WO1999014718A1 - Anzeigeelement für die verwendung in einem magnetischen diebstahlsicherungssystem - Google Patents
Anzeigeelement für die verwendung in einem magnetischen diebstahlsicherungssystem Download PDFInfo
- Publication number
- WO1999014718A1 WO1999014718A1 PCT/DE1998/002421 DE9802421W WO9914718A1 WO 1999014718 A1 WO1999014718 A1 WO 1999014718A1 DE 9802421 W DE9802421 W DE 9802421W WO 9914718 A1 WO9914718 A1 WO 9914718A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- alloy
- strip
- weight
- activation
- semi
- Prior art date
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
Definitions
- the invention relates to a display element for use in a magnetic anti-theft system consisting of:
- An elongated alarm strip made of an amorphous ferromagnetic alloy and at least
- Such magnetic anti-theft systems and display elements are well known and are described in detail, for example, in EP 0 121 649 B1 and in WO 90/03 652.
- magneto-elastic systems in which the activation strip is used to activate the alarm strip by magnetizing
- harmonic systems in which the activation strip serves to deactivate the alarm strip after it has been magnetized.
- Alloys with semi-hard magnetic properties used for the bias strips include Co-Fe-V alloys, e.g. B. are known as Vicalloy, Co-Fe-Ni alloys, which as z. B. Vacozet are known, as well as Fe-Co-Cr alloys, the z. B. are known as Crovac.
- the sub-segments are then magnetized in one direction to activate or deactivate the alarm strip.
- Deactivating or activating a continuous activation strip is magnetized in alternating polarity.
- sub-segments When using sub-segments, on the other hand, they must either be pre-assembled or applied directly in individual parts. Pre-assembly causes higher costs. The application of sub-segments brings considerable benefits problems with the exact geometric assignment of the individual sub-segments on the alarm strip.
- Activation strips on the alarm strips pose significant problems.
- An exact assignment of alarm strips and perforated activation strips can only be guaranteed in a spreading range of approx. +/- 0.5 mm in width.
- some overlap of the holes with the alarm strip is necessary, i. H. the diameter of the holes must be approximately the bandwidth of the alarm strip plus 1 mm, the bandwidth of the band this diameter plus a web width of at least 1 mm.
- an increased use of material and consequently increased material costs are necessary.
- the object of the present invention is therefore to develop the display elements mentioned at the outset with regard to their activation strips in such a way that a distance deactivation is satisfactorily possible with continuous activation strips using simple means.
- this object is achieved in that a) that one or more spatially separated regions which consist of a non-magnetic phase are introduced into the semi-hard magnetic alloy by means of heat treatment, and b) that the semi-hard magnetic alloy has a coercive force H c of 15 to 100 A. / cm and has a remanence B r of at least 0.8 T.
- a heat treatment induces phase transitions from a magnetic crystal structure to a non-magnetic crystal structure in suitable semi-hard magnetic alloys.
- These phase transitions are spatially limited, ie a permanent, irreversible, non-magnetic state is locally produced by locally limited heat input, which leads to a reduction in the effective magnetically conductive cross section.
- the effective magnetically conductive cross section in this area loses the ability to continue to carry the entire magnetic flux.
- the semi-hard magnetic Fe-Co-Cr alloys mentioned above have proven to be particularly suitable.
- Activation strips which are composed of 0.1 to 10% by weight of nickel, 0.1 to 15% by weight of chromium, 0.1 to 15% by weight of molybdenum and the remainder iron in a total proportion of iron, nickel and molybdenum of less than are very particularly suitable 95% by weight of the alloy are composed.
- Such alloys can also contain 0 to 10% by weight of cobalt and / or at least one of the elements Mn, Ti, Zr, Hf, V, Nb, Ta, W, Cu, Al, Si in individual proportions of less than 0.5% by weight of the Alloy and in a total proportion of less than 1% by weight of the alloy and / or at least one of the elements C, N, S, P, B, H, O in individual proportions of less than 0.2% by weight of the alloy and in a total proportion of less than 1% by weight of the alloy.
- the alloy is characterized by a coercive force H c of 30 to 60 A / cm and a remanence B r of at least 0.8 T.
- alloys are extremely ductile and extremely cold formable. Activation strips with thicknesses of 0.04 to 0.07 mm can be produced with these alloys. Furthermore, these alloys are characterized by cellular magnetic properties and high corrosion resistance.
