EP0820044A2 - Dispositif pour désactiver un élément de sécurité pour la protection électronique d'articles - Google Patents

Dispositif pour désactiver un élément de sécurité pour la protection électronique d'articles Download PDF

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Publication number
EP0820044A2
EP0820044A2 EP97111406A EP97111406A EP0820044A2 EP 0820044 A2 EP0820044 A2 EP 0820044A2 EP 97111406 A EP97111406 A EP 97111406A EP 97111406 A EP97111406 A EP 97111406A EP 0820044 A2 EP0820044 A2 EP 0820044A2
Authority
EP
European Patent Office
Prior art keywords
permanent magnets
magnetic material
hard
deactivation
poles
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Withdrawn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
EP97111406A
Other languages
German (de)
English (en)
Other versions
EP0820044A3 (fr
Inventor
David Stocks
Peter Bremer
Terry Clancy
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 GmbH
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
Application filed by Esselte Meto International GmbH, Meto International GmbH filed Critical Esselte Meto International GmbH
Publication of EP0820044A2 publication Critical patent/EP0820044A2/fr
Publication of EP0820044A3 publication Critical patent/EP0820044A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a device for deactivation a security element for the electronic Article security, the security element 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) has, the soft magnetic material by application of an alternating magnetic field in an interrogation zone Remission of a characteristic signal is stimulated and suppressing the characteristic signal if the semi-hard or hard magnetic material Apply a correspondingly high magnetic field in the Saturation.
  • Securing elements of the type described above are - how already said - preferably in the field of electronic Article security used in department stores and warehouses.
  • a particularly advantageous embodiment of a Securing element is known from EP 0 295 028 B1 become.
  • the so-called "Thin Film "labels described These consist of a thin layer, preferably in the ⁇ m range soft magnetic material. The layer is e.g. by means of a physical deposition process under vacuum conditions applied to a carrier substrate.
  • Thin film labels show an anisotropic structure.
  • Anisotropic means that the soft magnetic layer is made of of which the "thin film” labels are formed, one Preferred axis.
  • the anisotropic structure makes itself felt In practice, this is noticeable in that the "Thin Film” label in response to a query field characteristic signal is maximum if query field and Preferred axis are aligned parallel to each other; the However, the signal disappears if the preferred axis and Query field are perpendicular to each other.
  • strip fuse elements which consist of a strip-shaped, consist of soft magnetic material. This is also here characteristic signal maximum if query field and Stripes are aligned parallel to each other, and disappears with vertical alignment. By the way, it can "Strip" fuse element also made of drawn wire consist.
  • a "thin film” security element After proper payment of the secured item on the soft magnetic "thin film” material e.g. a Perforated film made of a semi-hard magnetic material, for example nickel.
  • a Perforated film made of a semi-hard magnetic material, for example nickel.
  • strip labels are sections of a semi-hard or hard magnetic Material in the immediate vicinity of the soft magnetic Strip arranged.
  • the magnetized deactivation material creates a stray field that is the soft magnetic Material so pre-magnetized that it is in the Interrogation zone is no longer detected.
  • the deactivation material in a defined Magnetization state (remanence) is transferred, the maximum magnetization and thus maximum stray field guaranteed.
  • the invention has for its object a device propose a reliable deactivation of a Securing element for electronic article surveillance via allowed a certain distance.
  • the object is achieved in that at least two Permanent magnets are provided, the poles of which are in relation to one another parallel planes.
  • Securing element are the permanent magnets cuboid and aligned so that two side faces of equal dimensions to each other.
  • the middle magnet a smaller size than the two magnets on the outside having. This will change the direction of the magnetic field lines so influenced that any deactivation oriented security elements is achieved.
  • a cover plate To reduce the attraction of permanent magnets in the deactivation area on magnetic articles is a cover plate according to an advantageous development from a part that shields the magnetic field Material provided above the poles.
  • An alternative embodiment to the parallelepiped-shaped permanent magnets provides permanent magnets which are designed as triangular prisms, the bases of two triangular prisms each pointing towards one another.
  • the cuboid basic structure of the device for deactivation is also retained here. It has proven to be advantageous if - in the case of two permanent magnets - the pole faces of the same name lie in one plane. Good results which meet the requirements of a 'homogeneous and sufficiently strong magnetic field' can be achieved in particular if there is an air gap between the bases.
  • Fig. 1 shows a perspective view of a first Embodiment of the device according to the invention.
  • Three cuboid permanent magnets 2, 7 are in a frame arranged of a base plate 3, four side parts 4 and the intermediate parts 15 there. Poles of the same name (N; S) of the permanent magnets 2 each lie in two parallel ones Levels.
  • the side parts 4th and the receiving device formed between the intermediate parts 15 also to stray fields - i.e. the inhomogeneous portions of the Magnetic fields of the permanent magnets - shield.
  • the receiving device consists of steel, e.g. ST 2 and / or ST 37.
  • FIG. 1 12 a deactivable securing element is shown in FIG. 1 12 shown.
  • the arrows point here - as well in all subsequent drawings - the directions of movement one provided with the securing element 12 Article during the deactivation process.
  • the Fuse element 12 consists in the case shown soft magnetic strip material 13, in its immediate Close sections of a semi-hard or hard magnetic Material 14 are arranged.
  • FIG. 2 The top view of a device 1 shown in FIG. 2 for deactivating a securing element 12 for Electronic article surveillance differs from that embodiment shown in Fig. 1 only by one between the rectangular permanent magnets 2; 7 provided air gap 6.
  • the permanent magnets 2; 8 are prisms with a triangular base, the bases 10 of the permanent magnets 2, 8 to one another point.
  • 4 and 6 are the permanent magnets 2; 8 positioned in a frame-shaped receiving device. While the permanent magnets 2, 8 in the case of the in Fig. 4th adjoining example shown, they are in the 6 through an air gap 6 separated from each other.
  • Fig. 5 shows the top view of an inexpensive Embodiment of the device 1 according to the invention on the receiving device for the permanent magnets waived.
  • FIG. 7 shows an embodiment of the invention Device which is suitable for using securing elements to deactivate any orientation.
  • Three cuboid Permanent magnets 7 are side by side in one Positioning device positioned. Poles of the same name (N; S) the permanent magnets 7 are each in one plane. Of the middle one of the three permanent magnets 7 has smaller ones Pole surfaces than the two outside Permanent magnets. As a result, the homogeneity of the magnetic field with the exception of the central area repealed: securing elements 12 with any Orientation to the permanent magnets 7 become effective deactivated.

