CA2280143A1 - Active element for magnetomechanical eas marker incorporating particles of bias material - Google Patents

Active element for magnetomechanical eas marker incorporating particles of bias material Download PDF

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Publication number
CA2280143A1
CA2280143A1 CA002280143A CA2280143A CA2280143A1 CA 2280143 A1 CA2280143 A1 CA 2280143A1 CA 002280143 A CA002280143 A CA 002280143A CA 2280143 A CA2280143 A CA 2280143A CA 2280143 A1 CA2280143 A1 CA 2280143A1
Authority
CA
Canada
Prior art keywords
amorphous alloy
strip
amorphous
eas marker
alloy strip
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
CA002280143A
Other languages
French (fr)
Other versions
CA2280143C (en
Inventor
Ming-Ren Lian
Robert C. O'handley
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 Corp
Original Assignee
Sensormatic Electronics Corporation
Ming-Ren Lian
Robert C. O'handley
Tyco Acquisition Corp. Xxiv
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 Corporation, Ming-Ren Lian, Robert C. O'handley, Tyco Acquisition Corp. Xxiv filed Critical Sensormatic Electronics Corporation
Publication of CA2280143A1 publication Critical patent/CA2280143A1/en
Application granted granted Critical
Publication of CA2280143C publication Critical patent/CA2280143C/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
    • 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
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/244—Tag manufacturing, e.g. continuous manufacturing processes
    • 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
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15308—Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15341—Preparation processes therefor
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N35/00—Magnetostrictive devices
    • H10N35/80—Constructional details
    • H10N35/85—Magnetostrictive active materials

Abstract

A self-biasing magnetostrictive element (10) for use in a magnetomechanical EAS marker is a strip of amorphous alloy material distributed throughout the bulk of the amorphous alloy strip. The crystalline particles (12) are magnetized to bias the amorphous alloy strip (14) to resonate in response to an interrogation signal. The crystalline particles (12) are formed by heat-treating the amorphous alloy strip (14) at a temperature above the Curie temperature of the amorphous alloy in the presence of a longitudinal magnetic field. The alloy strip (14) is then cross-field annealed at a temperature below the Curie temperature of the amorphous alloy to form a transverse anisotropy in the amorphous bulk of the alloy strip (14). A
preferred alloy composition includes iron, cobalt, niobium, copper, boron and silicon.
CA002280143A 1997-02-14 1998-02-04 Active element for magnetomechanical eas marker incorporating particles of bias material Expired - Fee Related CA2280143C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/800,772 1997-02-14
US08/800,772 US5825290A (en) 1997-02-14 1997-02-14 Active element for magnetomechanical EAS marker incorporating particles of bias material
PCT/US1998/002085 WO1998038606A2 (en) 1997-02-14 1998-02-04 Active element for magnetomechanical eas marker incorporating particles of bias material

Publications (2)

Publication Number Publication Date
CA2280143A1 true CA2280143A1 (en) 1998-09-03
CA2280143C CA2280143C (en) 2008-12-09

Family

ID=25179317

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002280143A Expired - Fee Related CA2280143C (en) 1997-02-14 1998-02-04 Active element for magnetomechanical eas marker incorporating particles of bias material

Country Status (8)

