NO903875L - MAGNETIC MATERIALS FOR SECURITY APPLICATIONS. - Google Patents

MAGNETIC MATERIALS FOR SECURITY APPLICATIONS.

Info

Publication number
NO903875L
NO903875L NO90903875A NO903875A NO903875L NO 903875 L NO903875 L NO 903875L NO 90903875 A NO90903875 A NO 90903875A NO 903875 A NO903875 A NO 903875A NO 903875 L NO903875 L NO 903875L
Authority
NO
Norway
Prior art keywords
active
magnetic
deactivating
magnetic materials
security applications
Prior art date
Application number
NO90903875A
Other languages
Norwegian (no)
Other versions
NO903875D0 (en
Inventor
Davies Dafydd Geraint
Original Assignee
Scient Generics Ltd
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=NO903875(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Scient Generics Ltd filed Critical Scient Generics Ltd
Publication of NO903875D0 publication Critical patent/NO903875D0/en
Publication of NO903875L publication Critical patent/NO903875L/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR 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 OR 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 OR 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 OR 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)
  • Burglar Alarm Systems (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Treatment Devices (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Road Signs Or Road Markings (AREA)
  • Guiding Agricultural Machines (AREA)

Abstract

A tag or marker is disclosed which comprises a substrate; an 'active' magnetic material which is a soft magnetic material having a high magnetic permeability and a low coercive force; and a deactivating material which is a hard or semi-hard magnetic material having a moderate or high coercive force and a moderate magnetic permeability, whereby the deactivating material, when subjected to a sufficiently high magnetising force, is able to clamp the magnetic properties of the 'active' material so as to deactivate the 'active' material. The tag or marker is characterised in that at least one of said 'active' material and said deactivating material is formed by an electrodeposition process. In another aspect, the deactivating material is formed from a steel containing 0.15 % carbon, 16-18 % chromium, and 6-8 % nickel, the balance being iron.
NO90903875A 1989-01-09 1990-09-05 MAGNETIC MATERIALS FOR SECURITY APPLICATIONS. NO903875L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898900398A GB8900398D0 (en) 1989-01-09 1989-01-09 Magnetic materials
PCT/GB1990/000024 WO1990007784A1 (en) 1989-01-09 1990-01-09 Magnetic materials for security applications

Publications (2)

Publication Number Publication Date
NO903875D0 NO903875D0 (en) 1990-09-05
NO903875L true NO903875L (en) 1990-09-05

Family

ID=10649786

Family Applications (1)

Application Number Title Priority Date Filing Date
NO90903875A NO903875L (en) 1989-01-09 1990-09-05 MAGNETIC MATERIALS FOR SECURITY APPLICATIONS.

Country Status (11)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0774740T3 (en) * 1989-10-31 2003-06-10 Checkpoint Systems Inc Label for use with an electronic product monitoring system
US5580664A (en) * 1992-12-23 1996-12-03 Minnesota Mining And Manufacturing Company Dual status thin-film eas marker having multiple magnetic layers
AU669014B2 (en) * 1992-12-23 1996-05-23 Minnesota Mining And Manufacturing Company Dual status thin-film EAS marker
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 (en) 1998-07-30 2000-02-03 Meto International Gmbh Tape material, securing element and method for producing a securing element for electronic article surveillance
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 (en) * 1981-05-01 1982-12-01 Philips Nv MAGNETIC TRANSFER ELEMENT AND MAGNETIC PERMEABLE PART FOR A MAGNETIC TRANSFER ELEMENT.
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
EP0295028B1 (en) * 1987-06-08 1993-04-14 Esselte Meto International GmbH Magnetic devices
GB8713353D0 (en) * 1987-06-08 1987-07-15 Scient Generics Ltd Magnetic article surveillance systems

Also Published As

Publication number Publication date
EP0412137B1 (en) 1994-05-11
BR9004571A (en) 1991-07-30
NO903875D0 (en) 1990-09-05
JP2582942B2 (en) 1997-02-19
JPH03504183A (en) 1991-09-12
ATE105649T1 (en) 1994-05-15
CA2024608A1 (en) 1990-07-10
WO1990007784A1 (en) 1990-07-12
GB8900398D0 (en) 1989-03-08
AU620198B2 (en) 1992-02-13
EP0412137A1 (en) 1991-02-13
DK0412137T3 (en) 1994-06-06
DE69008789T2 (en) 1994-11-24
DE69008789D1 (en) 1994-06-16
AU4824890A (en) 1990-08-01
CA2024608C (en) 1997-08-19

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