Edward W. Schnepf, Ontario, NY (US);
Douglas A. Gutberlet, Macedon, NY (US);
Carl H. Hall, Shortsville, NY (US);
Randall C. Ryon, Victor, NY (US);
James B. Myers, Fairport, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 7/06 ; G01B 7/14 ; B65H 7/06 ; B65H 7/12 ; B41J 1/302 ;
U.S. Cl.
CPC ...
G01B 7/06 ; G01B 7/14 ; B65H 7/06 ; B65H 7/12 ; B41J 1/302 ;
Abstract
A device that can sense small changes in distance between opposed surfaces includes a ferromagnetic material and a giant magneto resistance effect sensor. A current source applies a current to the sensor to operate the sensor and read the magnetic field that impinges on the sensor from the ferromagnetic material. The magnetic field changes when the distance between the opposed surfaces changes. The device can be used in imaging apparatus to sense multifeeds and other conditions.