Country Link
US (1) US5825290A (en)
EP (1) EP1016096A4 (en)
JP (1) JP2001513241A (en)
AR (1) AR011131A1 (en)
AU (1) AU725513B2 (en)
BR (1) BR9807836A (en)
CA (1) CA2280143C (en)
WO (1) WO1998038606A2 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6229445B1 (en) * 1997-01-13 2001-05-08 Tecsec, Incorporated RF identification process and apparatus
US5999098A (en) * 1998-02-03 1999-12-07 Sensormatic Electronics Corporation Redistributing magnetic charge in bias element for magnetomechanical EAS marker
US5982282A (en) * 1998-09-16 1999-11-09 Sensormatic Electronics Corporation Product authentication indicia concealed in magnetomechanical EAS marker
JP4128721B2 (en) * 2000-03-17 2008-07-30 株式会社東芝 Information record article
KR20020006170A (en) * 2000-07-11 2002-01-19 김창경 Magnetized Self-Biased Magnetoelastic Sensor for Electronic Article Surveillance and Article Identification
US7568630B2 (en) * 2001-09-14 2009-08-04 Roke Manor Research Limited RF tag and RF tagging system
US7193715B2 (en) * 2002-11-14 2007-03-20 Tokyo Electron Limited Measurement of overlay using diffraction gratings when overlay exceeds the grating period
US8099335B2 (en) * 2004-02-23 2012-01-17 Checkpoint Systems, Inc. Method and system for determining billing information in a tag fabrication process
US7704346B2 (en) 2004-02-23 2010-04-27 Checkpoint Systems, Inc. Method of fabricating a security tag in an integrated surface processing system
US7384496B2 (en) 2004-02-23 2008-06-10 Checkpoint Systems, Inc. Security tag system for fabricating a tag including an integrated surface processing system
US7138919B2 (en) * 2004-02-23 2006-11-21 Checkpoint Systems, Inc. Identification marking and method for applying the identification marking to an item
US7119685B2 (en) * 2004-02-23 2006-10-10 Checkpoint Systems, Inc. Method for aligning capacitor plates in a security tag and a capacitor formed thereby
US7116227B2 (en) * 2004-02-23 2006-10-03 Checkpoint Systems, Inc. Tag having patterned circuit elements and a process for making same
US9897556B2 (en) 2014-05-08 2018-02-20 National Technology & Engineering Solutions Of Sandia, Llc Elemental analysis using temporal gating of a pulsed neutron generator
US9275529B1 (en) 2014-06-09 2016-03-01 Tyco Fire And Security Gmbh Enhanced signal amplitude in acoustic-magnetomechanical EAS marker
US9418524B2 (en) 2014-06-09 2016-08-16 Tyco Fire & Security Gmbh Enhanced signal amplitude in acoustic-magnetomechanical EAS marker
ES2581127B2 (en) * 2016-04-13 2017-05-04 Universidad Complutense De Madrid Label, system and method for long-distance object detection
RU2638848C1 (en) * 2016-06-29 2017-12-18 Акционерное общество "ГОЗНАК" Valuable document protected from forgery and method of determining its authenticity

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2805212C3 (en) * 1978-02-08 1980-10-02 Windmoeller & Hoelscher, 4540 Lengerich Device for checking the bottom folds of bottoms formed on pieces of tubing
US4510489A (en) * 1982-04-29 1985-04-09 Allied Corporation Surveillance system having magnetomechanical marker
GB8713353D0 (en) * 1987-06-08 1987-07-15 Scient Generics Ltd Magnetic article surveillance systems
JP2713711B2 (en) * 1987-11-17 1998-02-16 日立金属株式会社 Security sensor marker
GB8817855D0 (en) * 1988-07-27 1988-09-01 Emi Plc Thorn Electromagnetic identification system
US5252144A (en) * 1991-11-04 1993-10-12 Allied Signal Inc. Heat treatment process and soft magnetic alloys produced thereby
KR950034083A (en) * 1994-02-10 1995-12-26 오가 노리오 Magnetic head
US5568125A (en) * 1994-06-30 1996-10-22 Sensormatic Electronics Corporation Two-stage annealing process for amorphous ribbon used in an EAS marker
US5469140A (en) * 1994-06-30 1995-11-21 Sensormatic Electronics Corporation Transverse magnetic field annealed amorphous magnetomechanical elements for use in electronic article surveillance system and method of making same
US5565849A (en) * 1995-02-22 1996-10-15 Sensormatic Electronics Corporation Self-biased magnetostrictive element for magnetomechanical electronic article surveillance systems

Also Published As

Publication number Publication date
AU725513B2 (en) 2000-10-12
WO1998038606A2 (en) 1998-09-03
BR9807836A (en) 2000-06-06
JP2001513241A (en) 2001-08-28
WO1998038606A3 (en) 1998-12-10
AU6265798A (en) 1998-09-18
EP1016096A2 (en) 2000-07-05
US5825290A (en) 1998-10-20
CA2280143C (en) 2008-12-09
EP1016096A4 (en) 2002-05-22
AR011131A1 (en) 2000-08-02

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