EP0628408A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Security paper with color mark
Assignee: Domtar Inc
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Filing: 1993-10-29
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Granted: —
•
Expires: 2013-10-29
Abstract
Abstract A security paper is provided for incorporation in a security document, or other document having intrinsic value. The security paper includes a resinous substrate sheet (14) on which indicia (18) are printed. Paper sheets (12,16) are laminated on either side of the resinous substrate sheet using a suitable adhesive (28,30). In the laminated security paper, the indicia printed on the substrate sheet are undetectable when viewed in reflected light, but become apparent when viewed transmitted light within the visible spectrum. The security paper may be incorporated in a security document in which a set of indicia (20,22) printed on at least one of the outer faces of the paper sheets, such that the indicia on the substrate and the indicia on the document form a total image when viewed in transmitted light. A method for manufacturing the security paper is also provided.
Inventors
- 👤 Dragisa Andric
- 👤 Borislav Stojanovic
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:41
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B23/00; B32B23/04; B32B23/06; B32B27/32; B32B27/36; B32B3/00; B32B3/26; B32B3/266; B32B38/00; B32B38/14; B32B38/145; B32B7/00; B32B7/04; B32B7/12; B41; B41M; B41M3/00; B41M3/14; B42; B42D; B42D25/00; B42D25/20; B42D25/29; B42D25/30; B42D25/346; B42D25/351; B42D25/36; B42D25/369; B42D25/373; B42D25/378; B42D25/387; D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44; D21H27/00; D21H27/30; D21H27/32; D21H27/34; D21H27/36; G; G07; G07D; G07D7/00; G07D7/06; G07D7/12; G07D7/1205; B32B2307/00; B32B2307/40; B32B2307/402; B32B2307/4023; B32B2307/41; B32B2307/412; B32B2554/00; B42D2033/16; B42D2033/20; B42D2033/28; B42D2033/30; B42D2035/24; B42D2035/36; B42D2035/50; B42D25/40; B42D25/45; B42D25/465; B42D25/47; Y; Y10; Y10S; Y10S283/00; Y10S283/902; Y10S428/00; Y10S428/916
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
94 words
A security paper comprising: a resinous substrate sheet having two faces; indicia disposed on one of said faces of said resinous substrate sheet; and, a first and a second paper sheet, said first paper sheet being permanently laminated on one of said faces of said resinous substrate sheet, and said second paper sheet being permanently laminated on the other of said faces of said resinous substrate sheet, whereby said indicia are substantially undetectable when viewed in reflected light and are apparent through said paper sheets when viewed in transmitted light within the visible spectrum.
Claim 2
Dependent Claim
30 words
The security paper as set forth in claim 1, wherein said paper sheets are permanently laminated on each of said faces of said substrate sheet by means of an adhesive.
Claim 3
Dependent Claim
35 words
The security paper as set forth in claim 1, wherein said indicia include at least one color region, the color of said region corresponding to a wavelength of light of from 380 to 720 nanometers.
Claim 4
Dependent Claim
52 words
The security paper as set forth in claim 1, wherein said indicia include a first layer of non-transparent ink, a layer of color indicia including at least one color region disposed on said first layer of non-transparent ink, and a second layer of non-transparent ink disposed over said layer of color indicia.
Claim 5
Dependent Claim
21 words
The security paper as set forth in claim 1, wherein at least a portion of said resinous substrate sheet is metallized.
Claim 6
Dependent Claim
21 words
The security paper as set forth in claim 1, wherein at least a portion of said resinous substrate sheet is perforated.
Claim 7
Dependent Claim
14 words
The security paper as set forth in claim 1, wherein said indicia include microtext.
Claim 8
Dependent Claim
19 words
The security paper as set forth in claim 1, wherein said indicia are printed on said resinous substrate sheet.
Claim 9
Dependent Claim
38 words
The security paper as set forth in claim 8, wherein said indicia are printed on said resinous substrate sheet in ink selected from the group of inks consisting of transparent ink, fluorescent ink, phosphorescent ink and magnetic ink.
Claim 10
Dependent Claim
48 words
The security paper as set forth in claim 8, wherein at least a portion of said indicia is printed on said resinous substrate sheet in ultraviolet ink, said portion of said indicia being substantially undetectable under light within the visible spectrum and visible when viewed under ultraviolet light.
Claim 11
Dependent Claim
23 words
The security paper as set forth in claim 8, wherein at least a portion of said indicia is printed in black and white.
Claim 12
Dependent Claim
21 words
The security paper as set forth in claim 8, wherein at least a portion of said indicia is printed in color.
Claim 13
Dependent Claim
28 words
The security paper as set forth in claim 1, wherein said resinous substrate sheet comprises a resinous material selected from the group consisting of polyester, polypropylene and cellophane.
Claim 14
Dependent Claim
31 words
The security paper as set forth in claim 1, wherein said resinous substrate sheet has a basis weight included in a range from 11.0 to 22.5 grams per square meter inclusive.
