Back to results
US 5,851,615 AGranted
Tamper indicating security item and joining method
AssigneeDe La Rue International Limited
InventorRalph Kay
Life of this patent
Estimating the term…
Abstract
A tamper indicating security item such as a shrink wrap seal comprises a substrate including an optically variable effect generating structure such as an embossed hologram. Each surface of the substrate carries an adhesive having a strength such that after the substrate has been adhered to a surface it cannot be removed without damaging the optically variable effect generating structure.
Claims20
A heat shrink packaging material comprising a heat shrinkable film;
- and a tamper indicating security item comprising a substrate including a surface relief structure which generates an optically variable effect, each surface of the substrate carrying an adhesive layer the item being secured to the film by one of the adhesive layers, each adhesive layer having a strength such that after the substrate has been adhered to a surface it cannot be removed without damaging the optically variable effect.
Dependencies are inferred from the claim text.