Security marking and security mark
First Claim
1. A gaming card having a security feature incorporated therein, said gaming card comprising:
- a gaming card; and
a conductive material located on said gaming card, said conductive material being formed as a patterned layer comprising identifying indicia;
wherein said patterned layer of identifying indicia is readable by a conductivity meter to provide a resistance value of at least a portion of said identifying indicia to impart a security feature to said gaming card.
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Accused Products
Abstract
The application discloses a security mark consisting of a plurality of layers, of which the cover layers are highly conductive films and the layers of the card core are films of varying transparency. One layer carries information, which can be read directly, if desired, above a security print, while the transparent conductive layer has an additional security markings, such as biometric or product identifiers marking which can be read conductively only with the aid of a special reader. All the layers consist of polymers, papers or mixtures which can be fused together to form a laminate which is fused together. The conductive layers form conductive traces which may be formed with single-walled or multi walled nano tubes or they can be formed from multiple layers or dispersions containing, carbon nano tubes, carbon nano tubes/antimony tin oxide, carbon nano tubes/platinum, or carbon nano tubes/silver, carbon, silver or carbon nano tubes/silver-cloride. An alternative layer can be formed from a separate conductive layer or suitable dispersion and the encoding accomplished by overlaying a nonconductive trace.
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Citations
25 Claims
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1. A gaming card having a security feature incorporated therein, said gaming card comprising:
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a gaming card; and a conductive material located on said gaming card, said conductive material being formed as a patterned layer comprising identifying indicia; wherein said patterned layer of identifying indicia is readable by a conductivity meter to provide a resistance value of at least a portion of said identifying indicia to impart a security feature to said gaming card. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A multi-layered structure for a security marking for a gaming card, said multi-layered structure comprising:
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a gaming card; an electrically conductive film comprising a plurality of nanotubes having outer diameters of less than 15 nm located on said gaming card; and a polymeric layer disposed on at least a portion of said electrically conductive film. - View Dependent Claims (23, 24)
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25. A gaming card security marking formed from a multi-layered structure, comprising:
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a gaming card; a plurality of nanotubes arranged to form an electrically conductive film disposed on said gaming card, said nanotubes having outer diameters of less than about 15 nm; and a polymeric layer disposed on at least a portion of said electrically conductive film; wherein said electrically conductive film is formed into resistive traces.
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Specification