WO1998038606B1 - Active element for magnetomechanical eas marker incorporating particles of bias material - Google Patents
Active element for magnetomechanical eas marker incorporating particles of bias materialInfo
- Publication number
- WO1998038606B1 WO1998038606B1 PCT/US1998/002085 US9802085W WO9838606B1 WO 1998038606 B1 WO1998038606 B1 WO 1998038606B1 US 9802085 W US9802085 W US 9802085W WO 9838606 B1 WO9838606 B1 WO 9838606B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- strip
- alloy
- amorphous
- metal alloy
- magnetostrictive
- Prior art date
Links
- 239000003550 marker Substances 0.000 title claims abstract 6
- 239000002245 particle Substances 0.000 title claims abstract 4
- 239000000463 material Substances 0.000 title 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract 12
- 239000000956 alloy Substances 0.000 claims abstract 10
- 229910045601 alloy Inorganic materials 0.000 claims abstract 9
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 claims abstract 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract 6
- 239000000203 mixture Substances 0.000 claims abstract 4
- 239000010949 copper Substances 0.000 claims abstract 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052796 boron Inorganic materials 0.000 claims abstract 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052803 cobalt Inorganic materials 0.000 claims abstract 2
- 239000010941 cobalt Substances 0.000 claims abstract 2
- 229910052802 copper Inorganic materials 0.000 claims abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052742 iron Inorganic materials 0.000 claims abstract 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000010955 niobium Substances 0.000 claims abstract 2
- 229910052758 niobium Inorganic materials 0.000 claims abstract 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052710 silicon Inorganic materials 0.000 claims abstract 2
- 239000010703 silicon Substances 0.000 claims abstract 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims 2
- 230000005672 electromagnetic field Effects 0.000 claims 1
- 230000005381 magnetic domain Effects 0.000 claims 1
- 239000006249 magnetic particle Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
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.
Claims
AMENDED CLAIMS
[received by the International Bureau on 22 September 1998 (22.09.98); original claims 30 and 32 cancelled; original claims 31 and 33 amended; remaining claims unchanged (2 pages)] first heat-treating a strip of magnetically soft, amorphous magnetostrictive metal alloy to form magnetically semi-hard or hard crystals distributed throughout the bulk of said alloy strip, each of said crystals consisting of a single magnetic domain; and second heat-treating said alloy strip at a temperature below a Curie temperature of said amorphous metal alloy to form a magnetic anisotrσpy in said bulk of said alloy strip. 27. A method according to claim 26, wherein said first heat-treating step is performed at a temperature above said curie temperature of said amorphous metal alloy.
28. A method according to claim 26, wherein said amorphous metal alloy includes iron, cobalt, niobium, copper, boron and silicon.
29. A method according to claim 28, wherein said amorphous metal alloy has a composition consisting essentially of Fe„CobNbI.cu,B15Si6, with 45 ≤ a < 72; 4 ≤ b 30; 2 < c < 6.
31. A magnetostrictive element for use as an active element in a magnetomechanical electronic article surveillance marker, comprising a magnetostrictive alloy which has a composition consisting essentially of Fe„CobNbl.CulB,.sSi6, with 45 ≤ a < 72; 4 < b ≤ 30; 2 < c 6.
33. A magnetomechanical EAS marker, comprising a strip of metal alloy which has a composition consisting essentially of
with 45 ≤ a ≤ 72; 4 < b <
30; 2 < c < 6. 34. A magnetomechanical electronic article surveillance system, comprising:
(a) generating means for generating an electromagnetic field alternating at a selected frequency in an interrogation zone, said generating means including an interrogation coil;
(b) a marker secured to an article appointed for passage through said interrogation zone, said marker including a strip of amorphous magnetostrictive metal
-19-
alloy with crystalline magnetic particles distributed throughout the bulk of said amorphous alloy strip, said crystalline particles being magnetized to magnetically bias said amorphous metal alloy strip so that said strip magnetomechanically resonates when exposed to said alternating field; and
(c) detecting means for detecting said magnetomechanical resonance of said magnetostrictive alloy strip.
-20-
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98904892A EP1016096A4 (en) | 1997-02-14 | 1998-02-04 | Active element for magnetomechanical eas marker incorporating particles of bias material |
| CA002280143A CA2280143C (en) | 1997-02-14 | 1998-02-04 | Active element for magnetomechanical eas marker incorporating particles of bias material |
| AU62657/98A AU725513B2 (en) | 1997-02-14 | 1998-02-04 | Active element for magnetomechanical EAS marker incorporating particles of bias material |
| BR9807836-4A BR9807836A (en) | 1997-02-14 | 1998-02-04 | Active element for magnetomechanical marker for electronic surveillance of articles that incorporates particles of polarization material |
| JP53765398A JP2001513241A (en) | 1997-02-14 | 1998-02-04 | Active element for magneto-mechanical EAS marker containing particles of biasing material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/800,772 US5825290A (en) | 1997-02-14 | 1997-02-14 | Active element for magnetomechanical EAS marker incorporating particles of bias material |
| US08/800,772 | 1997-02-14 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO1998038606A2 WO1998038606A2 (en) | 1998-09-03 |
| WO1998038606A3 WO1998038606A3 (en) | 1998-12-10 |
| WO1998038606B1 true WO1998038606B1 (en) | 1999-01-21 |
Family
ID=25179317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1998/002085 WO1998038606A2 (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)
| 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 |
| GB2381704B (en) * | 2001-09-14 | 2004-06-30 | Roke Manor Research | A tag and 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 |
| US7704346B2 (en) | 2004-02-23 | 2010-04-27 | Checkpoint Systems, Inc. | Method of fabricating a security tag in 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 |
| US7384496B2 (en) * | 2004-02-23 | 2008-06-10 | Checkpoint Systems, Inc. | Security tag system for fabricating a tag including an integrated surface processing system |
| US7116227B2 (en) * | 2004-02-23 | 2006-10-03 | Checkpoint Systems, Inc. | Tag having patterned circuit elements and a process for making same |
| US8099335B2 (en) * | 2004-02-23 | 2012-01-17 | Checkpoint Systems, Inc. | Method and system for determining billing information in a tag fabrication process |
| 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 |
| US9418524B2 (en) | 2014-06-09 | 2016-08-16 | Tyco Fire & Security Gmbh | Enhanced signal amplitude in acoustic-magnetomechanical EAS marker |
| US9275529B1 (en) | 2014-06-09 | 2016-03-01 | Tyco Fire And 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)
| 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 |
| US5565849A (en) * | 1995-02-22 | 1996-10-15 | Sensormatic Electronics Corporation | Self-biased magnetostrictive element for magnetomechanical electronic article surveillance systems |
| 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 |
-
1997
- 1997-02-14 US US08/800,772 patent/US5825290A/en not_active Expired - Fee Related
-
1998
- 1998-02-04 EP EP98904892A patent/EP1016096A4/en not_active Withdrawn
- 1998-02-04 CA CA002280143A patent/CA2280143C/en not_active Expired - Fee Related
- 1998-02-04 AU AU62657/98A patent/AU725513B2/en not_active Ceased
- 1998-02-04 BR BR9807836-4A patent/BR9807836A/en not_active Application Discontinuation
- 1998-02-04 JP JP53765398A patent/JP2001513241A/en not_active Ceased
- 1998-02-04 WO PCT/US1998/002085 patent/WO1998038606A2/en active IP Right Grant
- 1998-02-11 AR ARP980100594A patent/AR011131A1/en unknown
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