- the bias strips are made by melting the alloy under vacuum and casting into a ingot.
- the casting block is then hot-rolled into a strip at temperatures above approximately 800 ° C., then annealed at a temperature of approximately 1100 ° C. and then rapidly cooled.
- This is followed by cold working, suitably cold rolling, in accordance with a cross-sectional reduction of at least 75%, preferably 85% or higher.
- the cold-rolled strip is tempered at temperatures of approx. 500 ° C to 800 ° C.
- this local heat treatment can be carried out by a laser, the interaction time, the beam focusing of the laser and the power input of the laser being adapted in such a way that the heat affected zone corresponds to the geometric dimensions of the spatially separated non-magnetic regions to be achieved .
- the activation strips which have not yet been cut to length, are guided over a heated gearwheel, the gearwheel width of which approximately corresponds to the extent of the non-magnetic areas to be achieved, and the spacing of the individual teeth should correspond to the extent of the magnetic areas.
- the gear is brought to a temperature that is above the phase transition temperature.
- Show 1 shows an alarm strip with a continuous elongated activation strip according to the prior art
- FIG. 2 shows an alarm strip with applied segmentation according to the prior art
- Figure 4 shows an alarm strip with a continuous applied activation strip according to the present invention.
- Figure 1 shows an alarm strip 2 with a continuous elongated activation strip la according to the prior art.
- the elongated activation strip la is continuous and magnetized in an alternating polarity.
- the continuous activation strip la can only be magnetized satisfactorily if it is brought very close to the source of the external magnetic field. With such a continuous activation strip, a distance activation or distance deactivation is therefore only unsatisfactorily possible.
- FIG. 2 shows an alarm strip 2 on which a plurality of partially segmented activation strips 1b are applied.
- This alarm strip 2 is activated or deactivated by magnetizing the sub-segments 1b.
- the magnetization of the partial segments 1b in one direction can take place at a substantially greater distance from the source of the external magnetic field due to the directional homogeneity.
- FIG. 2 shows an alarm strip 2 on which a plurality of partially segmented activation strips 1b are applied.
- This alarm strip 2 is activated or deactivated by magnetizing the sub-segments 1b.
- the magnetization of the partial segments 1b in one direction can take place at a substantially greater distance from the source of the external magnetic field due to the directional homogeneity.
- FIG. 2 shows an alarm strip 2 on which a plurality of partially segmented activation strips 1b are applied.
- FIG. 3 shows a continuous alarm strip 2 with an applied continuous activation strip 1c.
- This activation strip lc is provided with holes 3.
- the sub-segment structure of FIG. 2 is simulated through these holes 3.
- the geometrical assignment of the holes 3 of the activation strip 1c on the alarm strip 2 is associated with considerable problems.
- the diameter of the holes 3 must be approximately the width of the alarm strip plus 1 mm, the bandwidth of the activation strip 1c this diameter plus a web width of at least 1 mm. This means that the activation strip 1c must be considerably wider than the alarm strip 2 in order to allow the label to function reliably.
- Figure 4 illustrates the present invention. As can be seen from Figure 4, is an elongated
- Alarm strip 2 in turn an elongated continuous activation strip lb applied.
- elongated activation strip 1d two spatially separated areas 4 are introduced, which consist of a non-magnetic phase.
- non-magnetic regions 4 are achieved by heat treatment of the activation strip 1d. Phase transitions from a magnetic crystal structure to a non-magnetic crystal structure are induced in a suitable semi-hard magnetic alloy. These phase transitions are spatially limited so that the areas 4 have no overlap.
- a locally limited heat input therefore locally creates a permanent, irreversible, non-magnetic state, which leads to a reduction in the effective magnetically conductive cross section.
- the semi-hard magnetic activation strip 1b shown in FIG. 4 consists of an Fe-Co-Cr alloy.
- the activation strips shown in FIGS. 1 to 4 consist of 0.1 to 10% by weight of nickel, 0.1 to 15% by weight of chromium, 0.1 to 15% by weight of molybdenum and the remainder iron in a total proportion of iron, nickel and molybdenum less than 95% by weight of the alloy.
- the activation strip 1d shown was produced by the following method:
- the activation strips are then heat treated with a laser to achieve the non-magnetic areas.
- the activation strips are heat-treated in a continuous process before being cut to length.
- the activation strips are passed through a heated gearwheel whose gearwheel width corresponds approximately to the extent of the non-magnetic areas to be achieved.
