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:
Sep. 25, 2007
Filed:
Dec. 14, 2005
Herb Mosteller, Brandamore, PA (US);
Edward M. Zoladz, Jr., West Chester, PA (US);
Kenneth B. Wood, Downingtown, PA (US);
David C. Deaville, West Chester, PA (US);
Herb Mosteller, Brandamore, PA (US);
Edward M. Zoladz, Jr., West Chester, PA (US);
Kenneth B. Wood, Downingtown, PA (US);
David C. Deaville, West Chester, PA (US);
MEI, Inc., West Chester, PA (US);
Abstract
An apparatus for document processing comprises an optical sensor including a light source, a light detector and an optical element. The optical sensor is adapted so that, during operation of the apparatus, at least a first portion of light from the source that enters the optical element travels along paths in the optical element so as to be re-directed by total internal reflection toward the detector and wherein the total internal reflection is maintained when the optical element is wet. Signals form the optical sensor may be used to determine, for example, the state of a document storage cassette or the location of a document with respect to the cassette.