CA2104333A1 - Desensitizing apparatus for electromagnetic article surveillance system - Google Patents

Desensitizing apparatus for electromagnetic article surveillance system

Info

Publication number
CA2104333A1
CA2104333A1 CA002104333A CA2104333A CA2104333A1 CA 2104333 A1 CA2104333 A1 CA 2104333A1 CA 002104333 A CA002104333 A CA 002104333A CA 2104333 A CA2104333 A CA 2104333A CA 2104333 A1 CA2104333 A1 CA 2104333A1
Authority
CA
Canada
Prior art keywords
surveillance system
article surveillance
magnets
marker
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.)
Granted
Application number
CA002104333A
Other languages
French (fr)
Other versions
CA2104333C (en
Inventor
Peter J. Zarembo
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 CA2104333A1 publication Critical patent/CA2104333A1/en
Application granted granted Critical
Publication of CA2104333C publication Critical patent/CA2104333C/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 desensitizing apparatus (30) for magnetizing a desensitizable marker (38) used with an electromagnetic article surveillance system. The apparatus includes a rectangular, non-metallic plate (50) positioned so that its length is perpendicular to a likely direction of travel (68) of the marker to be magnetized. A row of X-shaped arrays (60) of elongated magnets (52, 54, 56) is embedded on the plate.
A marker passing over the row of magnets will be desensitized regardless of its orientation or direction of travel over the magnets.
CA002104333A 1992-09-03 1993-08-18 Desensitizing apparatus for electromagnetic article surveillance system Expired - Fee Related CA2104333C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/940,007 US5285182A (en) 1992-09-03 1992-09-03 Desensitizing apparatus for electromagnetic article surveillance system
US07/940007 1992-09-03

Publications (2)

Publication Number Publication Date
CA2104333A1 true CA2104333A1 (en) 1994-03-04
CA2104333C CA2104333C (en) 2001-10-23

Family

ID=25474072

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002104333A Expired - Fee Related CA2104333C (en) 1992-09-03 1993-08-18 Desensitizing apparatus for electromagnetic article surveillance system

Country Status (5)

Country Link
US (1) US5285182A (en)
EP (1) EP0585891B1 (en)
JP (1) JP3419842B2 (en)
CA (1) CA2104333C (en)
DE (1) DE69315645T2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3683585B2 (en) * 1994-03-10 2005-08-17 ミネソタ マイニング アンド マニュファクチャリング カンパニー Deactivators for magnetic markers in electronic article surveillance systems
US5949318A (en) * 1994-08-10 1999-09-07 Sensormatic Electronics Corporation Apparatus for activating/deactivating sensors used with EAS tags
US5594420A (en) * 1995-02-02 1997-01-14 Sensormatic Electronics Corporation Rotating magnet array for deactivating EAS 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
US6002335A (en) * 1998-02-18 1999-12-14 3M Innovative Properties Company Small magnet resensitizer apparatus for use with article surveillance systems
US6057763A (en) * 1998-04-10 2000-05-02 3M Innovative Properties Company Method and apparatus for activating and deactivating electromagnetic article surveillance markers
EP0951000A3 (en) * 1998-04-17 2000-06-21 Meto International GmbH Device for deactivating a security element for the electronic protection of articles
US5920262A (en) * 1998-06-19 1999-07-06 Sensormatic Electronics Corporation Omnidirectional deactivator for magnetic labels or tags of EAS systems
BR9914407A (en) * 1998-10-13 2001-06-26 Minnesota Mining & Mfg Arrangement that demagnetizes the control element to change the condition of a marker
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
US6967578B1 (en) 2004-04-20 2005-11-22 Guida Robert F Hand held security label deactivation device
GB0822617D0 (en) * 2008-12-11 2009-01-21 Courtenay Group Security tag deactivation unit

Family Cites Families (15)

* 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
US4499444A (en) * 1983-05-20 1985-02-12 Minnesota Mining And Manufacturing Company Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
US4665387A (en) * 1983-07-13 1987-05-12 Knogo Corporation Method and apparatus for target deactivation and reactivation in article surveillance systems
US4684930A (en) * 1986-03-18 1987-08-04 Knogo Corporation Method and apparatus for deactivating targets used in electromagnetic type article surveillance systems
US4752758A (en) * 1986-07-21 1988-06-21 Minnesota Mining And Manufacturing Company Demagnetization apparatus for magnetic markers used with article surveilliance systems
US4689590A (en) * 1986-07-21 1987-08-25 Minnesota Mining And Manufacturing Company Demagnetization apparatus for magnetic markers used with electromagnetic article surveillance systems
US4746908A (en) * 1986-09-19 1988-05-24 Minnesota Mining And Manufacturing Company Dual-status, magnetically imagable article surveillance marker
DE3741780A1 (en) * 1987-12-10 1989-06-29 Karl Harms Handels Gmbh & Co K MAGNETIC THEFT OR BURGLAR SECURITY SYSTEM AND SENSOR METAL ELEMENT SUITABLE FOR THIS
US4811000A (en) * 1988-03-03 1989-03-07 Sensormatic Electronics Corporation Article enclosure with magnetic marker deactivating means
US4857891A (en) * 1988-04-29 1989-08-15 Minnesota Mining And Manufacturing Company Random-filament, multi-directionally responsive marker for use in electronic article surveillance systems
US5187462A (en) * 1990-02-15 1993-02-16 Minnesota Mining And Manufacturing Company Multiple magnet assembly for use with electromagnetic article surveillance markers
US5170045A (en) * 1990-03-20 1992-12-08 Esselte Meto Eas Int. Ab Price tag deactivator
SE500627C2 (en) * 1990-03-20 1994-08-01 Esselte Meto Int Gmbh Hand scanner arranged to optically read a bar code on a product
US5121106A (en) * 1990-12-31 1992-06-09 Pitney Bowes Inc. Electronic article surveillance markers with diagonal deactivation elements
US5126720A (en) * 1991-01-17 1992-06-30 Knogo Corporation Method and apparatus for deactivating magnetic targets

Also Published As

Publication number Publication date
JPH07296271A (en) 1995-11-10
US5285182A (en) 1994-02-08
JP3419842B2 (en) 2003-06-23
DE69315645D1 (en) 1998-01-22
EP0585891A1 (en) 1994-03-09
DE69315645T2 (en) 1998-07-16
CA2104333C (en) 2001-10-23
EP0585891B1 (en) 1997-12-10

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