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:
Nov. 16, 1993
Filed:
Aug. 07, 1992
William S Cumberledge, Scottsdale, AZ (US);
Damon L Morgan, Phoenix, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A reprographic media detector having a source of electromagnetic radiation (12) aimed at a reflector (17) is provided. A first detector (13) is positioned near the paper path for detecting electromagnetic radiation reflected from the reflector and a first portion of the paper path. A second detector (14) is positioned near the paper path for detecting electromagnetic radiation reflected from the reflector and a second portion of the paper path. Outputs of the first detector (13) and the second detector (14) are differentially amplified to produce an output signal indicating when an edge of a media sheet is illuminated by the source of electromagnetic radiation (12).