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:
Jan. 15, 1980
Filed:
Dec. 07, 1977
Gerald Iannadrea, Painesville, OH (US);
Robert L Gorgone, Mentor, OH (US);
Ardac, Inc., Willoughby, OH (US);
Abstract
Disclosed is apparatus for determining the authenticity of paper purported to be valid currency or the like. The invention includes a sliding tray which is adapted for receiving the paper. Maintained above the tray are a light source and three photocells. The light source casts light upon the paper as the tray is passed thereunder and light is reflected from the paper's surface onto two of the photocells. Appropriate filtering causes each of the two photocells to respond to different wavelengths of light reflected from the paper, these wavelengths corresponding to colors known to be present along the path traveled by the paper as it passes under the photocells. The outputs of the photocells are thus indicative of the presence and relative positions of colored areas upon the surface of the paper. Circuitry is included to receive and compare the outputs of the photocells with each other and with the output of a reference photocell, thereby determining the authenticity of the paper. The apparatus may be used in conjunction with a reticle validation test apparatus as a secondary validation test.