EP0431745A3 - Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems - Google Patents

Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems Download PDF

Info

Publication number
EP0431745A3
EP0431745A3 EP19900311821 EP90311821A EP0431745A3 EP 0431745 A3 EP0431745 A3 EP 0431745A3 EP 19900311821 EP19900311821 EP 19900311821 EP 90311821 A EP90311821 A EP 90311821A EP 0431745 A3 EP0431745 A3 EP 0431745A3
Authority
EP
European Patent Office
Prior art keywords
sensitizer
article surveillance
markers used
surveillance systems
electromagnetic article
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.)
Withdrawn
Application number
EP19900311821
Other versions
EP0431745A2 (en
Inventor
Samuel C/O Minnesota Mining And Montean
Heinrich C/O Minnesota Mining And Schug
Juergen C/O Minnesota Mining And Sanetra
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 EP0431745A2 publication Critical patent/EP0431745A2/en
Publication of EP0431745A3 publication Critical patent/EP0431745A3/en
Withdrawn legal-status Critical Current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

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)
  • Geophysics And Detection Of Objects (AREA)
EP19900311821 1989-12-08 1990-10-29 Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems Withdrawn EP0431745A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US44768489A 1989-12-08 1989-12-08
US447684 1989-12-08

Publications (2)

Publication Number Publication Date
EP0431745A2 EP0431745A2 (en) 1991-06-12
EP0431745A3 true EP0431745A3 (en) 1991-11-21

Family

ID=23777326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900311821 Withdrawn EP0431745A3 (en) 1989-12-08 1990-10-29 Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems

Country Status (3)

Country Link
EP (1) EP0431745A3 (en)
JP (1) JPH03189794A (en)
CA (1) CA2029245A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9200589D0 (en) * 1992-01-13 1992-03-11 Patel Ramesh C Security apparatus
FR2720538B1 (en) * 1994-05-25 1996-08-02 Jacques Lewiner Device for deactivating magnetic anti-theft elements.
US5493275A (en) * 1994-08-09 1996-02-20 Sensormatic Electronics Corporation Apparatus for deactivation of electronic article surveillance tags
US5534836A (en) * 1994-11-28 1996-07-09 Sensormatic Electronics Corporation Deactivator for theft-deterrent markers
US5625339A (en) * 1996-01-08 1997-04-29 Minnesota Mining And Manufacturing Company Apparatus for changing the status of magnetic markers in an electronic article surveillance system
EP0951000A3 (en) * 1998-04-17 2000-06-21 Meto International GmbH Device for deactivating a security element for the electronic protection of articles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665449A (en) * 1969-07-11 1972-05-23 Minnesota Mining & Mfg Method and apparatus for detecting at a distance the status and identity of objects
DE3014667A1 (en) * 1980-04-16 1981-10-29 Werner A. 4300 Essen Reiter Deactivator circuit for security strip on saleable goods - has deactivating coil pulsed from thyristor controlled capacitor discharge
EP0129335A1 (en) * 1983-05-20 1984-12-27 Minnesota Mining And Manufacturing Company Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
EP0202033A1 (en) * 1985-05-13 1986-11-20 Magnetic Peripherals Inc. A degaussing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665449A (en) * 1969-07-11 1972-05-23 Minnesota Mining & Mfg Method and apparatus for detecting at a distance the status and identity of objects
DE3014667A1 (en) * 1980-04-16 1981-10-29 Werner A. 4300 Essen Reiter Deactivator circuit for security strip on saleable goods - has deactivating coil pulsed from thyristor controlled capacitor discharge
EP0129335A1 (en) * 1983-05-20 1984-12-27 Minnesota Mining And Manufacturing Company Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
EP0202033A1 (en) * 1985-05-13 1986-11-20 Magnetic Peripherals Inc. A degaussing apparatus

Also Published As

Publication number Publication date
CA2029245A1 (en) 1991-06-09
EP0431745A2 (en) 1991-06-12
JPH03189794A (en) 1991-08-19

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Effective date: 19950623