Tamper resistant validation marks
First Claim
1. A tamper and counterfeit resistant document comprising:
- a substrate comprising a top and bottom surface;
a tamper-resistant validation mark, said tamper-resistant validation mark comprising an area for the application of toner or ink, said tamper-resistant validation mark comprising a slit pattern;
said slit pattern comprising a first plurality of slits having a first axis and a second plurality of slits having a second axis, wherein said first axis and said second axis intersect; and
said substrate having reduced tensile strength between adjacent slits in a direction perpendicular to said first axis and in a direction perpendicular to said second axis, whereby the tamper and counterfeit resistant capability of said document is enhanced.
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Accused Products
Abstract
The present invention includes a pattern of fine slits formed in the material of document where sensitive information is intended to be printed or imprinted, wherein the slit pattern modifies the tensile strength of the substrate. In addition, the slit pattern modifies the toner or ink permeability of a substrate to facilitate the penetration of the toner or ink printed or imprinted on the surface of document into the substrate. Further, the design of the slit pattern can be coordinated with a latent image pattern to comprise optical properties such that the physical response of a typical duplicating or photocopy device to the validation mark will allow a copy to be easily discerned from an original.
70 Citations
11 Claims
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1. A tamper and counterfeit resistant document comprising:
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a substrate comprising a top and bottom surface; a tamper-resistant validation mark, said tamper-resistant validation mark comprising an area for the application of toner or ink, said tamper-resistant validation mark comprising a slit pattern; said slit pattern comprising a first plurality of slits having a first axis and a second plurality of slits having a second axis, wherein said first axis and said second axis intersect; and said substrate having reduced tensile strength between adjacent slits in a direction perpendicular to said first axis and in a direction perpendicular to said second axis, whereby the tamper and counterfeit resistant capability of said document is enhanced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification