CA2024608C - Magnetic materials for security applications - Google Patents

Magnetic materials for security applications

Info

Publication number
CA2024608C
CA2024608C CA002024608A CA2024608A CA2024608C CA 2024608 C CA2024608 C CA 2024608C CA 002024608 A CA002024608 A CA 002024608A CA 2024608 A CA2024608 A CA 2024608A CA 2024608 C CA2024608 C CA 2024608C
Authority
CA
Canada
Prior art keywords
marker
deactivating
magnetic
tag
active
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.)
Expired - Fee Related
Application number
CA002024608A
Other languages
English (en)
French (fr)
Other versions
CA2024608A1 (en
Inventor
Dafydd Geraint Davies
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meto International GmbH
Original Assignee
Esselte Meto International Produktions GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10649786&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2024608(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Esselte Meto International Produktions GmbH filed Critical Esselte Meto International Produktions GmbH
Publication of CA2024608A1 publication Critical patent/CA2024608A1/en
Application granted granted Critical
Publication of CA2024608C publication Critical patent/CA2024608C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • G08B13/2411—Tag deactivation
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
    • G08B13/2417—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags having a radio frequency identification chip
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • H01F41/24—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates from liquids
    • H01F41/26—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates from liquids using electric currents, e.g. electroplating

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Soft Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Hard Magnetic Materials (AREA)
  • Thin Magnetic Films (AREA)
  • Valve Device For Special Equipments (AREA)
  • Road Signs Or Road Markings (AREA)
  • Guiding Agricultural Machines (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Burglar Alarm Systems (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Magnetic Treatment Devices (AREA)
CA002024608A 1989-01-09 1990-01-09 Magnetic materials for security applications Expired - Fee Related CA2024608C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898900398A GB8900398D0 (en) 1989-01-09 1989-01-09 Magnetic materials
GB8900398.2 1989-01-09

Publications (2)

Publication Number Publication Date
CA2024608A1 CA2024608A1 (en) 1990-07-10
CA2024608C true CA2024608C (en) 1997-08-19

Family

ID=10649786

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002024608A Expired - Fee Related CA2024608C (en) 1989-01-09 1990-01-09 Magnetic materials for security applications

Country Status (11)

Country Link
EP (1) EP0412137B1 (de)
JP (1) JP2582942B2 (de)
AT (1) ATE105649T1 (de)
AU (1) AU620198B2 (de)
BR (1) BR9004571A (de)
CA (1) CA2024608C (de)
DE (1) DE69008789T2 (de)
DK (1) DK0412137T3 (de)
GB (1) GB8900398D0 (de)
NO (1) NO903875L (de)
WO (1) WO1990007784A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2064191C (en) * 1989-10-31 1996-12-24 Peter L. Gill Method for tagging articles used in conjunction with an electronic article surveillance system, and tags or labels useful in connection therewith
AU669014B2 (en) * 1992-12-23 1996-05-23 Minnesota Mining And Manufacturing Company Dual status thin-film EAS marker
US5580664A (en) * 1992-12-23 1996-12-03 Minnesota Mining And Manufacturing Company Dual status thin-film eas marker having multiple magnetic layers
US5401584A (en) * 1993-09-10 1995-03-28 Knogo Corporation Surveillance marker and method of making same
US5405702A (en) * 1993-12-30 1995-04-11 Minnesota Mining And Manufacturing Company Method for manufacturing a thin-film EAS and marker
US5847650A (en) * 1996-10-04 1998-12-08 Knogo North America Inc. Theft resistant circuit assembly
DE19834367A1 (de) 1998-07-30 2000-02-03 Meto International Gmbh Bandmaterial, Sicherungselement und Verfahren zur Herstellung eines Sicherungselements für die elektronische Artikelsicherung
GB2394725A (en) * 2002-10-04 2004-05-05 Qinetiq Ltd Method of forming a magnetic information tag by electroless deposition

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484184A (en) * 1979-04-23 1984-11-20 Allied Corporation Amorphous antipilferage marker
NL8102148A (nl) * 1981-05-01 1982-12-01 Philips Nv Magnetisch overdrachtselement alsmede magnetisch permeabel onderdeel voor een magnetisch overdrachtselement.
US4661216A (en) * 1986-04-21 1987-04-28 International Business Machines Corporation Electrodepositing CoNiFe alloys for thin film heads
US4808279A (en) * 1986-10-02 1989-02-28 The University Of Toronto Innovations Foundation Process for preparing magnetic recording material
DE3880202T2 (de) * 1987-06-08 1993-08-05 Esselte Meto Int Gmbh Magnetische vorrichtungen.
GB8713353D0 (en) * 1987-06-08 1987-07-15 Scient Generics Ltd Magnetic article surveillance systems

Also Published As

Publication number Publication date
JPH03504183A (ja) 1991-09-12
ATE105649T1 (de) 1994-05-15
AU4824890A (en) 1990-08-01
GB8900398D0 (en) 1989-03-08
AU620198B2 (en) 1992-02-13
NO903875D0 (no) 1990-09-05
DE69008789T2 (de) 1994-11-24
WO1990007784A1 (en) 1990-07-12
DK0412137T3 (da) 1994-06-06
EP0412137A1 (de) 1991-02-13
BR9004571A (pt) 1991-07-30
EP0412137B1 (de) 1994-05-11
NO903875L (no) 1990-09-05
JP2582942B2 (ja) 1997-02-19
DE69008789D1 (de) 1994-06-16
CA2024608A1 (en) 1990-07-10

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Legal Events

Date Code Title Description
EEER Examination request
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