Document having security image and composite sheet and method for forming
First Claim
1. A document comprising:
- (a) a substrate having printing on a first surface;
(b) a composite structure adhered to said substrate first surface, said composite structure including,(i) a lacquer coating having a thickness in the range of 0.5 microns to 3 microns, and(ii) an adhesive coating having a thickness in the range of 0.75 microns to 4 microns securing said lacquer coating to said substrate first surface; and
(c) a holographic image or diffraction grating image embossed in said lacquer coating, said holographic image or diffraction grating image being embossed after said composite structure is adhered to said substrate, said printing being visible through said holographic image or diffraction grating image.
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Accused Products
Abstract
A foil/composite sheet which either (1) is suitable for use in directly forming a holographic image or diffraction grating image on a document substrate or (2) has a holographic image or diffraction grating image embossed in the composite sheet such that a party producing the final document may hot stamp a chip containing the holographic image directly on a substrate forming the major portion of the final document. The composite sheet is characterized in that it has a sufficient degree of transparency to permit a person viewing the holographic image or diffraction grating image of such composite sheet or chip therefrom affixed to a printed substrate to readily see the printing through the holographic image or diffraction grating image.
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Citations
22 Claims
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1. A document comprising:
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(a) a substrate having printing on a first surface; (b) a composite structure adhered to said substrate first surface, said composite structure including, (i) a lacquer coating having a thickness in the range of 0.5 microns to 3 microns, and (ii) an adhesive coating having a thickness in the range of 0.75 microns to 4 microns securing said lacquer coating to said substrate first surface; and (c) a holographic image or diffraction grating image embossed in said lacquer coating, said holographic image or diffraction grating image being embossed after said composite structure is adhered to said substrate, said printing being visible through said holographic image or diffraction grating image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A document comprising:
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(a) an opaque substrate having printing on a first surface; (b) a composite sheet adhered to said first surface, said composite sheet including (i) a coating of adhesive having a thickness in the range of 0.75 microns to 4 microns adjacent said first surface, (ii) an embossment receiving coating having a thickness in the range of 0.025 micron to 1 micron affixed to said coating of adhesive, said embossment receiving coating being an esterified montan wax, (iii) a coating of soft lacquer having a thickness in the range of 0.5 microns to 5 microns affixed to said embossment receiving coating, said soft lacquer having a glass transition temperature no higher than 70°
C., and(iv) a coating of hard lacquer having a thickness in the range of 0.5 microns to 5 microns affixed to said coating of soft lacquer, said hard lacquer having a glass transition temperature of at least 80°
C.; and(c) said embossment receiving coating and said soft lacquer coating having embossed therein a holographic image or diffraction grating image, said printing being visible through said holographic image or diffraction grating image. - View Dependent Claims (8, 9, 10, 11)
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12. A document comprising:
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(a) a thermoplastic substrate having printing on a first surface; (b) a composite sheet adhered to said first surface, said composite sheet including (i) a coating of adhesive having a thickness in the range of 0.75 microns to 4 microns adjacent said first surface, (ii) an embossment receiving coating having a thickness in the range of 0.025 micron to 1 micron affixed to said coating of adhesive, said embossment receiving coating being an esterified montan wax, (iii) a layer of metal having a thickness resulting in an optical density in the range of 0.10 to 0.50 units as measured by Macbeth Densitometer affixed to said embossment receiving coating, (iv) a coating of soft lacquer having a thickness in the range of 0.5 microns to 5 microns affixed to said layer of metal, said soft lacquer having a glass transition temperature no higher than 70°
C., and(v) a coating of hard lacquer having a thickness in the range of 0.5 microns to 5 microns affixed to said coating of soft lacquer, said hard lacquer having a glass transition temperature of at least 80°
C.; and(c) said embossment receiving coating, said layer of metal and said soft lacquer coating having embossed therein a holographic image or diffraction grating image, said printing being visible through said holographic image or diffraction grating image. - View Dependent Claims (13, 14, 15, 16)
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17. A composite sheet comprising:
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(a) a thermoplastic substrate; (b) a release coating having a thickness of 0.025 microns to 5 microns affixed to said thermoplastic substrate; (c) a coating of hard lacquer having a thickness in the range of 0.5 microns to 5 microns affixed to said release coating, said hard lacquer having a glass transition temperature of at least 80°
C.;(d) a coating of soft lacquer having a thickness in the range of 0.5 microns to 5 microns affixed to said hard lacquer coating, said soft lacquer having a glass transition temperature no higher than 70°
C.; and(e) an embossment receiving coating having a thickness in the range of 0.025 micron to 1 micron affixed to said coating of soft lacquer, said embossment receiving coating being an esterified montan wax, said embossment receiving coating and said soft lacquer coating having embossed therein a holographic image or diffraction grating image, said thermoplastic substrate being releasable from the remainder of said composite sheet, said remainder being transparent. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification