US20030175540A1 - Flexible magnetic foil or label including an optically diffractive structure - Google Patents

Flexible magnetic foil or label including an optically diffractive structure Download PDF

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Publication number
US20030175540A1
US20030175540A1 US10/365,595 US36559503A US2003175540A1 US 20030175540 A1 US20030175540 A1 US 20030175540A1 US 36559503 A US36559503 A US 36559503A US 2003175540 A1 US2003175540 A1 US 2003175540A1
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United States
Prior art keywords
layer
magnetic
diffractive structure
flexible
place
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US10/365,595
Inventor
Edward White
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QED IP SERVICES Ltd
Thorn Secure Science Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Assigned to QED I.P. SERVICES LIMITED reassignment QED I.P. SERVICES LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WHITE, EDWARD PHILIP
Publication of US20030175540A1 publication Critical patent/US20030175540A1/en
Assigned to THORN SECURE SCIENCE LIMITED reassignment THORN SECURE SCIENCE LIMITED RE-RECORD TO CORRECT THE NAME OF THE ASSIGNEE, PREVIOUSLY RECORDED ON REEL 014068 FRAME 0658, ASSIGNOR CONFIRMS THE ASSIGNMENT OF THE ENTIRE INTEREST. Assignors: WHITE, EDWARD PHILIP
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/086—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06187—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking
    • G06K19/06196—Constructional details
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/12—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by magnetic means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
    • G09F7/02—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols
    • G09F7/04—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols the elements being secured or adapted to be secured by magnetic means

Definitions

  • the present invention relates to a flexible magnetic foil or label including an optically diffractive structure. It relates particularly, though not exclusively, to embossing foils for attaching security elements to objects such as for example tickets, share certificates, bank notes or credit cards.
  • FIG. 1 shows a cross-sectional view of a flexible foil according to the invention
  • FIG. 2 shows a cross section of a second flexible foil according to the inventions
  • FIG. 3 shows a flexible adhesive label according to the present invention.
  • FIG. 1 shows a cross-sectional view of a flexible foil for attachment to an object such as a document by stamping; blocking, or roll application, according to the present invention. It consists of or includes a carrier layer ( 1 ) typically made of polyester 15 microns thick, a release layer ( 2 ), a protective layer ( 3 ), in the present embodiment consisting of lacquer layers 10 and 11 , a magnetic layer ( 4 ) consisting of magnetic material having a permanently structured magnetic characteristic which varies from place, and an adhesive layer ( 5 ).
  • the flexible fail has an optically diffractive structure formed in the protective layer by embossing.
  • the magnetic layer 4 in the present embodiment can be manufactured by the method described in U.S. Pat. No. 4,023,204, for example, which is hereby incorporated herein by reference.
  • a flexible substrate such as a polyester film is coated with a liquid slurry having anisotropic magnetic particles (such as for example acicular ferric oxide particles) which have a generally random orientation.
  • the coated substrate is moved past a first permanent magnet, which makes an oblique angle with the direction of motion of the substrate. This causes the particles to become aligned.
  • the coated substrate continues to move past a further magnet, which is an electromagnet, and thus can generate a controllably variable magnetic field. This magnet is arranged to make an oblique angle with the direction of the first magnet.
  • the particles By switching the strength of the magnetic field being generated by the further magnet, the particles become aligned in a different direction.
  • the slurry is then solidified to fix the particles in place.
  • the magnetic properties of the coating are constant across the width of the substrate, but change in the direction of motion of the substrate.
  • the substrate is subsequently slit along its length (i.e. direction of arrow) to provide thin lengths of magnetic tape.
  • the foil shown in FIG. 1 is made in the following way.
  • the release layer ( 2 ) is coated onto the carrier layer ( 1 ), then the first lacquer layer ( 10 ) is applied and allowed to dry.
  • This layer is then embossed with an optically diffractive structure ( 9 ), which is then metallized to provide a reflective layer ( 12 ) to improve its visibility after attachment to an object.
  • a second lacquer layer 11 is applied and allowed to dry, then the magnetic layer ( 4 ) is formed as described for example in U.S. Pat. No. 4,023,204, and finally a hot melt adhesive layer ( 3 ) is applied to give the finished foil.
  • the protective layer is embossed after deposition onto the substrate, as an alternative, the substrate may be embossed prior to deposition of the protective layer.
  • the reflective layer 12 in FIG. 1 is optional, as are the release layer and layer 11 .
  • FIG. 2 A second embodiment of the present invention is shown in FIG. 2.
  • the foil shown in FIG. 2 is made in the following way.
  • the first lacquer layer ( 10 ) is applied to the substrate ( 1 ) and allowed to dry.
  • the magnetic layer ( 4 ) is formed as described for example in U.S. Pat. No. 4,023,204.
  • This magnetic layer is embossed with an optically diffractive structure ( 9 ), and metallized as before.
  • a second lacquer layer 11 is applied and, allowed to dry, and finally the whole assembly, including the substrate, is attached to an object by lamination.
  • FIG. 3 A third embodiment of the present invention, is shown in FIG. 3.
  • the label shown in FIG. 3 is made in the following way.
  • a substrate such as a polyester film ( 20 ) is embossed with an optically diffractive structure ( 21 ), and metallized ( 12 ) as before.
  • a lacquer layer ( 11 ) is applied and allowed to dry.
  • the magnetic layer ( 4 ) is formed as described for example in U.S. Pat. No. 4,023,204.
  • a pressure sensitive adhesive layer ( 23 ) is applied, and a release treated carrier layer 1 added on the opposite side of the label to that of the optically refractive structure.
  • the polyester layer 1 is not a carrier layer, but an integral part of the label.
  • an optional lacquer layer can be applied immediately before the embossing stage.
  • This lacquer layer can be optimized to improve the brightness of the diffusive structure or, hologram or the throughput of the embossing process.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Holo Graphy (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

