US4943093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security paper for bank notes and the like
Assignee: Portals Ltd
•
Filing: 1988-11-14
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Granted: 1990-07-24
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Expires: 2008-11-14
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 5 mm 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 continuous 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 tranverse 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 J. Melling
- 👤 Malcolm R. M. Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:55
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: 29
Claim 1
Independent Claim
155 words
Security paper comprising opposed surfaces for the provision of printing to identify a document formed from the security paper, a security device positioned between the two surfaces of the security paper as a public security feature such that at least a portion of the said security device is totally imbedded within the security paper, said security device being of not more than 5 mm width, and comprising a flexible, water-impermeable substrate with a layer of metal on at least one side of the substrate, there being present on one side of the device a continuous metal path along its length, wherein said device has metal-free portions which transmit light of between 10% and 50% of the area of the device, said metal-free portions along the length of the device providing a repeating means of identification 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
155 words
Security paper comprising opposed surfaces for the provision of printing to identify a document formed from the security paper, a security device positioned between the two surfaces of the security paper as a public security feature such that at least a portion of the said security device is totally imbedded within the security paper, said security device being of not more than 5 mm width, and comprising a flexible, water-impermeable substrate with a layer of metal on at least one side of the substrate, there being present on one side of the device a continuous metal path along its length, wherein said device has metal-free portions which transmit light of between 10% and 50% of the area of the device, said metal-free portions along the length of the device providing a repeating means of identification 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
23 words
The security paper of claim 1 wherein the security device is a strip or thread having a width of 1 to 3 mm.
Claim 4
Dependent Claim
16 words
The security paper of claim 1 wherein the metal free portion provides letters of an alphabet.
Claim 5
Dependent Claim
25 words
The security paper of claim 1 wherein the area of the metal-free portions is from 10% to 45% of the area of the security device.
Claim 6
Dependent Claim
18 words
The security paper of claim 4 wherein the area of the metal-free portions is from 15% to 40%.
Claim 7
Dependent Claim
20 words
The security paper of claim 1 which further comprises a watermark and said security device is positioned within the watermark.
Claim 8
Dependent Claim
28 words
The security paper of claim 1 wherein the security device is exposed at a plurality of locations on at least one of the opposing surfaces of said paper.
Claim 9
Dependent Claim
24 words
The security paper of claim 7 wherein the security device is exposed at a plurality of locations on each opposing surface of said paper.
Claim 10
Dependent Claim
20 words
The security paper of claim 8 wherein the exposed locations on the opposing surfaces are in registry with each other.
Claim 11
Dependent Claim
21 words
The security paper of claim 8 wherein the exposed locations on the opposing surfaces are in partial registry with each other.
Claim 12
Dependent Claim
20 words
The security paper of claim 1, wherein a dye is present on at least one side of the security device.
Claim 13
Dependent Claim
26 words
The security paper of claim 11, wherein the dye is present on both sides of the security device, said dye being the same on both sides.
Claim 14
Dependent Claim
31 words
The security paper of claim 11 wherein the dye is present on both sides of the security device; said dye being different on one side to that on the other side.
Claim 15
Dependent Claim
30 words
The security paper of claim 1, wherein the security device comprises a plastics substrate with the metal on one side thereof, and a dye is present in the plastics substrate.
Claim 16
Dependent Claim
21 words
The security paper of claim 1 wherein a fluorescent material is present on at least one side of the security device.
Claim 17
Dependent Claim
28 words
The security paper of claim 15 wherein the fluorescent material is present on both sides of the security device; said fluorescent material being the same on both sides.
Claim 18
Dependent Claim
34 words
The security paper of claim 15 wherein the fluorescent material is present on both sides of the security device and said fluorescent material being different on one side to that on the other side.
Claim 19
Dependent Claim
35 words
The security paper of claim 1, wherein the security device comprises a plastics substrate with the metal on one side thereof, and a dye is present in a coating on the surface of the metal.
Claim 20
Dependent Claim
32 words
The security paper of claim 1 wherein the security device comprises a plastic substrate with the metal on one side of said substrate and a dye on the surface of the substrate.
Claim 21
Dependent Claim
30 words
The security paper of claim 19 wherein the dye is on one side of the plastic substrate and the metal coating is on the other side of the plastic substrate.
Claim 22
Dependent Claim
30 words
The security device of claim 1 wherein the security device comprises a plastic substrate with the metal on one side thereof and fluorescent material is present in the plastic substrate.
Claim 23
Dependent Claim
34 words
The security paper of claim 1 wherein the security device comprises a plastic substrate with the metal on one side of the substrate and a fluorescent material present on the surface of said substrate.
Claim 24
Dependent Claim
29 words
The security paper of claim 22 wherein the fluorescent material is on one side of the substrate and the metal coating is on the other side of the substrate.
Claim 25
Dependent Claim
38 words
The security paper of claim 1 wherein the security device comprises a plastic substrate with the metal on one side of the substrate and a fluorescent material is present in a coating on the surface of the metal.
Claim 26
Dependent Claim
35 words
The security paper of claim 1, wherein the security device comprises a plastics substrate with the metal on one side thereof and a dichroic layer is present on at least one side of the device.
Claim 27
Dependent Claim
26 words
The security paper of claim 1 wherein the paper is made from fibers selected from the group consisting of synthetic fibers, natural fibers and mixtures thereof.
Claim 28
Dependent Claim
22 words
The security paper of claim 1 wherein the paper comprises two laminated sheets with the security device positioned between the two sheets.
Claim 29
Dependent Claim
19 words
A security document which comprises the security paper of claim 18 with printing on a surface of said paper.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |