EP0944885B1 - Label for use in acousto-magnetic anti-theft devices - Google Patents
Label for use in acousto-magnetic anti-theft devices Download PDFInfo
- Publication number
- EP0944885B1 EP0944885B1 EP97952717A EP97952717A EP0944885B1 EP 0944885 B1 EP0944885 B1 EP 0944885B1 EP 97952717 A EP97952717 A EP 97952717A EP 97952717 A EP97952717 A EP 97952717A EP 0944885 B1 EP0944885 B1 EP 0944885B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lies
- magnetoelastically
- strip
- label according
- excitable
- 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.)
- Expired - Lifetime
Links
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 3
- 230000009849 deactivation Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims 5
- 230000000737 periodic effect Effects 0.000 claims 3
- 239000012790 adhesive layer Substances 0.000 claims 2
- 230000005389 magnetism Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 238000004080 punching Methods 0.000 claims 1
- 230000005415 magnetization Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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
-
- 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
- H01F1/15316—Amorphous metallic alloys, e.g. glassy metals based on Co
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
Definitions
- Acoustic magnetic anti-theft labels are put on Base of an amorphous strip as a resonator and a magnetic one semi-hard strip arranged in parallel for adjustment the resonance frequency used.
- This magnetoelastic Strips usually contain surveillance strips, that of a preferably amorphous alloy with high magnetostriction consist and the mechanically free in a label are mobile.
- amorphous alloys are based e.g. on alloy systems, which also contain Ni in addition to Fe (WO 90/03652), or in addition to Fe also contain Ni and Co (German utility model G94 12 456.6) and by an external excitation with a Alternating field pulse to longitudinal, mechanical resonance vibrations be stimulated.
- Such magnetoelastic excitable labels for surveillance and identification systems that consist of a magnetic semi-hard strips for deactivation and an amorphous Strips as a resonator are also from WO-A-96/32731 known.
- the characteristic of the label is that Resonance frequency of the amorphous stripe, which in addition to the length of the label also from the DC field magnetization of the parallel magnetically semi-hard strip depends.
- the adjustment of the amorphous stripe in its length on the flow of the magnetized magnetically semi-hard The strip determines the resonance frequency of the label when activated Status. This resonance frequency must differ significantly the resonance frequency of the amorphous strip without or with little Distinguish DC field magnetization as this Shift of the resonance frequency to deactivate the labels is needed.
- the labels are also free shown vibrating amorphous stripes, so the label length exactly half the wavelength of the resonance frequency equivalent.
- the width of the strips can be reduced.
- the invention relates to the manufacture and design of Labels for use in security and identification systems, where the magnetoelastic surveillance strip is fixed on one side and vibrates in the system excited with a 1/4 wavelength of the resonance frequency becomes.
- the invention further relates to the comparison of the properties of the label during manufacture, so that in A significant reduction compared to the prior art the requirements for the strips used (preferably amorphous and magnetic semi-hard) can be achieved.
- An amorphous strip made of VITROVAC 7250 (Fe-Co-Ni-Si-BC) with a width of 6 mm and a thickness of 25 ⁇ m is attached to this magnetically semi-hard SEMIVAC 90 by spot welding, with a linear magnetization curve in the amorphous strip through heat treatment in the field , a defined magnetostriction (from this follows the magnetoelastic resonance behavior) and a transverse curvature.
- the spot weld fixings consist of one or more weld spots next to each other, each of which fix the amorphous strip on the SEMIVAC 90 at a distance of exactly 23 mm.
- the magnetically semi-hard strip is magnetized and the resonance frequency of the amorphous strip is measured.
- the exact positioning of the punch holes to the following spot welds is calculated from the measured resonance frequency, so that a close tolerance of the resonance frequency (e.g. 58 kHz ⁇ 100 Hz) can also be achieved with larger standard deviations of both strips, provided that the variation of the properties is above Lengths occurs, which is long compared to the label length (approx. 20 mm).
- flux changes of the magnetic, semi-hard strip of ⁇ 20% could be corrected, whereas with conventional labels, ⁇ 5% already lead to problems in production.
- the label production is completed by placing a plastic profile part, which protects the free-swinging end of the amorphous strip against mechanical manipulations in the application.
- Another embodiment of the labels according to the invention substitutes the spot welding process by applying cross-glued double-sided adhesive strips, the corresponding the spot welds the fixation of the amorphous Stripes at regular intervals.
- the other The manufacturing process is analogous.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
- Soft Magnetic Materials (AREA)
Description
Akustomagnetische Diebstahlsicherungsetiketten werden auf Basis eines amorphen Streifens als Resonator und eines magnetisch halbharten parallel angeordneten Streifens zur Einstellung der Resonanzfrequenz eingesetzt. Diese magnetoelastischen Streifen enthalten üblicherweise Überwachungsstreifen, die aus einer vorzugsweise amorphen Legierung mit hoher Magnetostriktion bestehen und die mechanisch frei in einem Etikett beweglich sind.Acoustic magnetic anti-theft labels are put on Base of an amorphous strip as a resonator and a magnetic one semi-hard strip arranged in parallel for adjustment the resonance frequency used. This magnetoelastic Strips usually contain surveillance strips, that of a preferably amorphous alloy with high magnetostriction consist and the mechanically free in a label are mobile.
