G - Physics – 07 – D
Patent
G - Physics
07
D
G07D 7/18 (2006.01) G07D 7/12 (2006.01)
Patent
CA 2735363
A document of value is provided comprising a soil or wear level test feature for determining whether the document of value is soiled. The soil or wear level test feature comprises: a reference area comprising a first region of the document; and a measurement area comprising a second region of the document. The reflectance of the measurement area is affected differently by the presence of soil or wear to that of the reference area, such that the difference in reflectance between the reference area and the measurement area provides an indicator of the degree of soiling or of the degree of wear of the document of value. Also provided is a method for detecting the soil or wear level of a document of value.
Linvention concerne un document de valeur doté dune fonction de test du niveau de souillure ou dusure permettant de déterminer si ledit document de valeur est souillé. Cette fonction de test du niveau de souillure ou dusure comporte : une zone de référence composée dune première partie du document et une zone de mesure composée dune deuxième partie du document. La réflectance de la zone de mesure est différente de celle de la zone de référence en raison de la présence de souillure ou dusure, de telle sorte que la différence de réflectance de la zone de mesure et de la zone de référence constitue un indicateur du degré de souillure ou du degré dusure du document de valeur. Linvention concerne également un procédé de détection du niveau de souillure ou dusure dun document de valeur.
Haley Jane
Howland Paul
Ratnukumar Rohan
Borden Ladner Gervais Llp
de La Rue International Limited
LandOfFree
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