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. 08, 1995
Filed:
Apr. 29, 1994
Robert J Matoushek, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A method and apparatus for detecting defects in a dye donor web having repeating series of patch colors. If defective regions in a dye donor web are found during manufacture, an opaque mark is physically placed on a color patch of the repeating series in which the defect occurs. As the dye donor web is advanced, two beams of light of a color to which the color patch is transmittable impinge on the dye donor web. The beams are in substantial alignment in a direction transverse to the web path and are positioned such that the mark (if present) aligns with one of the two light beams and not the other beam. By sampling the transmission or non-transmission of the two light beams through the dye donor web, a signal can be generated whenever the simultaneous non-transmission of the one light beam and transmission of the other light beam is detected.