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)
EP97111406A 1996-07-17 1997-07-05 Dispositif pour désactiver un élément de sécurité pour la protection électronique d'articles Withdrawn EP0820044A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19628722 1996-07-17
DE1996128722 DE19628722A1 (de) 1996-07-17 1996-07-17 Vorrichtung zum Deaktivieren eines Sicherungselementes für die elektronische Artikelsicherung

Publications (2)

Publication Number Publication Date
EP0820044A2 true EP0820044A2 (fr) 1998-01-21
EP0820044A3 EP0820044A3 (fr) 1998-09-23

Family

ID=7800004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97111406A Withdrawn EP0820044A3 (fr) 1996-07-17 1997-07-05 Dispositif pour désactiver un élément de sécurité pour la protection électronique d'articles

Country Status (2)

Country Link
EP (1) EP0820044A3 (fr)
DE (1) DE19628722A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1088292A1 (fr) * 1998-06-19 2001-04-04 Sensormatic Electronics Corporation Desactivateur omnidirectionnel pour etiquettes magnetiques de systemes electroniques de surveillance d'articles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19737342A1 (de) * 1997-08-27 1999-03-04 Meto International Gmbh Identifizierungselement und Verfahren zur Herstellung eines Identifizierungselements

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129335A1 (fr) * 1983-05-20 1984-12-27 Minnesota Mining And Manufacturing Company Désensibilisation d'un marqueur ferromagnétique dans un système de surveillance électromagnétique pour articles
EP0226812A2 (fr) * 1985-12-21 1987-07-01 Vacuumschmelze GmbH Etiquette désactivalbe de sécurité pour système de sécurité anti-vol
DE3730077A1 (de) * 1986-09-12 1988-04-14 Marubeni Kk Vorrichtung zur magnettherapie, sowie magnete hierfuer
EP0591853A1 (fr) * 1992-10-06 1994-04-13 Minnesota Mining And Manufacturing Company Désactivateur d'étiquette magnétique pour caisses de sorties déjà existantes
EP0697683A1 (fr) * 1994-08-10 1996-02-21 Sensormatic Electronics Corporation Appareil pour activer/désactiver les étiquettes de surveillance électronique d'articles

