B - Operations – Transporting – 42 – D
Patent
B - Operations, Transporting
42
D
B42D 15/00 (2006.01)
Patent
CA 2337787
A security thread (2), for identification of security documents such as banknotes, has a magnetic layer (4) sandwiched between polymeric layers (6, 8), where one of the layers (8) is a piezoelectric layer such as PVDF. The piezoelectric layer (8) may be poled intermittently such the piezoelectric layer is coded. A particularly compact security thread with enhanced multiple coded features is thus provided.
L'invention concerne un fil de sécurité (2), pour l'identification de documents de sécurité tels que des billets de banque, comporte une couche magnétique (4) prise en sandwich entre des couches polymères (6, 8) dont une (8) est une couche piézoélectrique, par exemple en PVDF. La couche piézoélectrique (8) peut être polarisée par intermittence de sorte qu'elle soit codée. On produit ainsi un fil de sécurité particulièrement compact à caractéristiques codées multiples améliorées.
Brown Richard Hunter
Chorley Brian
Yaskowski Joseph Francis
Measurement Specialties Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
The Governor And Company Of The Bank Of England
The Whitaker Corporation
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