Ink with cohesive failure and identification document including same
First Claim
1. An identification document comprising:
- a core including a front surface and a back surface;
an over-laminate including a front surface and a back surface, the back surface being adjacently positioned with said core front surface; and
ink provided on at least one of the front surface of the core and the back surface of the over-laminate, wherein the ink is characterized by including substantially the same degree of adhesion to both the front surface of the core and to the back surface of the over-laminate, and wherein the adhesion of the ink to the front surface of the core and the adhesion of the ink to the back surface of the over-laminate is each relatively stronger than a cohesive strength of the ink.
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Accused Products
Abstract
The present invention provides ink that is designed to cohesively fail upon a de-lamination attack. A resulting failure pattern is preferably difficult to predict. The ink is applied to an identification document including a core and laminate layer. The ink is characterized such that an adhesive strength of the ink to the core and an adhesive strength of the ink to the laminate layer is each greater than the cohesive strength of the ink itself. Thus, the ink rips apart in a somewhat random-like manner upon a de-lamination attack. The ink can be arranged in interwoven or interlocking patterns or in other desired patterns and locations.
47 Citations
20 Claims
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1. An identification document comprising:
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a core including a front surface and a back surface;
an over-laminate including a front surface and a back surface, the back surface being adjacently positioned with said core front surface; and
ink provided on at least one of the front surface of the core and the back surface of the over-laminate, wherein the ink is characterized by including substantially the same degree of adhesion to both the front surface of the core and to the back surface of the over-laminate, and wherein the adhesion of the ink to the front surface of the core and the adhesion of the ink to the back surface of the over-laminate is each relatively stronger than a cohesive strength of the ink. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of making a tamper-resistant identification document comprising the steps of:
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providing a core including a top surface;
providing a top laminate including a top surface and bottom surface;
providing ink on at least one of the top surface of the core and the bottom surface of the top laminate, wherein the ink is characterized by having a relatively lower cohesion strength as compared to each of an adhesion strength between the ink and over-laminate and to an adhesion strength between the ink and the core. - View Dependent Claims (18)
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19. A method of providing security for an identification document, the document comprising a substrate and a laminate, the method comprising the steps of:
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providing the substrate and laminate;
providing an optical variable ink in a first location on the substrate or laminate, wherein the optical variable ink includes a first component that reflects light at a first viewing angle, and a second component that reflects light at a second viewing angle;
wherein the optical variable ink is provided such that when the first component is in an active state the second component is in passive state. - View Dependent Claims (20)
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Specification