Security thread detector assembly

G - Physics – 06 – K

Patent

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Details

G06K 7/08 (2006.01) G07D 7/00 (2006.01)

Patent

CA 2201306

A security thread detector assembly for reading a security thread (1) carried by a security document and coded such that each of a succession of segments along the thread represents a digital value, the particular digital value being represented by the particular characteristic of the respective segment comprises a head (3) having a multiplicity of parallel reading channels (8) having a track pitch which is substantially less than the length of a segment and being disposed to read the document such that the thread (1) is substantially broadside to the channels, whereby all the segments are sensed substantially simultaneously and each segment is represented by a plurality of samples.

Ensemble détecteur de fil de sécurité utile pour lire un fil de sécurité (1) situé sur un document de sécurité et codé de sorte que chacun des segments successifs formant le fil représente une valeur numérique, cette valeur numérique spécifique étant représentée par la caractéristique spécifique du segment respectif. Cet ensemble détecteur comprend une tête (3) comportant plusieurs canaux (8) de lecture parallèles dont le pas transversal est sensiblement inférieur à la longueur d'un segment, ladite tête étant elle-même positionnée pour lire le document de manière à ce que le fil (1) soit sensiblement transversal aux canaux afin que tous les segments soient détectés sensiblement simultanément et que chaque segment soit représenté par une pluralité d'échantillons.

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