- the distances between the individual teeth of the gear correspond to the dimensions of the magnetic areas.
- the gear is brought to a temperature that is above the phase transition temperature
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Burglar Alarm Systems (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51726899A JP2001505344A (ja) | 1997-09-17 | 1998-08-19 | 磁気式盗難防護システムに用いられる表示素子 |
US09/308,286 US6166636A (en) | 1997-09-17 | 1998-08-19 | Marker for use in a magnetic anti-theft security system and method for making same |
EP98951172A EP0939943A1 (de) | 1997-09-17 | 1998-08-19 | Anzeigeelement für die verwendung in einem magnetischen diebstahlsicherungssystem |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19740908.3 | 1997-09-17 | ||
DE19740908A DE19740908C1 (de) | 1997-09-17 | 1997-09-17 | Anzeigeelement für die Verwendung in einem magnetischen Diebstahlsicherungssystem und Verfahren zur Herstellung eines Aktivierungsstreifens hierfür |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999014718A1 true WO1999014718A1 (de) | 1999-03-25 |
Family
ID=7842659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/002421 WO1999014718A1 (de) | 1997-09-17 | 1998-08-19 | Anzeigeelement für die verwendung in einem magnetischen diebstahlsicherungssystem |
Country Status (5)
Country | Link |
---|---|
US (1) | US6166636A (de) |
EP (1) | EP0939943A1 (de) |
JP (1) | JP2001505344A (de) |
DE (1) | DE19740908C1 (de) |
WO (1) | WO1999014718A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19732872C2 (de) * | 1997-07-30 | 2002-04-18 | Vacuumschmelze Gmbh | Anzeigeelement für die Verwendung in einem magnetischen Diebstahlsicherungssystem |
US6803118B2 (en) * | 1997-07-30 | 2004-10-12 | Vacuumschmelze Gmbh | Marker for use in a magnetic anti-theft security system |
US6011475A (en) * | 1997-11-12 | 2000-01-04 | Vacuumschmelze Gmbh | Method of annealing amorphous ribbons and marker for electronic article surveillance |
DE10063117A1 (de) * | 2000-12-18 | 2003-06-18 | Alstom Switzerland Ltd | Umwandlungskontrollierter Nitrid-ausscheidungshärtender Vergütungsstahl |
WO2004088606A1 (en) * | 2003-03-31 | 2004-10-14 | A.C.S. Advanced Coding Systems Ltd. | Method of manufactureing deactivating elements for magnetic markers |
ES2268964B1 (es) * | 2005-04-21 | 2008-04-16 | Micromag 2000, S.L. | "etiqueta magnetica activable/desactivable basada en microhilo magnetico y metodo de obtencion de la misma". |
DE102006047021B4 (de) * | 2006-10-02 | 2009-04-02 | Vacuumschmelze Gmbh & Co. Kg | Anzeigeelement für ein magnetisches Diebstahlsicherungssystem sowie Verfahren zu dessen Herstellung |
DE102006047022B4 (de) | 2006-10-02 | 2009-04-02 | Vacuumschmelze Gmbh & Co. Kg | Anzeigeelement für ein magnetisches Diebstahlsicherungssystem sowie Verfahren zu dessen Herstellung |
US7432815B2 (en) | 2006-10-05 | 2008-10-07 | Vacuumschmelze Gmbh & Co. Kg | Marker for a magnetic theft protection system and method for its production |
JP5263651B2 (ja) | 2007-03-30 | 2013-08-14 | 日立金属株式会社 | 半硬質磁性材料、磁気マーカ用バイアス材、磁気マーカ |
DE102009043539A1 (de) * | 2009-09-30 | 2011-04-21 | Vacuumschmelze Gmbh & Co. Kg | Magnetischer Streifen, Sensor aufweisend einen magnetischen Streifen und Verfahren zur Herstellung eines magnetischen Streifens |
DE102009043462A1 (de) * | 2009-09-30 | 2011-03-31 | Vacuumschmelze Gmbh & Co. Kg | Magnetischer Streifen, Sensor aufweisend einen magnetischen Streifen und Verfahren zur Herstellung eines magnetischen Streifens |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3820104A (en) | 1972-12-15 | 1974-06-25 | Stop Loss Inc | Method and system for detecting an object within a magnetic field interrogation zone |
