G - Physics – 06 – K
Patent
G - Physics
06
K
358/5, 354/57
G06K 5/00 (2006.01) A61N 5/00 (2006.01) G01N 23/223 (2006.01) G06K 9/00 (2006.01)
Patent
CA 1132262
ABSTRACT OF THE DISCLOSURE A marker element such as barium in the form of barium sulphate is incorporated in place of part of the filler in intaglio ink used in bank notes. To determine whether a bank note is valid, either in a note sorter or in a separate unit, part of the note is illuminated with X-rays and the resultant fluorescent X-rays are detected and counted. Different note denominations can have different combinations of markers to produce different fluorescent X-ray energies, which can be detected and analyzed to control sorting of the notes into the respective denominations in a mechanical note sorter operating at high speed. This arrangement permits detection of worn notes and notes which are stuck together, as well as detecting counterfeit notes.
338500
Bank Of Canada
Gowling Lafleur Henderson Llp
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