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US 7,029,738 B2Granted
System for discouraging the removal of identification labels adhered to a surface
AssigneesDinformatica del Noroeste S.A. de C.V., Centro de Investigacion en Materiales Avanzados, S.C.
InventorsAlfredo Aguilar Elguezabal, Luis de la Torre Sáenz, Alejandro López Ortiz, Manuel Román Aguirre, Oscar Ayala Valenzuela
Life of this patent
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Abstract
A card label having a system for discouraging its non-authorized removal and reuse, which initiate an incontrollable combustion process that completely damage the card label and its information and included circuitry when it is attempted to remove the card label from a surface.
Claims20
A system for discouraging the removal of identification labels adhered to a surface comprising:
- a base card with
- a first layer having a first and a second surface which are impregnated with an adhesive substance, wherein the first surface adheres to a product or desired surface;
- a second layer having a plurality of breakable blisters filled with a chemical activator substance, each adhered to the second surface of the first layer and evenly distributed over the second surface of the first layer, and a plurality of inserts having from between 30 to 70% in weight of a co-activator material, from between 1 to 15% in weight of a detonating material, from between 10 to 60% in weight of combustible material and from between 0.5% to 10% in weight of a stabilizer material, each insert adhered to the second surface of the first layer and surrounding a blister;
- and
- a third layer having a first and a second surface impregnated with an adhesive substance for adhering to each of the elements of the second layer,
- wherein, when it is attempted to separate the base card from the surface, a mechanical force is applied over the card that breaks one or more blisters and spills the activator chemical substance which reacts with the components of the surrounding insert and initiates an exothermic reaction that produce a combustion which permanently and severely damages the first, second and third layers.
3 more elements
Dependencies are inferred from the claim text.