EP0121649A1 (de) * | 1983-02-04 | 1984-10-17 | Allied Corporation | Amorphes Antidiebstahl-Markierungselement |
WO1990003652A1 (en) | 1988-09-26 | 1990-04-05 | Allied-Signal Inc. | Metallic glass alloys for mechanically resonant target surveillance systems |
EP0585782A2 (de) * | 1992-08-31 | 1994-03-09 | Aichi Steel Works, Ltd. | Zusammengesetztes magnetisches Element und Verfahren zur dessen Herstellung |
EP0634759A2 (de) * | 1993-07-14 | 1995-01-18 | Vacuumschmelze Gmbh | Halbharte verformbare Dauermagnetlegierung auf Eisenbasis |
WO1998026434A1 (de) * | 1996-12-13 | 1998-06-18 | Vacuumschmelze Gmbh | Anzeigeelement für die verwendung in einem magnetischen diebstahlsicherungssystem |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3938125A (en) * | 1974-02-20 | 1976-02-10 | Minnesota Mining And Manufacturing Company | Antipilferage system and marker therefor |
US4510489A (en) * | 1982-04-29 | 1985-04-09 | Allied Corporation | Surveillance system having magnetomechanical marker |
DE3236115A1 (de) * | 1982-09-29 | 1984-03-29 | Max Planck Gesellschaft zur Förderung der Wissenschaften e.V., 3400 Göttingen | Verfahren zur stromlosen abscheidung von metallschichten auf oberflaechen von metallen |
US4536229A (en) * | 1983-11-08 | 1985-08-20 | At&T Bell Laboratories | Fe-Ni-Mo magnet alloys and devices |
ES2040343T3 (es) * | 1987-06-08 | 1993-10-16 | Esselte Meto International Gmbh | Dispositivos magneticos. |
GB8818849D0 (en) * | 1988-08-09 | 1988-09-14 | Emi Plc Thorn | Electromagnetic identification system |
US5313192A (en) * | 1992-07-02 | 1994-05-17 | Sensormatic Electronics Corp. | Deactivatable/reactivatable magnetic marker having a step change in magnetic flux |
US5527399A (en) * | 1993-08-30 | 1996-06-18 | The Arnold Engineering Company | Magnetic strips and methods for making the same |
US5539380A (en) * | 1995-04-13 | 1996-07-23 | Alliedsignal Inc. | Metallic glass alloys for mechanically resonant marker surveillance systems |
-
1997
- 1997-09-17 DE DE19740908A patent/DE19740908C1/de not_active Expired - Fee Related
-
1998
- 1998-08-19 US US09/308,286 patent/US6166636A/en not_active Expired - Lifetime
- 1998-08-19 EP EP98951172A patent/EP0939943A1/de not_active Ceased
- 1998-08-19 JP JP51726899A patent/JP2001505344A/ja active Pending
- 1998-08-19 WO PCT/DE1998/002421 patent/WO1999014718A1/de not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3820104A (en) | 1972-12-15 | 1974-06-25 | Stop Loss Inc | Method and system for detecting an object within a magnetic field interrogation zone |
EP0121649A1 (de) * | 1983-02-04 | 1984-10-17 | Allied Corporation | Amorphes Antidiebstahl-Markierungselement |
EP0121649B1 (de) | 1983-02-04 | 1989-03-29 | Allied Corporation | Amorphes Antidiebstahl-Markierungselement |
WO1990003652A1 (en) | 1988-09-26 | 1990-04-05 | Allied-Signal Inc. | Metallic glass alloys for mechanically resonant target surveillance systems |
EP0585782A2 (de) * | 1992-08-31 | 1994-03-09 | Aichi Steel Works, Ltd. | Zusammengesetztes magnetisches Element und Verfahren zur dessen Herstellung |
EP0634759A2 (de) * | 1993-07-14 | 1995-01-18 | Vacuumschmelze Gmbh | Halbharte verformbare Dauermagnetlegierung auf Eisenbasis |
WO1998026434A1 (de) * | 1996-12-13 | 1998-06-18 | Vacuumschmelze Gmbh | Anzeigeelement für die verwendung in einem magnetischen diebstahlsicherungssystem |
Also Published As
Publication number | Publication date |
---|---|
US6166636A (en) | 2000-12-26 |
JP2001505344A (ja) | 2001-04-17 |
EP0939943A1 (de) | 1999-09-08 |
DE19740908C1 (de) | 1999-08-05 |
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