DK0454021T3 - Method of deactivating a resonance label and circuitry for carrying out the method - Google Patents

Method of deactivating a resonance label and circuitry for carrying out the method

Info

Publication number
DK0454021T3
DK0454021T3 DK91106427.7T DK91106427T DK0454021T3 DK 0454021 T3 DK0454021 T3 DK 0454021T3 DK 91106427 T DK91106427 T DK 91106427T DK 0454021 T3 DK0454021 T3 DK 0454021T3
Authority
DK
Denmark
Prior art keywords
deactivating
circuitry
carrying
resonance label
deactivated
Prior art date
Application number
DK91106427.7T
Other languages
Danish (da)
Inventor
J Rehder
Original Assignee
Actron Entwicklungs Ag
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 Actron Entwicklungs Ag filed Critical Actron Entwicklungs Ag
Application granted granted Critical
Publication of DK0454021T3 publication Critical patent/DK0454021T3/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
    • G08B13/2414—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
    • G08B13/242—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)
  • Radar Systems Or Details Thereof (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Near-Field Transmission Systems (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Discharge Heating (AREA)

Abstract

In order to deactivate a resonant tag, a pulse generator circuit (1-4) is provided which is designed to transmit a pulse group comprising a specific number of pulses. In addition or as an alternative, an attenuator (R1), which can be deactivated via a switching device (S1), is provided in the transmission antenna circuit to facilitate the subsequent identification of any post-oscillating, i.e. not yet deactivated tags. <IMAGE>
DK91106427.7T 1990-04-25 1991-04-22 Method of deactivating a resonance label and circuitry for carrying out the method DK0454021T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH139690 1990-04-25

Publications (1)

Publication Number Publication Date
DK0454021T3 true DK0454021T3 (en) 1997-06-16

Family

ID=4209450

Family Applications (1)

Application Number Title Priority Date Filing Date
DK91106427.7T DK0454021T3 (en) 1990-04-25 1991-04-22 Method of deactivating a resonance label and circuitry for carrying out the method

Country Status (6)

Country Link
EP (1) EP0454021B1 (en)
JP (1) JP2910873B2 (en)
AT (1) ATE147527T1 (en)
DE (1) DE59108459D1 (en)
DK (1) DK0454021T3 (en)
ES (1) ES2095267T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK167829B1 (en) * 1991-11-14 1993-12-20 Poul Richter Joergensen PROCEDURE AND APPARATUS FOR ACTIVATING AND DISABLING LABELS
NL1002150C2 (en) * 1996-01-23 1997-07-25 Nedap Nv Deactivation system with improved reliability.
DE69914619T2 (en) * 1998-10-30 2004-12-16 Sensormatic Electronics Corp., Boca Raton SECURITY SYSTEMS FOR PREVENTING THEFT OF THE GOODS IN DEPARTMENT STORES
US6486782B1 (en) 2000-07-07 2002-11-26 3M Innovative Properties Device for changing the status of dual status magnetic electronic article surveillance markers
US6778087B2 (en) 2001-06-15 2004-08-17 3M Innovative Properties Company Dual axis magnetic field EAS device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1599120A (en) * 1978-05-19 1981-09-30 Philips Electronic Associated Detection system
US4498076A (en) * 1982-05-10 1985-02-05 Lichtblau G J Resonant tag and deactivator for use in an electronic security system
US4728938A (en) * 1986-01-10 1988-03-01 Checkpoint Systems, Inc. Security tag deactivation system
ATE86403T1 (en) * 1987-04-23 1993-03-15 Actron Entwicklungs Ag METHOD OF DEACTIVATING A RESONANCE TAG AND CIRCUIT ARRANGEMENT FOR CARRYING OUT THE METHOD.

Also Published As

Publication number Publication date
EP0454021B1 (en) 1997-01-08
JP2910873B2 (en) 1999-06-23
ATE147527T1 (en) 1997-01-15
DE59108459D1 (en) 1997-02-20
JPH04229394A (en) 1992-08-18
ES2095267T3 (en) 1997-02-16
EP0454021A1 (en) 1991-10-30

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