A flexible foil or label for attachment to an object such as a document by stamping, blocking, pressure or roll application, consisting of or including a carrier layer, an optional release layer, a protective layer, a magnetic layer consisting of magnetic material having a permanently structured magnetic characteristic which varies from place to place, and an optional adhesive layer, the flexible foil having an optically diffractive structure formed in either the carrier layer, the protective layer, or the magnetic; layer. The flexible foil may include a reflective layer such as a metal layer to improve visibility of the diffractive structure.

Description

    RELATED APPLICATION
  • The application is a continuation of earlier filed International Application No. PCT/GB01/03664 filed Aug. 15, 2001, the contents of which are here incorporated by reference in their entirety. [0001]
    • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0002]
  • The present invention relates to a flexible magnetic foil or label including an optically diffractive structure. It relates particularly, though not exclusively, to embossing foils for attaching security elements to objects such as for example tickets, share certificates, bank notes or credit cards. [0003]
  • 2. Prior Art [0004]
  • Embossing foils having magnetic storage media and holograms have been described in U.S. Pat. Nos. 4,631,222 and 4,684,795. Such foils have the disadvantage that any data stored by the magnetic storage media is not secure. [0005]
    • SUMMARY OF THE INVENTION
  • It is an object of the present invention to provide a more secure foil to be carried by, for example, a document of value. [0006]
  • According is a first aspect of the present invention there is provided a flexible magnetic foil or label as specified in the claims.[0007]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention will row be described, by way of example only, with reference to the accompanying schematic drawings, in which: [0008]
  • FIG. 1 shows a cross-sectional view of a flexible foil according to the invention, [0009]
  • FIG. 2 shows a cross section of a second flexible foil according to the inventions, and [0010]
  • FIG. 3 shows a flexible adhesive label according to the present invention.[0011]
    • DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
  • FIG. 1 shows a cross-sectional view of a flexible foil for attachment to an object such as a document by stamping; blocking, or roll application, according to the present invention. It consists of or includes a carrier layer ([0012] 1) typically made of polyester 15 microns thick, a release layer (2), a protective layer (3), in the present embodiment consisting of lacquer layers 10 and 11, a magnetic layer (4) consisting of magnetic material having a permanently structured magnetic characteristic which varies from place, and an adhesive layer (5). The flexible fail has an optically diffractive structure formed in the protective layer by embossing.
  • The [0013] magnetic layer 4 in the present embodiment can be manufactured by the method described in U.S. Pat. No. 4,023,204, for example, which is hereby incorporated herein by reference. In this method, a flexible substrate such as a polyester film is coated with a liquid slurry having anisotropic magnetic particles (such as for example acicular ferric oxide particles) which have a generally random orientation. The coated substrate is moved past a first permanent magnet, which makes an oblique angle with the direction of motion of the substrate. This causes the particles to become aligned. The coated substrate continues to move past a further magnet, which is an electromagnet, and thus can generate a controllably variable magnetic field. This magnet is arranged to make an oblique angle with the direction of the first magnet. By switching the strength of the magnetic field being generated by the further magnet, the particles become aligned in a different direction. The slurry is then solidified to fix the particles in place. With this arrangement it will be noted that the magnetic properties of the coating are constant across the width of the substrate, but change in the direction of motion of the substrate. The substrate is subsequently slit along its length (i.e. direction of arrow) to provide thin lengths of magnetic tape.
  • The foil shown in FIG. 1 is made in the following way. The release layer ([0014] 2) is coated onto the carrier layer (1), then the first lacquer layer (10) is applied and allowed to dry. This layer is then embossed with an optically diffractive structure (9), which is then metallized to provide a reflective layer (12) to improve its visibility after attachment to an object. A second lacquer layer 11 is applied and allowed to dry, then the magnetic layer (4) is formed as described for example in U.S. Pat. No. 4,023,204, and finally a hot melt adhesive layer (3) is applied to give the finished foil.
  • Although in the embodiment described above the protective layer is embossed after deposition onto the substrate, as an alternative, the substrate may be embossed prior to deposition of the protective layer. The [0015] reflective layer 12 in FIG. 1 is optional, as are the release layer and layer 11.
  • A second embodiment of the present invention is shown in FIG. 2. The foil shown in FIG. 2 is made in the following way. The first lacquer layer ([0016] 10) is applied to the substrate (1) and allowed to dry. Then the magnetic layer (4) is formed as described for example in U.S. Pat. No. 4,023,204. This magnetic layer is embossed with an optically diffractive structure (9), and metallized as before. A second lacquer layer 11 is applied and, allowed to dry, and finally the whole assembly, including the substrate, is attached to an object by lamination.
  • A third embodiment of the present invention, is shown in FIG. 3. The label shown in FIG. 3 is made in the following way. A substrate, such as a polyester film ([0017] 20) is embossed with an optically diffractive structure (21), and metallized (12) as before. A lacquer layer (11) is applied and allowed to dry. Then the magnetic layer (4) is formed as described for example in U.S. Pat. No. 4,023,204. Finally, a pressure sensitive adhesive layer (23) is applied, and a release treated carrier layer 1 added on the opposite side of the label to that of the optically refractive structure. Note in this embodiment the polyester layer 1 is not a carrier layer, but an integral part of the label.
  • In both the second and third embodiments, an optional lacquer layer can be applied immediately before the embossing stage. This lacquer layer can be optimized to improve the brightness of the diffusive structure or, hologram or the throughput of the embossing process. [0018]

