Banknotes and the like
OwnerDavid H. Solomon, John B. Ross +2inventors
InventorsDavid H. Solomon, John B. Ross, Mario Girolamo, Robert A. Brett
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Abstract
A security token, such as a bank note or identity card, comprises a sheet-like substrate made up from film of transparent bi-axially oriented polymer coated with layers of opaque and heat activated adhesive material. The opaque layer is applied in such a way as to leave a transparent area for inspection of a security device, for example, a diffraction grating, incorporated in the polymer film. The substrate may bear printed or other identifying indicia and is protected with an intimately bonded layer of transparent polymeric material.
Claims12
A token comprising a flexible film substrate bearing identifying indicia and including an optically variable security device, characterised in that the substrate comprises a transparent bi-axially-oriented polymeric film composite having a heat-activated adhesive coating and an opacifying coating on at least one side, said substrate, indicia and the security device being covered with a transparent protective layer of polymeric material intimately heat-bonded to the substrate.
Dependencies are inferred from the claim text.