WO2002017224A1 - Flexible magnetic foil or label including an optically diffractive structure - Google Patents

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

Info

Publication number
WO2002017224A1
WO2002017224A1 PCT/GB2001/003664 GB0103664W WO0217224A1 WO 2002017224 A1 WO2002017224 A1 WO 2002017224A1 GB 0103664 W GB0103664 W GB 0103664W WO 0217224 A1 WO0217224 A1 WO 0217224A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
magnetic
diffractive structure
flexible
place
Prior art date
Application number
PCT/GB2001/003664
Other languages
French (fr)
Inventor
Edward Philip White
Original Assignee
Thorn Secure Science Limited
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
Application filed by Thorn Secure Science Limited filed Critical Thorn Secure Science Limited
Priority to GB0303388A priority Critical patent/GB2387141A/en
Priority to AU2001278616A priority patent/AU2001278616A1/en
Priority to DE10196517T priority patent/DE10196517T1/en
Priority to JP2002521218A priority patent/JP2004506948A/en
Publication of WO2002017224A1 publication Critical patent/WO2002017224A1/en
Priority to US10/365,595 priority patent/US20030175540A1/en

Links

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.
  • Figure 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 foil 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 US 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 controUably 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 Figure 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 metallised 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 US 4,023,204, and finally a hot melt adhesive layer (5) is applied to give the finished foil.
  • the protective layer is embossed after deposition onto the substrate
  • the substrate may be embossed prior to deposition of the protective layer.
  • the reflective layer 12 in Figure 1 is optional, as are the release layer and layer 11.
  • a second embodiment of the present invention is shown in Figure 2.
  • the foil shown in Figure 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 US 4,023,204.
  • This magnetic layer is embossed with an optically diffractive structure (9), and metallised 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 Figure 3.
  • the label shown in Figure 3 is made in the following way.
  • a substrate such as a polyester film (20) is embossed with an optically diffractive structure (21), and metallised (12) as before.
  • a lacquer layer (11) is applied and allowed to dry.
  • the magnetic layer (4) is formed as described for example in US 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 optimised to improve the brightness of the diffusive structure or hologram or the throughput of the embossing process.

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 form 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. A flexible foil may include a reflective layer such as a metal layer to improve visibility of the diffractive structure.

Description

FLEXIBLE MAGNETIC FOIL OR LABEL INCLUDING AN OPTICALLY
DIFFRACTIVE STRUCTURE
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.
Embossing foils having magnetic storage media and holograms have been described in US 4,631,222 and US 4,684,795. Such foils have the disadvantage that any data stored by the magnetic storage media is not secure.
It is an object of the present invention to provide a more secure foil to be carried by, for example, a document of value.
According to a first aspect of the present invention there is provided a flexible magnetic foil or label as specified in the claims.
The invention will now be described, by way of example only, with reference to the accompanying schematic drawings, in which:- Figure 1 shows a cross-sectional view of a flexible foil according to the invention, Figure 2 shows a cross section of a second flexible foil according to the invention, and Figure 3 shows a flexible adhesive label according to the present invention
Figure 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 foil 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 US 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 controUably 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 Figure 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 metallised 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 US 4,023,204, and finally a hot melt adhesive layer (5) 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 reflective layer 12 in Figure 1 is optional, as are the release layer and layer 11. A second embodiment of the present invention is shown in Figure 2. The foil shown in Figure 2 is made in the following way. The first lacquer layer (10) is applied to the substrate (1) and allowed to dry. Then the magnetic layer (4) is formed as described for example in US 4,023,204. This magnetic layer is embossed with an optically diffractive structure (9), and metallised 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 Figure 3. The label shown in Figure 3 is made in the following way. A substrate, such as a polyester film (20) is embossed with an optically diffractive structure (21), and metallised (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 US 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 optimised to improve the brightness of the diffusive structure or hologram or the throughput of the embossing process.

Claims

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 foil 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 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.
6. A flexible label as claimed in claim 4 or 5 including a reflective layer to improve visibility of the diffractive structure.
7. A flexible label as claimed in claim 6 in which the reflective layer consists of a metal.
8. A flexible label as claimed in claim 4, 5, 6 or 7 in which the adhesive layer is a pressure sensitive adhesive layer.
9. A flexible label as claimed in claim 4 - 8 in which the adhesive layer is provided on the opposite side of the magnetic layer to that having the optically diffractive structure.
PCT/GB2001/003664 2000-08-17 2001-08-15 Flexible magnetic foil or label including an optically diffractive structure WO2002017224A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB0303388A GB2387141A (en) 2000-08-17 2001-08-15 Flexible magnetic foil or label including an optically diffractive structure
AU2001278616A AU2001278616A1 (en) 2000-08-17 2001-08-15 Flexible magnetic foil or label including an optically diffractive structure
DE10196517T DE10196517T1 (en) 2000-08-17 2001-08-15 Flexible magnetic foil or label with an optically diffractive structure
JP2002521218A JP2004506948A (en) 2000-08-17 2001-08-15 Flexible magnetic foil or label with optical diffraction structure
US10/365,595 US20030175540A1 (en) 2000-08-17 2003-02-12 Flexible magnetic foil or label including an optically diffractive structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0020121.0 2000-08-17
GBGB0020121.0A GB0020121D0 (en) 2000-08-17 2000-08-17 Flexible magnetic foil including an optically diffractive structure

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/365,595 Continuation US20030175540A1 (en) 2000-08-17 2003-02-12 Flexible magnetic foil or label including an optically diffractive structure

Publications (1)

Publication Number Publication Date
WO2002017224A1 true WO2002017224A1 (en) 2002-02-28

Family

ID=9897681

Family Applications (1)

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

Country Status (7)

Country Link
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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1932680A1 (en) * 2006-12-12 2008-06-18 HUECK Folien Ges.m.b.H. Conductive hologram films

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100206953A1 (en) * 2009-02-19 2010-08-19 O'boyle Lily Durable washable label having a visible diffraction grating pattern
EP3439438A1 (en) 2017-08-02 2019-02-06 AT & S Austria Technologie & Systemtechnik Aktiengesellschaft Non-uniform magnetic foil embedded in component carrier
DE102018004433A1 (en) * 2018-06-05 2019-12-05 Giesecke+Devrient Currency Technology Gmbh Method for producing a value document, value document and printing device

Citations (3)

* 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
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

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
CH588358A5 (en) * 1975-08-14 1977-05-31 Landis & Gyr Ag
DK1125762T3 (en) * 1989-01-31 2004-05-10 Dainippon Printing Co Ltd Map
GB8924111D0 (en) * 1989-10-26 1989-12-13 Amblehurst Ltd Optical device
DE4410431A1 (en) * 1994-03-25 1995-09-28 Giesecke & Devrient Gmbh ID card protected against unauthorized reproduction with a copier

Patent Citations (3)

* 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1932680A1 (en) * 2006-12-12 2008-06-18 HUECK Folien Ges.m.b.H. Conductive hologram films

Also Published As

Publication number Publication date
US20030175540A1 (en) 2003-09-18
CN1452764A (en) 2003-10-29
GB0020121D0 (en) 2000-10-04
JP2004506948A (en) 2004-03-04
DE10196517T1 (en) 2003-08-07
GB2387141A (en) 2003-10-08
AU2001278616A1 (en) 2002-03-04
GB0303388D0 (en) 2003-03-19

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