Claims (10)

What is claimed is:
1. A flexible foil for attachment to an object such as a document by stamping, blocking, or roll application, consisting of or including a carrier layer, an optional release layer, a protective layer, a magnetic layer consisting of magnetic material having a permanently structured magnetic characteristic which varies from place to place, and an optional adhesive layer, the flexible foil having an optically diffractive structure formed in the carrier layer and/or the protective layer, and/or the magnetic layer.
2. A flexible foil as claimed in claim 1 including a reflective layer to improve visibility of the diffractive structure.
3. A flexible foal as claimed in claim 2 in which the reflective layer consists of a metal.
4. A flexible label for attachment to an object such as a document by pressure, or roll application, consisting of or including a substrate layer, a magnetic layer consisting of magnetic material having a permanently structured magnetic characteristic which varies from place to place, and an adhesive layer, the flexible label having an optically diffractive structure formed in the substrate layer.
5. A flexible label as claimed in claim 4 including a reflective layer to improve visibility of the diffractive structure.
6. A flexible label for attachment to an object such as a document by pressure, or roll application, consisting of or including a substrate layer, a magnetic layer consisting of magnetic material having a permanently structured magnetic characteristic which varies from place to place, and an adhesive layer, the flexible label having an optically diffractive structure formed in the magnetic layer.
7. A flexible label as claimed in claim 6 including a reflective layer to improve visibility of the diffractive structure.
8. A flexible label as claimed in claim 7 in which the reflective layer consists of a metal.
9. A, flexible label as claimed in claim 4 in which the adhesive layer is a pressure sensitive adhesive layer.
10. A flexible label as claimed in claim 4 in which the adhesive layer is provided on the opposite side of the magnetic layer to that having the optically diffractive structure.
US10/365,595 2000-08-17 2003-02-12 Flexible magnetic foil or label including an optically diffractive structure Abandoned US20030175540A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0020121.0A GB0020121D0 (en) 2000-08-17 2000-08-17 Flexible magnetic foil including an optically diffractive structure
GBGB0020121.0 2000-08-17
PCT/GB2001/003664 WO2002017224A1 (en) 2000-08-17 2001-08-15 Flexible magnetic foil or label including an optically diffractive structure

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/003664 Continuation WO2002017224A1 (en) 2000-08-17 2001-08-15 Flexible magnetic foil or label including an optically diffractive structure

