AU669014B2 - Dual status thin-film EAS marker - Google Patents

Dual status thin-film EAS marker Download PDF

Info

Publication number
AU669014B2
AU669014B2 AU51807/93A AU5180793A AU669014B2 AU 669014 B2 AU669014 B2 AU 669014B2 AU 51807/93 A AU51807/93 A AU 51807/93A AU 5180793 A AU5180793 A AU 5180793A AU 669014 B2 AU669014 B2 AU 669014B2
Authority
AU
Australia
Prior art keywords
signal
thin
marker
films
magnetic
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.)
Ceased
Application number
AU51807/93A
Other languages
English (en)
Other versions
AU5180793A (en
Inventor
Ching-Long Tsai
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of AU5180793A publication Critical patent/AU5180793A/en
Application granted granted Critical
Publication of AU669014B2 publication Critical patent/AU669014B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G08B13/2428—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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Thin Magnetic Films (AREA)
AU51807/93A 1992-12-23 1993-11-19 Dual status thin-film EAS marker Ceased AU669014B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US99618292A 1992-12-23 1992-12-23
US996182 2001-11-28

Publications (2)

Publication Number Publication Date
AU5180793A AU5180793A (en) 1994-07-07
AU669014B2 true AU669014B2 (en) 1996-05-23

Family

ID=25542596

Family Applications (1)

Application Number Title Priority Date Filing Date
AU51807/93A Ceased AU669014B2 (en) 1992-12-23 1993-11-19 Dual status thin-film EAS marker

Country Status (6)

Country Link
EP (1) EP0604293B1 (de)
JP (1) JPH06231376A (de)
AU (1) AU669014B2 (de)
CA (1) CA2109643C (de)
DE (1) DE69328819T2 (de)
ES (1) ES2148211T3 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09180936A (ja) * 1995-12-27 1997-07-11 Unitika Ltd 磁気素子
CA2194045A1 (en) * 1995-12-27 1997-06-28 Shuji Ueno Magnetic marker
US5699047A (en) * 1996-01-19 1997-12-16 Minnesota Mining And Manufacturing Co. Electronic article surveillance markers for direct application to optically recorded media
JPH09232142A (ja) * 1996-02-28 1997-09-05 Unitika Ltd 磁気素子及びその製造方法
JP2002334307A (ja) * 2001-05-08 2002-11-22 Nhk Spring Co Ltd 合成樹脂成形体

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015993A (en) * 1989-06-29 1991-05-14 Pitney Bowes Inc. Ferromagnetic alloys with high nickel content and high permeability
US5083112A (en) * 1990-06-01 1992-01-21 Minnesota Mining And Manufacturing Company Multi-layer thin-film eas marker
US5368948A (en) * 1989-01-09 1994-11-29 Esselte Meto International Produktions Magnetic materials for security applications

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3880202T2 (de) * 1987-06-08 1993-08-05 Esselte Meto Int Gmbh Magnetische vorrichtungen.
GB8900398D0 (en) * 1989-01-09 1989-03-08 Scient Generics Ltd Magnetic materials

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5368948A (en) * 1989-01-09 1994-11-29 Esselte Meto International Produktions Magnetic materials for security applications
US5015993A (en) * 1989-06-29 1991-05-14 Pitney Bowes Inc. Ferromagnetic alloys with high nickel content and high permeability
US5083112A (en) * 1990-06-01 1992-01-21 Minnesota Mining And Manufacturing Company Multi-layer thin-film eas marker

Also Published As

Publication number Publication date
DE69328819D1 (de) 2000-07-13
EP0604293B1 (de) 2000-06-07
CA2109643C (en) 2002-03-26
JPH06231376A (ja) 1994-08-19
AU5180793A (en) 1994-07-07
DE69328819T2 (de) 2000-12-28
CA2109643A1 (en) 1994-06-24
EP0604293A1 (de) 1994-06-29
ES2148211T3 (es) 2000-10-16

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