EP0961301A4 - A magnetic marker - Google Patents

A magnetic marker

Info

Publication number
EP0961301A4
EP0961301A4 EP98953009A EP98953009A EP0961301A4 EP 0961301 A4 EP0961301 A4 EP 0961301A4 EP 98953009 A EP98953009 A EP 98953009A EP 98953009 A EP98953009 A EP 98953009A EP 0961301 A4 EP0961301 A4 EP 0961301A4
Authority
EP
European Patent Office
Prior art keywords
magnetic
generally
magnetic marker
magnetic material
soft magnetic
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
EP98953009A
Other languages
German (de)
French (fr)
Other versions
EP0961301B1 (en
EP0961301A1 (en
Inventor
Shinji Furukawa
Shuji Ueno
Kenji Amiya
Toshiyuki Hirano
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.)
Unitika Ltd
Original Assignee
Unitika Ltd
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 Unitika Ltd filed Critical Unitika Ltd
Publication of EP0961301A1 publication Critical patent/EP0961301A1/en
Publication of EP0961301A4 publication Critical patent/EP0961301A4/en
Application granted granted Critical
Publication of EP0961301B1 publication Critical patent/EP0961301B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B13/2434—Tag housing and attachment details
    • 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
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0304—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions adapted for large Barkhausen jumps or domain wall rotations, e.g. WIEGAND or MATTEUCCI effect
    • 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
    • H01F1/15391—Elongated structures, e.g. wires

Abstract

A small magnetic marker that can be used with high sensitivity both in a generally-called large Barkhausen system and a generally-called high permeability system. The length of the magnetic marker including a soft magnetic material is not more than 70 mm. The soft magnetic material, when an alternating magnetic field of a strength less than 0.20e is applied thereto, causes steep magnetic reversal with a magnetic flux change of more than 8.0 x 10-9 Wb. The variation of magnetic field strength when the soft magnetic material causes a steep magnetization reversal is preferably 0.10e or less.
EP98953009A 1997-11-17 1998-11-11 A magnetic marker Expired - Lifetime EP0961301B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP31498397 1997-11-17
JP31498397 1997-11-17
PCT/JP1998/005069 WO1999026257A1 (en) 1997-11-17 1998-11-11 A magnetic marker

Publications (3)

Publication Number Publication Date
EP0961301A1 EP0961301A1 (en) 1999-12-01
EP0961301A4 true EP0961301A4 (en) 2001-07-18
EP0961301B1 EP0961301B1 (en) 2007-04-11

Family

ID=18060017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98953009A Expired - Lifetime EP0961301B1 (en) 1997-11-17 1998-11-11 A magnetic marker

Country Status (4)

Country Link
EP (1) EP0961301B1 (en)
DE (1) DE69837528T2 (en)
ES (1) ES2284215T3 (en)
WO (1) WO1999026257A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2847065B1 (en) * 2002-11-13 2005-04-15 C P C Packaging LABEL FOR THE PROTECTION OF AN ARTICLE AGAINST THEFT
FR2847064B1 (en) * 2002-11-13 2005-02-11 C P C Packaging LABEL FOR THE PROTECTION OF AN ARTICLE AGAINST THEFT
AT511332B1 (en) * 2011-08-11 2012-11-15 Suess Dieter Dr METHOD AND DEVICE FOR DISCRIMINATORY DETECTION OF CONTAINERS FOR THE PREPARATION OF FOODS IN EXTRACTION MACHINES USING MAGNETIZABLE MATERIALS
JP2014171044A (en) * 2013-03-01 2014-09-18 Yokohama National Univ Electrical pulse generation apparatus and electrical pulse generation method
WO2017187879A1 (en) * 2016-04-28 2017-11-02 愛知製鋼株式会社 Magnetic marker and driving assistance system
GB2585034A (en) * 2019-06-25 2020-12-30 Endomagnetics Ltd Hyperthermia implants and a method and system for heating the implant
US11166782B1 (en) 2020-07-19 2021-11-09 Sirius Medical Systems B.V. Implantable marker and a method of implanting markers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660025A (en) * 1984-11-26 1987-04-21 Sensormatic Electronics Corporation Article surveillance magnetic marker having an hysteresis loop with large Barkhausen discontinuities
EP0226812A2 (en) * 1985-12-21 1987-07-01 Vacuumschmelze GmbH Security label for theft security system capable of deactivation
GB2264715A (en) * 1989-06-29 1993-09-08 Pitney Bowes Inc Ferromagnetic alloy with high nickel content and high permeability

