H - Electricity – 01 – F
Patent
H - Electricity
01
F
H01F 1/03 (2006.01) B42D 15/10 (2006.01) G01R 33/12 (2006.01) G07D 7/00 (2006.01)
Patent
CA 2246304
The present invention relates to a method and an apparatus for detecting the presence of particles in a substrate the base material of which has electromagnetic properties substantially dif-fering from the corresponding electromagnetic properties of the particles. The invention also relates to the particles and to the substrate com-prising such particles which allow to recognise easily a document as being a genuine security document in order to prevent the document from being copied or in order to contribute to its au-thentication.
Cette invention concerne un procédé et un appareil qui permettant de détecter la présence de particules dans un substrat. Le matériau de base de ce substrat possède des propriétés électromagnétiques qui diffèrent sensiblement des propriétés électromagnétiques correspondantes desdites particules. Cette invention concerne également ces particules ainsi que le substrat qui contient de telles particules. Il est ainsi possible d'identifier facilement un document comme étant un document sécurisé original, ceci afin d'éviter qu'il ne soit copié ou afin de contribuer à son authentification.
Burrell Jonathan
Doublet Pierre
Fisher John
Robertson Paul Andrew
Arjo Wiggins
Arjo Wiggins S.a.
N.v. Bekaert S.a.
Robic
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