Claim 15
Dependent Claim
57 words
The security paper as set forth in claim 1, wherein each of said paper sheets has a basis weight included in a range from 19 to 50 grams per square meter inclusive, a thickness included in a range from 0.038 to 0.050 millimeters inclusive, and an opacity included in a range from 75 to 85 percent inclusive.
Claim 16
Dependent Claim
33 words
The security paper as set forth in claim 1, wherein each of said paper sheets comprise fibrous material selected from the group consisting of wood fibers, cotton fibers, flax fibers, and hemp fibers.
Claim 17
Dependent Claim
141 words
A laminated security paper comprising: a resinous substrate layer having a first face and a second face; a layer of color indicia disposed on said first face of said substrate layer, said color indicia including at least one region having a color corresponding to a wavelength of light of from 380 to 720 nanometers; a first layer of adhesive disposed on said first face of said substrate layer, over said layer of color indicia; a second layer of adhesive disposed on said second face of said substrate layer; a first layer of paper disposed over said first adhesive layer and fixed permanently to said substrate layer and said layer of color indicia by said first adhesive layer; and, a second layer of paper disposed over said second adhesive layer and fixed permanently to said substrate layer by said second adhesive layer.
Claim 18
Dependent Claim
45 words
The laminated security paper as set forth in claim 17, wherein said layer of color indicia includes a first layer of non-transparent ink, color indicia disposed over said first layer of non-transparent ink, and a second layer of non-transparent ink disposed over said color indicia.
Claim 19
Dependent Claim
81 words
The laminated security paper as set forth in claim 17, wherein said resinous substrate layer has a basis weight included in a range from 11.0 to 22.5 grams per square meter inclusive, and wherein each of said paper layers has a basis weight included in a range from 19 to 50 grams per square meter inclusive, a thickness included in a range from 0.038 to 0.050 millimeters inclusive, and an opacity included in a range from 75 to 85 percent inclusive.
Claim 20
Dependent Claim
42 words
The laminated security paper as set forth in claim 17, wherein said layer of color indicia is printed on said resinous substrate layer in ink selected from the group of inks consisting of transparent ink, fluorescent ink, phosphorescent ink and magnetic ink.
Claim 21
Dependent Claim
134 words
A security document comprising: a resinous substrate sheet having two faces; indicia disposed on one of said faces of said resinous substrate sheet; a first and a second paper sheet, each of said paper sheets having an inner face and an outer face, one of said paper sheets being permanently laminated on a respective face of said resinous substrate sheet by means of an adhesive applied between said respective face of said substrate sheet and said inner face of each of said paper sheets; and a set of indicia printed on at least one of said outer faces of said paper sheets, whereby said indicia on said substrate sheet cooperate with said set of indicia printed on said outer face of said paper sheet to form a total image when viewed in transmitted light.
Claim 22
Dependent Claim
34 words
The security document as set forth in claim 21, wherein at least a portion of said indicia printed on said outer face of said paper sheet become substantially invisible when viewed in transmitted light.
Claim 23
Dependent Claim
32 words
The security document as set forth in claim 21, wherein said set of indicia on said outer face of said paper sheet is in register with said indicia on said substrate sheet.
Claim 24
Dependent Claim
52 words
The security document as set forth in claim 21, wherein said indicia disposed on said resinous substrate sheet include a first layer of non-transparent ink, a layer of color indicia disposed over said first layer of non-transparent ink, and a second layer of non-transparent ink disposed over said layer of color indicia.
Claim 25
Independent Claim
48 words
A method for manufacturing a security paper comprising the steps of: defining a graphic design in color; printing said graphic design on a resinous substrate sheet as a substantially transparent color image; and, laminating said printed substrate sheet between two paper sheets by means of an suitable adhesive.
Claim 26
Dependent Claim
23 words
The method as set forth in claim 25, comprising the further step of metallizing said resinous substrate sheet prior to said laminating step.
Claim 27
Dependent Claim
23 words
The method as set forth in claim 25, comprising the further step of perforating said resinous substrate sheet prior to said laminating step.
Claim 28
Dependent Claim
26 words
The method as set forth in claim 25, comprising the further step of printing a microtext on said resinous substrate sheet prior to said laminating step.
Claim 29
Dependent Claim
40 words
The method as set forth in claim 25, wherein said graphic design is printed on said substrate sheet in ink selected from the group of inks consisting of transparent ink, fluorescent ink, phosphorescent ink, non-transparent white ink, and magnetic ink.
Claim 30
Dependent Claim
24 words
The method as set forth in claim 25, wherein said graphic design is printed on said resinous substrate sheet by a rotogravure printing process.
Claim 31
Dependent Claim
52 words
The method as set forth in claim 25, wherein said printing step includes printing a first layer of non-transparent ink on said resinous substrate sheet, printing a layer of color indicia over said first layer of non-transparent ink, and printing a second layer of non-transparent ink over said layer of color indicia.
References Cited (Backward Citations)
GB1353244A
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EP0319157A2
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JPH02167771A
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EP0388090A1
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