Diese amorphen Legierungen basieren z.B. auf Legierungssystemen, die neben Fe auch Ni enthalten (WO 90 / 03652), oder die neben Fe auch Ni und Co enthalten (Deutsches Gebrauchsmuster G94 12 456.6) und die durch eine äußere Erregung mit einem Wechselfeldimpuls zu longitudinalen, mechanischen Resonanzschwingungen angeregt werden.These amorphous alloys are based e.g. on alloy systems, which also contain Ni in addition to Fe (WO 90/03652), or in addition to Fe also contain Ni and Co (German utility model G94 12 456.6) and by an external excitation with a Alternating field pulse to longitudinal, mechanical resonance vibrations be stimulated.
Solche magnetoelastisch anregbaren Etiketten für Überwachungs- und Identifizierungssysteme, die aus einem magnetisch halbharten Streifen zur Deaktivierung und einem amorphen Streifen als Resonator bestehen, sind auch aus der WO-A-96/32731 bekannt.Such magnetoelastic excitable labels for surveillance and identification systems that consist of a magnetic semi-hard strips for deactivation and an amorphous Strips as a resonator are also from WO-A-96/32731 known.
Aufgrund der magnetostriktiven Kopplung bewirken die mit der Schwingung verknüpften mechanischen Spannungen eine Magnetisierungsänderung, welche in der Empfängerspule eine entsprechende Wechselspannung induziert, womit das Etikett nachgewiesen werden kann. Das Charakteristikum des Etiketts ist die Resonanzfrequenz des amorphen Streifens, die neben der Länge des Etiketts auch von der Gleichfeldvormagnetisierung des parallel angeordneten magnetisch halbharten Streifens abhangt. Die Abstimmung des amorphen Streifens in seiner Lange auf den Fluß des aufmagnetisierten magnetisch halbharten Streifens bestimmt die Resonanzfrequenz des Etiketts im aktivierten Zustand. Diese Resonanzfrequenz muß sich deutlich von der Resonanzfrequenz des amorphen Streifens ohne oder mit geringer Gleichfeldvormagnetisierung unterscheiden, da diese Verschiebung der Resonanzfrequenz zur Deaktivierung der Etiketten benötigt wird. Die Einstellung einer ausreichend großen Verschiebung der Resonanzfrequenz zur Deaktivierung bewirkt aber eine nicht unerhebliche Empfindlichkeit der nachzuweisenden Resonanzfrequenz auf Variationen der Eigenschaften sowohl des amorphen Streifens als auch des magnetisch halbharten Streifens zur Vormagnetisierung (z.B. G. Herzer Patentanmeldung 95 E 9564 DE-1156).Due to the magnetostrictive coupling, those with the Vibration linked mechanical stresses a change in magnetization, which in the receiver coil a corresponding one AC voltage induced, which proves the label can be. The characteristic of the label is that Resonance frequency of the amorphous stripe, which in addition to the length of the label also from the DC field magnetization of the parallel magnetically semi-hard strip depends. The adjustment of the amorphous stripe in its length on the flow of the magnetized magnetically semi-hard The strip determines the resonance frequency of the label when activated Status. This resonance frequency must differ significantly the resonance frequency of the amorphous strip without or with little Distinguish DC field magnetization as this Shift of the resonance frequency to deactivate the labels is needed. The setting of a sufficiently large one Shifts the resonance frequency for deactivation but a not insignificant sensitivity of the demonstrable Resonance frequency on variations in the properties of both the amorphous stripe as well as the magnetically semi-hard stripe for premagnetization (e.g. G. Herzer patent application 95 E 9564 DE-1156).
Nach dem Stand der Technik werden amorphe Streifen und magnetisch halbharte Streifen getrennt hergestellt und eine Abstimmung der Eigenschaften wird für beide Streifen getrennt vorgenommen. Dementsprechend sind die Kriterien an die eingesetzten Streifen in ihren Eigenschaften und insbesondere der Abweichungen der Eigenschaften innerhalb von großen Lauflängen sehr kritisch und führen zu unbefriedigenden Ausbringungswerten im gesamten Prozeß.According to the prior art, amorphous strips and Magnetically semi-hard strips made separately and one Matching the properties is separated for both strips performed. Accordingly, the criteria applied to the Stripes in their properties and especially that Deviations in the properties within long run lengths very critical and lead to unsatisfactory output values in the whole process.
