Patent US4899894A successfully refreshed from Google Patents.
Patent EP0319157A2 successfully refreshed from Google Patents.
EP0319157A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Security paper for bank notes and the like
Assignee: Portals Ltd
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Filing: 1988-11-15
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Granted: —
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Expires: 2008-11-15
Abstract
Abstract Security papers according to the invention comprise opposed surfaces for the provision of printing to identify a document formed from the paper, and positioned at least partially between the two surfaces of the paper as a public security feature a security device of not more than 5mm width, which device comprises a flexible, water-impermeable substrate with a layer of metal on one or both sides of the substrate, there being present on one side of the device a continous metal path along its length, wherein said device has metal-free portions of between 10% and 50% of the area of the device, said metal-free portions along the length of the device providing a repeating pattern, design, indicia or the like with at least some of the metal-free portions across the transverse direction of the device being wholly surrounded by metal. The metal-free portions may provide characters of a language, such as letters of the English alphabet. The security device may be a strip or thread and this may be positioned in a window, or in an aperture where two windows are impartial or complete register.
Inventors
- 👤 Raymond Joseph Melling
- 👤 Malcolm Robert Murray Knight
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:26
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/42; D21F; D21F11/00; D21H27/00; D21H27/30; D21H27/32; D21H27/34; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
135 words
Security paper comprising opposed surfaces for the provision of printing to identify a document formed from the paper, and positioned at least partially between the two surfaces of the paper as a public security feature a security device of not more than 5mm width, which device comprises a flexible, water-impermeable substrate with a layer of metal on one or both sides of the substrate, there being present on one side of the device a continous metal path along its length, wherein said device has metal-free portions of between 10% and 50% of the area of the device, said metal-free portions along the length of the device providing a repeating pattern, design, indicia or the like with at least some of the metal-free portions across the transverse direction of the device being wholly surrounded by metal.
Claim 2
Dependent Claim
135 words
Security paper comprising opposed surfaces for the provision of printing to identify a document formed from the paper, and positioned at least partially between the two surfaces of the paper as a public security feature a security device of not more than 5mm width, which device comprises a flexible, water-impermeable substrate with a layer of metal on one or both sides of the substrate, there being present on one side of the device a continous metal path along its length, wherein said device has metal-free portions of between 10% and 50% of the area of the device, said metal-free portions along the length of the device providing a repeating pattern, design, indicia or the like with at least some of the metal-free portions across the transverse direction of the device being wholly surrounded by metal.
Claim 3
Dependent Claim
22 words
Paper as claimed in claim 1 wherein the security device is a strip or thread having a width of 1 to 3mm.
Claim 4
Dependent Claim
26 words
Paper as claimed in claim 1 or claim 2, wherein the metal free portion provides characters of a language, such as letters of the English alphabet.
Claim 5
Dependent Claim
30 words
Paper as claimed in any one of the preceding claims, wherein the area of the metal-free portions is from 10% to 45% of the area of a strip or thread.
Claim 6
Dependent Claim
58 words
Paper as claimed in any one of claims 1 to 4, wherein portions of a strip or thread are positioned in windows where there is no or virtually no paper fibres on the strip or thread, or a portion of the strip or thread is positioned in an aperture with two such windows in partial or complete register.
Claim 7
Dependent Claim
52 words
Paper as claimed in any one of the preceding claims, wherein there is present on either or both sides of a security device a dye or a fluorescent material, which may be the same or different when the dye or fluorescent material is present on both sides of the strip or thread.
Claim 8
Dependent Claim
50 words
Paper as claimed in claim 6, wherein the strip or thread comprises a plastics substrate with the metal on one side thereof, and a dye or fluorescent material present in the plastics substrate or on the surface of said substrate, or in a coating on the surface of the metal.
Claim 9
Dependent Claim
40 words
A paper as claimed in any one of claims 1 to 5 wherein the security device comprises a plastics substrate with the metal on one side thereof and a dichroic layer present on at least one side of the device.
Claim 10
Dependent Claim
46 words
A paper as claimed in any one of the preceding claims wherein the paper is made from synthetic fibres, or from synthetic and natural fibres, or is made by laminating at least two sheets of synthetic material, the security device being positioned between the two sheets.
Claim 11
Dependent Claim
54 words
A process for making a security paper as claimed in claim 1, wherein a preformed security device is incorporated into paper during a continuous papermaking process to produce paper from which a plurality of substantially identical pieces of paper can be obtained which, when printed, form substantially identical security documents, such as bank notes.
Claim 12
Dependent Claim
42 words
A process as claimed in claim 10, wherein there is used a cylinder mould papermaking machine substantially as described in EP 0 059 056 to produce paper having windows in each of which there is present a portion of the security device.
Claim 13
Dependent Claim
28 words
A process as claimed in claim 10 wherein the security device is positioned continuously between two webs of paper which are laminated together to produce the security paper.
Claim 14
Dependent Claim
21 words
A bank note or other security document when produced from paper as claimed in any one of claims 1 to 9.
References Cited (Backward Citations)
No citation records indexed.
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