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US20030175540A1 true US20030175540A1 (en) 2003-09-18

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US10/365,595 Abandoned US20030175540A1 (en) 2000-08-17 2003-02-12 Flexible magnetic foil or label including an optically diffractive structure

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US (1) US20030175540A1 (en)
JP (1) JP2004506948A (en)
CN (1) CN1452764A (en)
AU (1) AU2001278616A1 (en)
DE (1) DE10196517T1 (en)
GB (2) GB0020121D0 (en)
WO (1) WO2002017224A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190045624A1 (en) * 2017-08-02 2019-02-07 At&S Austria Technologie & Systemtechnik Aktiengesellschaft Non-Uniform Magnetic Foil Embedded in Component Carrier
US11602949B2 (en) * 2018-06-05 2023-03-14 Giesecke+Devrient Currency Technology Gmbh Method for manufacturing a value document, value document and printing device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1932680B1 (en) * 2006-12-12 2012-06-13 HUECK Folien Ges.m.b.H. Conductive hologram films
US20100206953A1 (en) * 2009-02-19 2010-08-19 O'boyle Lily Durable washable label having a visible diffraction grating pattern

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023204A (en) * 1974-10-16 1977-05-10 Emi Limited Magnetic recording
US4119361A (en) * 1975-08-14 1978-10-10 Landis & Gyr Multilayer identification card
US4631222A (en) * 1984-06-20 1986-12-23 Messrs. Leonhard Kurz Gmbh & Co. Embossing foils
US4684795A (en) * 1985-01-07 1987-08-04 United States Banknote Company L.P. Security tape with integrated hologram and magnetic strip
US5310222A (en) * 1989-10-26 1994-05-10 De La Rue Holographics Limited Optical device
US5387013A (en) * 1989-01-31 1995-02-07 Dai Nippon Insatsu Kabushiki Kaisha Heat transfer recording media
US6082778A (en) * 1994-03-25 2000-07-04 Giesecke & Devrient Gmbh Identity card protected from unauthorized reproduction with a copying machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023204A (en) * 1974-10-16 1977-05-10 Emi Limited Magnetic recording
US4119361A (en) * 1975-08-14 1978-10-10 Landis & Gyr Multilayer identification card
US4631222A (en) * 1984-06-20 1986-12-23 Messrs. Leonhard Kurz Gmbh & Co. Embossing foils
US4684795A (en) * 1985-01-07 1987-08-04 United States Banknote Company L.P. Security tape with integrated hologram and magnetic strip
US5387013A (en) * 1989-01-31 1995-02-07 Dai Nippon Insatsu Kabushiki Kaisha Heat transfer recording media
US5310222A (en) * 1989-10-26 1994-05-10 De La Rue Holographics Limited Optical device
US6082778A (en) * 1994-03-25 2000-07-04 Giesecke & Devrient Gmbh Identity card protected from unauthorized reproduction with a copying machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190045624A1 (en) * 2017-08-02 2019-02-07 At&S Austria Technologie & Systemtechnik Aktiengesellschaft Non-Uniform Magnetic Foil Embedded in Component Carrier
US10993313B2 (en) * 2017-08-02 2021-04-27 At&S Austria Technologie & Systemtechnik Aktiengesellschaft Non-uniform magnetic foil embedded in component carrier
US11602949B2 (en) * 2018-06-05 2023-03-14 Giesecke+Devrient Currency Technology Gmbh Method for manufacturing a value document, value document and printing device

Also Published As

Publication number Publication date
GB0020121D0 (en) 2000-10-04
AU2001278616A1 (en) 2002-03-04
JP2004506948A (en) 2004-03-04
GB2387141A (en) 2003-10-08
GB0303388D0 (en) 2003-03-19
WO2002017224A1 (en) 2002-02-28
CN1452764A (en) 2003-10-29
DE10196517T1 (en) 2003-08-07

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AS Assignment

Owner name: QED I.P. SERVICES LIMITED, GREAT BRITAIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WHITE, EDWARD PHILIP;REEL/FRAME:014068/0658

Effective date: 20030501

AS Assignment

Owner name: THORN SECURE SCIENCE LIMITED, GREAT BRITAIN

Free format text: RE-RECORD TO CORRECT THE NAME OF THE ASSIGNEE, PREVIOUSLY RECORDED ON REEL 014068 FRAME 0658, ASSIGNOR CONFIRMS THE ASSIGNMENT OF THE ENTIRE INTEREST.;ASSIGNOR:WHITE, EDWARD PHILIP;REEL/FRAME:014098/0459

Effective date: 20030501

STCB Information on status: application discontinuation

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