Wash destructible resonant tag

G - Physics – 08 – B

Patent

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Details

G08B 13/24 (2006.01)

Patent

CA 2697869

A resonant tag for use with a radio-wave detection system for the prevention of shoplifting or the like, which has a coil and capacitor circuit formed on opposite sides of an extremely thin substrate of a biaxially-oriented polypropylene, with one of the capacitor plates formed on one side of the substrate and the coil and other capacitor plate formed on the other side of the substrate, and paper layers on both sides of the tag, whereby the circuit is destroyed when the tag is washed in water or dry cleaned.

L'invention concerne une étiquette résonante, destinée à être utilisée avec un système de détection d'ondes hertziennes pour la prévention du vol à l'étalage ou similaire, laquelle comprend un circuit LC formé sur les côtés opposés d'un substrat extrêmement fin constitué d'un polypropylène à orientation biaxiale, l'une des plaques du condensateur étant formée sur un côté du substrat et la bobine et l'autre plaque du condensateur étant formées sur l'autre côté du substrat, et des couches de papier sur les deux côtés de l'étiquette, ce par quoi le circuit est détruit lorsque l'étiquette est lavée dans de l'eau ou nettoyée à sec.

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