Anti-counterfeit security object and methods for its...

B - Operations – Transporting – 42 – D

Patent

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Details

B42D 15/00 (2006.01) B42D 15/10 (2006.01) G07D 7/12 (2006.01)

Patent

CA 2571512

The security object comprises a substrate (1a), a surface structure (6) and a hologram layer (5). A volume hologram (7) is arranged in the hologram layer (5). The hologram layer (5) is deformed inhomogeneously by the surface structure (6), which gives rise to readily detectable changes in the reflections from the volume hologram (7). These changes can be used to verify the authenticity of the object. The surface structure (6) can e.g. be applied using intaglio printing techniques or embossing. Alternatively or in addition to the deformation of the hologram layer (5) by means of the surface structure (6), the hologram layer (5) may also be deformed by embossing.

La présente invention a trait à un objet de sécurité comportant un substrat (1a), une structure de surface (6) et une couche d'hologramme (5). Un hologramme volumique (7) est disposé dans la couche d'hologramme (5). La couche d'hologramme (5) est déformée de manière non homogène par la structure de surface (6), qui produit certaines modifications aisément détectables dans les réflexions à partir de l'hologramme volumique (7). Ces modifications peuvent être utilisées pour la vérification de l'authenticité de l'objet. La structure de surface (6) peut, par exemple, être appliquée au moyen de techniques d'impression en creux ou la gravure en relief. En variante ou en supplément à la déformation de la couche d'hologramme (5) par la structure de surface (6), la couche d'hologramme (5) peut également être déformée par la gravure en relief.

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