Security Device and Novel Anti-Counterfeit Product Employing Same
AssigneeCrane Co.
InventorsTimothy T. Crane, Raj Sardararam Prehar
Life of this patent
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Abstract
Paper-based security devices having printed marks or indicia on one surface that are visible from that surface and from an opposing surface of the security device, are provided. The present invention further provides a method of making such paper-based security devices as well as security documents having at least one such security device embedded therein and/or mounted thereon.
Claims21
A security device suitable for use on or within a security document such as a security paper, which comprises a paper substrate having wet tensile strength and opposing planar surfaces, wherein the substrate has marks printed on only one surface, the marks being visible from the printed surface and from the opposing surface of the substrate.
A security device suitable for use on or within a security document such as a security paper, which comprises a paper substrate having wet tensile strength and opposing planar surfaces, wherein the substrate has marks printed on only one surface, the marks being visible from the printed surface and from the opposing surface of the substrate under ultraviolet and/or infrared light.
A method of making security devices, which comprises:
- providing a tissue paper substrate having opposing planar surfaces, wherein the tissue paper substrate has a thickness ranging from about 15 to about 40 microns, a density ranging from about 0.3 to about 1.0 gram per cubic centimeter, and a basis weight ranging from about 5 to about 30 grams per square meter;
- optionally, coating a surface of the tissue paper substrate with a clear or pigment-free varnish;
- printing marks on only one surface of the tissue paper substrate using ultraviolet invisible fluorescent inks and/or infrared invisible fluorescent inks;
- and
- cutting the printed tissue paper substrate into any desired shape or form.
Dependencies are inferred from the claim text.