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282804B (de) * 1961-11-25 1968-11-14 Telefunken Patent Ferromagnetisches Speicherelement
DE1197503B (de) * 1962-07-24 1965-07-29 Max Planck Gesellschaft Speicherelement mit einer duennen magnetischen Schicht und Verfahren zu seiner Herstellung und Anwendung
DE1764616A1 (de) * 1968-07-05 1971-09-09 Telefunken Patent Duenne ferromagnetische Speicherschicht
FR2114151A5 (fr) * 1970-11-18 1972-06-30 Sermag
DE2232613A1 (de) * 1972-07-03 1974-01-24 Spodig Heinrich Verfahren zur verbesserung des magnetisierungsverhaltens, insbes. aller schwer und sehr schwer magnetisierbaren permanentmagnetischen ferro-, ferri-magnetmaterialien zur erzielung hoher flussdichten b tief m (g) und feldstaerken h tief m (oe) bei gleichzeitiger sehr erheblicher einsparung an nutzbarem, teurem magnetmaterial
DE2527461C2 (de) * 1975-06-20 1987-01-02 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur Herstellung von anisotropen Segmentmagneten für elektrische Maschinen
US4689590A (en) * 1986-07-21 1987-08-25 Minnesota Mining And Manufacturing Company Demagnetization apparatus for magnetic markers used with electromagnetic article surveillance systems
US5080731A (en) * 1988-08-19 1992-01-14 Hitachi Metals, Ltd. Highly oriented permanent magnet and process for producing the same
US5350618A (en) * 1991-03-01 1994-09-27 Teijin Seiki Co., Ltd. Magnetic medium comprising a substrate having pits and grooves of specific shapes and depths
CH682859A5 (de) * 1991-10-07 1993-11-30 Maurer Magnetic Ag Permanentmagnet mit geringem Streufeld.
US5399372A (en) * 1993-11-08 1995-03-21 Southwall Technologies, Inc. Method of patterning magnetic members
US5631618A (en) * 1994-09-30 1997-05-20 Massachusetts Institute Of Technology Magnetic arrays
US5534836A (en) * 1994-11-28 1996-07-09 Sensormatic Electronics Corporation Deactivator for theft-deterrent markers
DE29515302U1 (de) * 1995-09-25 1995-11-30 Rheinmagnet Horst Baermann GmbH, 53819 Neunkirchen-Seelscheid Magnetanordnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129335A1 (fr) * 1983-05-20 1984-12-27 Minnesota Mining And Manufacturing Company Désensibilisation d'un marqueur ferromagnétique dans un système de surveillance électromagnétique pour articles
EP0226812A2 (fr) * 1985-12-21 1987-07-01 Vacuumschmelze GmbH Etiquette désactivalbe de sécurité pour système de sécurité anti-vol
DE3730077A1 (de) * 1986-09-12 1988-04-14 Marubeni Kk Vorrichtung zur magnettherapie, sowie magnete hierfuer
EP0591853A1 (fr) * 1992-10-06 1994-04-13 Minnesota Mining And Manufacturing Company Désactivateur d'étiquette magnétique pour caisses de sorties déjà existantes
EP0697683A1 (fr) * 1994-08-10 1996-02-21 Sensormatic Electronics Corporation Appareil pour activer/désactiver les étiquettes de surveillance électronique d'articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1088292A1 (fr) * 1998-06-19 2001-04-04 Sensormatic Electronics Corporation Desactivateur omnidirectionnel pour etiquettes magnetiques de systemes electroniques de surveillance d'articles
EP1088292A4 (fr) * 1998-06-19 2004-06-09 Sensormatic Electronics Corp Desactivateur omnidirectionnel pour etiquettes magnetiques de systemes electroniques de surveillance d'articles

Also Published As

Publication number Publication date
EP0820044A3 (fr) 1998-09-23
DE19628722A1 (de) 1998-01-22

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