EP0951000A3 - Device for deactivating a security element for the electronic protection of articles - Google Patents

Device for deactivating a security element for the electronic protection of articles Download PDF

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Publication number
EP0951000A3
EP0951000A3 EP98123424A EP98123424A EP0951000A3 EP 0951000 A3 EP0951000 A3 EP 0951000A3 EP 98123424 A EP98123424 A EP 98123424A EP 98123424 A EP98123424 A EP 98123424A EP 0951000 A3 EP0951000 A3 EP 0951000A3
Authority
EP
European Patent Office
Prior art keywords
magnetic field
magnet
magnetic material
hard
securing element
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Withdrawn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
EP98123424A
Other languages
German (de)
French (fr)
Other versions
EP0951000A2 (en
Inventor
Manfred Dr. Rührig
Michael Rapp
Peter Bremer
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
Meto International 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
Priority claimed from DE19831415A external-priority patent/DE19831415A1/en
Application filed by Meto International GmbH filed Critical Meto International GmbH
Publication of EP0951000A2 publication Critical patent/EP0951000A2/en
Publication of EP0951000A3 publication Critical patent/EP0951000A3/en
Withdrawn legal-status Critical Current

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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

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  • 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)

Abstract

Die Erfindung betrifft eine Vorrichtung zum Deaktivieren eines Sicherungselementes (9) für die elektronische Artikelsicherung, wobei das Sicherungselement (9) ein magnetisches Material mit hoher Permeabilität und geringer Koerzitivkraft (weichmagnetisches Material) und ein magnetisches Material mit geringer Permeabilität und hoher Koerzitivkraft (halbhart- oder hartmagnetisches Material) aufweist, wobei das weichmagnetische Material durch Anlegen eines magnetischen Wechselfeldes in einer Abfragezone zur Remission eines charakteristischen Signals angeregt wird und wobei das charakteristische Signal unterdrückt wird, wenn sich das halbhart- oder hartmagnetische Material nach Anlegen eines entsprechend hohen Magnetfeldes in einem remanenten Magnetisierungszinstand befindet.The invention relates to a device for deactivating a securing element (9) for electronic article surveillance, the securing element (9) a magnetic material with high permeability and low Coercive force (soft magnetic material) and a magnetic material with low permeability and high coercive force (semi-hard or hard magnetic Material), wherein the soft magnetic material through Application of an alternating magnetic field in an interrogation zone Remission of a characteristic signal is stimulated and where that characteristic signal is suppressed when the semi-hard or hard magnetic material after applying a correspondingly high magnetic field is in a remanent magnetization interest.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung (1) vorzuschlagen, die eine verläßliche Deaktivierung eines Sicherungselements (9) zur elektronischen Artikelsicherung über eine größere Entfernung erlaubt.The invention is based on the object of proposing a device (1), which a reliable deactivation of a security element (9) electronic article surveillance allowed over a greater distance.

Die Aufgabe wird dadurch gelöst, daß zumindest ein Magnet (2; 7) vorgesehen ist, daß zumindest eine Umlenkvorrichtung (4) für die Magnetfeldlinien des Magneten zwischen dem zu deaktivierenden Sicherungelement (9) und dem Magneten (2; 7) vorgesehen ist und daß in der Umlenkvorrichtung (3; 4) für die Magnetfeldlinien des Magneten (2; 7) eine im wesentlichen linienförmige Öffnung (5) vorgesehen ist, durch die die Magnetfeldlinien des Magnetfeldes des Magneten (2; 7) gebündelt austreten.

Figure 00000001
The object is achieved in that at least one magnet (2; 7) is provided, that at least one deflection device (4) is provided for the magnetic field lines of the magnet between the securing element (9) to be deactivated and the magnet (2; 7) and that An essentially linear opening (5) is provided in the deflection device (3; 4) for the magnetic field lines of the magnet (2; 7), through which the magnetic field lines of the magnetic field of the magnet (2; 7) emerge in bundles.
Figure 00000001
EP98123424A 1998-04-17 1998-12-09 Device for deactivating a security element for the electronic protection of articles Withdrawn EP0951000A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19816958 1998-04-17
DE19816958 1998-04-17
DE19831415 1998-07-14
DE19831415A DE19831415A1 (en) 1998-04-17 1998-07-14 Device for deactivating a securing element for electronic article surveillance

Publications (2)

Publication Number Publication Date
EP0951000A2 EP0951000A2 (en) 1999-10-20
EP0951000A3 true EP0951000A3 (en) 2000-06-21

Family

ID=26045538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98123424A Withdrawn EP0951000A3 (en) 1998-04-17 1998-12-09 Device for deactivating a security element for the electronic protection of articles

Country Status (1)

Country Link
EP (1) EP0951000A3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129335A1 (en) * 1983-05-20 1984-12-27 Minnesota Mining And Manufacturing Company Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
EP0431745A2 (en) * 1989-12-08 1991-06-12 Minnesota Mining And Manufacturing Company Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
EP0585891A1 (en) * 1992-09-03 1994-03-09 Minnesota Mining And Manufacturing Company Desensitizing apparatus for electromagnetic article surveillance system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129335A1 (en) * 1983-05-20 1984-12-27 Minnesota Mining And Manufacturing Company Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
EP0431745A2 (en) * 1989-12-08 1991-06-12 Minnesota Mining And Manufacturing Company Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
EP0585891A1 (en) * 1992-09-03 1994-03-09 Minnesota Mining And Manufacturing Company Desensitizing apparatus for electromagnetic article surveillance system

Also Published As

Publication number Publication date
EP0951000A2 (en) 1999-10-20

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