Patent EP0252579A1 successfully refreshed from Google Patents.
EP0252579A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Security document and method of testing same
Assignee: Moore Business Forms Inc
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Filing: 1987-04-15
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Granted: —
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Expires: 2007-04-15
Abstract
Abstract A security document (10) having first and second areas (14, 18) on one side coated or treated with complementary compositions of the types that will leave a mark (36, 38, 40, 42) when pressed together, with some areas (20, 22, 24) of one composition desensitized, so that the authenticity of the document (10) may be tested by folding the document (10) to place the areas (14, 18) together and then exerting pressure thereon.
Inventors
- 👤 Richard David Caprio
- 👤 Roland Lee Engle
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:31
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44; D21H21/46; B; B41; B41M; B41M3/00; B41M3/14; B41M3/142; B42; B42D; B42D25/00; B42D25/20; B42D25/29; Y; Y10; Y10S; Y10S428/00; Y10S428/916; Y10S462/00; Y10S462/903
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
59 words
A sheet of material having on one of its sides a first area comprising a first composition and a second area comprising a second composition, the compositions being of types such that when regions of the first and second areas are pressed together a visible mark will appear in the pressed region of at least one of the areas.
Claim 2
Dependent Claim
59 words
A sheet of material having on one of its sides a first area comprising a first composition and a second area comprising a second composition, the compositions being of types such that when regions of the first and second areas are pressed together a visible mark will appear in the pressed region of at least one of the areas.
Claim 3
Dependent Claim
40 words
A sheet as in claim 1 in which a portion of at least one of the areas is desensitized so that no visible mark will appear as a result of the application of pressure in said portion of said area.
Claim 4
Dependent Claim
69 words
A method of detecting whether a document is a valid original or an unauthorized copy using a sheet of material as described in claim 1 including the steps of folding the sheet to place the areas where the first and second compositions would be in contact with one another in a valid original and exerting a force on the thusly plied areas to determine if a visible mark results.
Claim 5
Dependent Claim
74 words
A method of detecting whether a document is a valid original or an unauthorized copy using a sheet of material as described in claim 2 including the steps of folding the sheet to place areas where the first and second compositions would be in contact with one another in a valid original and exerting a force on the thusly plied areas to determine if a visible mark results in other than the desensitized portion.
References Cited (Backward Citations)
GB666438A
Cited
GB1520919A
Cited
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