CA2149611A1 - Apparatus for deactivation of electronic article surveillance tags - Google Patents

Apparatus for deactivation of electronic article surveillance tags

Info

Publication number
CA2149611A1
CA2149611A1 CA002149611A CA2149611A CA2149611A1 CA 2149611 A1 CA2149611 A1 CA 2149611A1 CA 002149611 A CA002149611 A CA 002149611A CA 2149611 A CA2149611 A CA 2149611A CA 2149611 A1 CA2149611 A1 CA 2149611A1
Authority
CA
Canada
Prior art keywords
electronic article
article surveillance
reference signal
deactivation
surveillance tags
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.)
Granted
Application number
CA002149611A
Other languages
French (fr)
Other versions
CA2149611C (en
Inventor
Ronald B. Easter
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.)
Sensormatic Electronics LLC
Original Assignee
Sensormatic Electronics Corp
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 Sensormatic Electronics Corp filed Critical Sensormatic Electronics Corp
Publication of CA2149611A1 publication Critical patent/CA2149611A1/en
Application granted granted Critical
Publication of CA2149611C publication Critical patent/CA2149611C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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

Abstract

A deactivator for deactivating electronic article surveillance tags includes a deactivating coil, drive circuitry controllable for supplying driving signals to the deactivating coil, a reference signal generator for generating a reference signal having preselected characteristics varying with time, a comparator for comparing characteristics of the driving signals with the reference signal characteristics, and a control unit for controlling the drive circuitry in accordance with signal comparisons effected by the comparator.
CA002149611A 1994-08-09 1995-05-17 Apparatus for deactivation of electronic article surveillance tags Expired - Fee Related CA2149611C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/287,772 US5493275A (en) 1994-08-09 1994-08-09 Apparatus for deactivation of electronic article surveillance tags
US08/287,772 1994-08-09

Publications (2)

Publication Number Publication Date
CA2149611A1 true CA2149611A1 (en) 1996-02-10
CA2149611C CA2149611C (en) 2008-04-01

Family

ID=23104278

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002149611A Expired - Fee Related CA2149611C (en) 1994-08-09 1995-05-17 Apparatus for deactivation of electronic article surveillance tags

Country Status (6)