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5304983A (en) * 1991-12-04 1994-04-19 Knogo Corporation Multiple pulse responder and detection system and method of making and using same
JPH09134817A (en) * 1995-11-08 1997-05-20 Unitika Ltd Magnetic marker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660025A (en) * 1984-11-26 1987-04-21 Sensormatic Electronics Corporation Article surveillance magnetic marker having an hysteresis loop with large Barkhausen discontinuities
EP0226812A2 (en) * 1985-12-21 1987-07-01 Vacuumschmelze GmbH Security label for theft security system capable of deactivation
GB2264715A (en) * 1989-06-29 1993-09-08 Pitney Bowes Inc Ferromagnetic alloy with high nickel content and high permeability

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
KAWAMURA H ET AL: "REINFORCED LARGE BARKHAUSEN AND MATTEUCCI EFFECTS AND MAGNETOELASTIC WAVES IN COLD-DRAWN AND THEN TORSION ANNEALED AMORPHOUS WIRES", IEEE TRANSLATION JOURNAL ON MAGNETICS IN JAPAN,US,IEEE INC, NEW YORK, vol. 4, no. 6, 1 June 1989 (1989-06-01), pages 368 - 377, XP000165636, ISSN: 0882-4959 *
See also references of WO9926257A1 *
YANO N ET AL: "LARGE BARKHAUSEN DISCONTINUITY OF CO-FE-SI-B AMORPHOUS FILMS SPUTTERED ON POLYMER SUBSTRATE", IEEE TRANSACTIONS ON MAGNETICS,US,IEEE INC. NEW YORK, vol. 32, no. 5, 1 September 1996 (1996-09-01), pages 4532 - 4534, XP000634060, ISSN: 0018-9464 *

Also Published As

Publication number Publication date
EP0961301B1 (en) 2007-04-11
ES2284215T3 (en) 2007-11-01
WO1999026257A1 (en) 1999-05-27
EP0961301A1 (en) 1999-12-01
DE69837528D1 (en) 2007-05-24
DE69837528T2 (en) 2007-08-09

Similar Documents

Publication Publication Date Title
EP1061592A3 (en) Magneto-resistance effect element, and its use as memory element
EP1126531A3 (en) Magnetoresistance effect device, and magnetoresistance effect type head, memory device, and amplifying device using the same
SG72760A1 (en) Ferromagnetic tunnel junction magnetoresistive element and magnetic head
WO2002054407A3 (en) Mram write apparatus and method
EP0618456A3 (en) Magneto-optical element and optical magnetic field sensor.
WO2000010172A3 (en) Storage cell array and corresponding production method
CA2044047A1 (en) Magnetic pole configuration for high density thin film recording head
SG86336A1 (en) Magnetic tunnel junction device with improved fixed and free ferromagnetic layers
DE69426318T2 (en) Magnetoresistance effect magnetic head and composite magnetic head
ZA974197B (en) Magnetic detection of discontinuities in magnetic materials.
DE69629264D1 (en) Ferromagnetic GMR material
WO2000022311A3 (en) Magnetic bearing and its use
AU2002243287A1 (en) Tamper-evident package with slider zipper assembly and method of making the same
EP0961301A4 (en) A magnetic marker
EP0871231A3 (en) Magnetoresistive element
CA2336922A1 (en) Integrating magnetic sensor
EP0965987A3 (en) Magneto-optical recording medium
CA2267457A1 (en) Multi-layer magnetic tag
HK1039376A1 (en) Magnetic garnet material and magnetooptical deviceusing the same.
DE69606356D1 (en) Article made of magneto-optical material with soft magnetic moment
EP1311008A4 (en) Magnetoresistance effect device and magnetoresistance effect head comprising the same, and magnetic recording/reproducing apparatus
AU2001261793A1 (en) Method and apparatus for determining the pass through flux of magnetic materials
CA2162999A1 (en) Collector type article surveillance marker having a persistant state
AU2001249945A1 (en) Method and system for the measurement of magnetic fields
EP0901100A3 (en) Magnetic identification element

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR IT

17P Request for examination filed

Effective date: 19991022

A4 Supplementary search report drawn up and despatched

Effective date: 20010531

AK Designated contracting states

Kind code of ref document: A4

Designated state(s): DE ES FR IT

RIC1 Information provided on ipc code assigned before grant

Free format text: 7H 01F 1/12 A, 7H 01F 10/00 B, 7G 08B 13/24 B

17Q First examination report despatched

Effective date: 20040722

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: UNITIKA LTD.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR IT

REF Corresponds to:

Ref document number: 69837528

Country of ref document: DE

Date of ref document: 20070524

Kind code of ref document: P

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2284215

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20080114

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20131108

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20131011

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20150731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141201

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20151229

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69837528

Country of ref document: DE

Representative=s name: DENNEMEYER & ASSOCIATES S.A., DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 69837528

Country of ref document: DE

Owner name: AICHI STEEL CORPORATION, TOKAI-SHI, JP

Free format text: FORMER OWNER: UNITIKA LTD., AMAGASAKI, HYOGO, JP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141112

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20171121

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20171124

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69837528

Country of ref document: DE