Country Link
US (1) US5493275A (en)
EP (1) EP0696785B1 (en)
JP (1) JP3877792B2 (en)
BR (1) BR9503574A (en)
CA (1) CA2149611C (en)
DE (1) DE69509321T2 (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5781111A (en) * 1996-09-26 1998-07-14 Sensormatic Electronics Corporation Apparatus for deactivation of electronic article surveillance tags
US6144544A (en) * 1996-10-01 2000-11-07 Milov; Vladimir N. Apparatus and method for material treatment using a magnetic field
US5867101A (en) * 1997-02-03 1999-02-02 Sensormatic Electronics Corporation Multi-phase mode multiple coil distance deactivator for magnetomechanical EAS markers
US6111507A (en) * 1997-02-03 2000-08-29 Sensormatic Electronics Corporation Energizing circuit for EAS marker deactivation device
US6060988A (en) * 1997-02-03 2000-05-09 Sensormatic Electronics Corporation EAS marker deactivation device having core-wound energized coils
US5867102C1 (en) * 1997-02-27 2002-09-10 Wallace Comp Srvices Inc Electronic article surveillance label assembly and method of manufacture
US5917412A (en) * 1997-05-21 1999-06-29 Sensormatic Electronics Corporation Deactivation device with biplanar deactivation
US6647844B1 (en) 1997-05-22 2003-11-18 Moore Wallace Incorporated Precise strip material cutter
US6096153A (en) * 1997-05-22 2000-08-01 Wallace Computer Services, Inc. System for continuously manufacturing security tags
US6011474A (en) * 1998-04-28 2000-01-04 Sensormatic Electronics Corporation Multiple-use deactivation device for electronic article surveillance markers
US5907465A (en) * 1998-08-13 1999-05-25 Sensormatic Electronics Corporation Circuit for energizing EAS marker deactivation device with DC pulses of alternating polarity
US6181249B1 (en) * 1999-01-07 2001-01-30 Sensormatic Electronics Corporation Coil driving circuit for EAS marker deactivation device
US6084515A (en) * 1999-01-07 2000-07-04 Sensormatic Electronics Corporation Coil array for EAS marker deactivation device
US20020071293A1 (en) * 2000-07-13 2002-06-13 Eden Richard C. Power semiconductor switching devices, power converters, integrated circuit assemblies, integrated circuitry, power current switching methods, methods of forming a power semiconductor switching device, power conversion methods, power semiconductor switching device packaging methods, and methods a of forming power transistor
US6696951B2 (en) * 2001-06-13 2004-02-24 3M Innovative Properties Company Field creation in a magnetic electronic article surveillance system
US7323233B2 (en) * 2002-09-26 2008-01-29 Scimed Life Systems, Inc. Sheath materials and processes
US7119691B2 (en) * 2003-10-17 2006-10-10 Sensormatic Electronics Corporation Electronic article surveillance marker deactivator using phase control deactivation
US6946962B2 (en) * 2003-10-29 2005-09-20 Sensormatic Electronics Corporation Electronic article surveillance marker deactivator using inductive discharge
US7239235B2 (en) * 2004-04-01 2007-07-03 Williams Controls Industries, Inc. Non-contact sensor idle validation switch
US7068172B2 (en) * 2004-05-21 2006-06-27 Xiao Hui Yang Method and apparatus for deactivating an EAS device
CN101088110A (en) * 2004-11-22 2007-12-12 传感电子公司 H-bridge activator/deactivator and method for activating/deactivating EAS tags
US7327261B2 (en) * 2005-07-27 2008-02-05 Zih Corp. Visual identification tag deactivation
US20090212952A1 (en) * 2008-02-22 2009-08-27 Xiao Hui Yang Method and apparatus for de-activating eas markers
DE102011050129A1 (en) * 2011-05-05 2012-11-08 Maxim Integrated Gmbh transponder
CN109859716B (en) * 2019-04-09 2021-02-05 上海中航光电子有限公司 Liquid crystal display panel, display device and driving method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983552A (en) * 1975-01-14 1976-09-28 American District Telegraph Company Pilferage detection systems
JPS615622Y2 (en) * 1978-09-08 1986-02-20
US4621299A (en) * 1982-11-05 1986-11-04 General Kinetics Inc. High energy degausser
DE3244431A1 (en) * 1982-12-01 1984-06-07 Rheinmetall GmbH, 4000 Düsseldorf DEVICE FOR DEACTIVATING A SECURING STRIP CONTAINING MAGNETIZABLE LAYERS
US4617603A (en) * 1985-02-27 1986-10-14 Ixi Laboratories, Inc. Degaussing system for bulk demagnetization of previously magnetized materials
EP0431745A3 (en) * 1989-12-08 1991-11-21 Minnesota Mining And Manufacturing Company Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
JP2981252B2 (en) * 1990-03-28 1999-11-22 株式会社東芝 Degaussing circuit
US5341125A (en) * 1992-01-15 1994-08-23 Sensormatic Electronics Corporation Deactivating device for deactivating EAS dual status magnetic tags
US5313192A (en) * 1992-07-02 1994-05-17 Sensormatic Electronics Corp. Deactivatable/reactivatable magnetic marker having a step change in magnetic flux

Also Published As

Publication number Publication date
EP0696785A1 (en) 1996-02-14
JP3877792B2 (en) 2007-02-07
DE69509321T2 (en) 1999-11-18
DE69509321D1 (en) 1999-06-02
CA2149611C (en) 2008-04-01
US5493275A (en) 1996-02-20
BR9503574A (en) 1996-06-04
EP0696785B1 (en) 1999-04-28
JPH0863676A (en) 1996-03-08

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130517