Nach dem Stand der Technik werden die Etiketten mit frei schwingenden amorphen Streifen dargestellt, so daß die Etikettenlänge genau der halben Wellenlänge der Resonanzfrequenz entspricht. Um zu wirtschaftlicheren Etiketten zu kommen, kann bei der vom System vorgegebenen Resonanzfrequenz nur in begrenztem Rahmen die Breite der Streifen reduziert werden.According to the state of the art, the labels are also free shown vibrating amorphous stripes, so the label length exactly half the wavelength of the resonance frequency equivalent. To get more economical labels, can only be in at the resonance frequency specified by the system limited frame the width of the strips can be reduced.
Die Erfindung betrifft die Herstellung und das Design von Etiketten zur Verwendung in Warensicherungs- und Identifizierungssystemen, bei denen der magnetoelastische Überwachungsstreifen einseitig fixiert ist und im System zu einer Schwingung mit einer 1/4-Wellenlänge der Resonanzfrequenz angeregt wird. Im weiteren betrifft die Erfindung den Abgleich der Eigenschaften des Etiketts während der Herstellung, so daß im Vergleich zum Stand der Technik eine deutliche Reduzierung der Anforderungen an die eingesetzten Streifen (vorzugsweise amorph und magnetisch halbhart) erreicht werden kann.The invention relates to the manufacture and design of Labels for use in security and identification systems, where the magnetoelastic surveillance strip is fixed on one side and vibrates in the system excited with a 1/4 wavelength of the resonance frequency becomes. The invention further relates to the comparison of the properties of the label during manufacture, so that in A significant reduction compared to the prior art the requirements for the strips used (preferably amorphous and magnetic semi-hard) can be achieved.
Folgende Ausführungsbeispiele beschreiben die erfindungsgemäßen Etiketten und deren Herstellung: The following exemplary embodiments describe the invention Labels and their manufacture:
Auf einen doppelseitig klebenden Streifen der Breite 12 mm wird ein magnetisch halbhartes Material der Breite 6 mm und der Dicke 62 µm aus SEMIVAC 90 aufgebracht, welches im aufmagnetisierten Zustand über seine Remanenz Br = 1,2 T einen Fluß von ca. 730 nWb in einen geschlossenen Magnetkreis einbringt. Auf dieses magnetisch halbharte SEMIVAC 90 wird ein amorpher Streifen aus VITROVAC 7250 (Fe-Co-Ni-Si-B-C) der Breite 6 mm und der Dicke 25 µm durch Punktschweißen befestigt, wobei in dem amorphen Streifen durch eine Wärmebehandlung im Feld eine lineare Magnetisierungskurve, eine definierte Magnetostriktion (hieraus folgen die magnetoelastischen Resonanzverhalten) und eine Querkrümmung eingestellte wurden. Die Punktschweißfixierungen bestehen aus einem oder mehreren Schweißpunkten nebeneinander, die jeweils in einem Abstand von exakt 23 mm den Amorphstreifen auf dem SEMIVAC 90 fixieren. An diesem Verbundstreifen wird anschließend neben der Punktschweißstelle ein beide Streifen erfassendes Loch ausgestanzt, so daß der Amorphstreifen nur noch einseitig durch eine oder mehrere Punktschweißstellen fixiert ist und eine frei schwingende Länge von 19 mm hat. In den folgenden Fertigungsschritten wird der magnetisch halbharte Streifen aufmagnetisiert und die Resonanzfrequenz des amorphen Streifens gemessen. In einem geschlossenen Regelkreis wird aus der gemessenen Resonanzfrequenz die genaue Positionierung der Stanzlöcher zu den folgenden Punktschweißstellen errechnet, so daß eine enge Tolerierung der Resonanzfrequenz (z.B. 58 kHz ± 100 Hz) auch mit größeren Standardabweichungen beider Streifen erzielbar ist, sofern die Variation der Eigenschaften über Längen eintritt, die im Vergleich zur Etikettenlänge (ca. 20 mm) lang ist. In einem Beispiel konnten Flußänderungen des magnetisch halbharten Streifens von ± 20 % ausgeregelt werden, während bei konventionellen Etiketten bereits ± 5 % zu Problemen in der Fertigung führen. Die Etikettenfertigung wird abgeschlossen durch das Aufsetzen eines Plastikprofilteils, welches das frei schwingende Ende des Amorphstreifens gegen mechanische Manipulationen in der Anwendung schützt.On a double-sided adhesive strips of width 12 mm is a magnetically semi-hard material of width 6 mm and the thickness of 62 microns from SEMIVAC 90 is applied, which in magnetized condition over its remanence B r = 1.2 T a flow of about 730 nWb in introduces a closed magnetic circuit. An amorphous strip made of VITROVAC 7250 (Fe-Co-Ni-Si-BC) with a width of 6 mm and a thickness of 25 µm is attached to this magnetically semi-hard SEMIVAC 90 by spot welding, with a linear magnetization curve in the amorphous strip through heat treatment in the field , a defined magnetostriction (from this follows the magnetoelastic resonance behavior) and a transverse curvature. The spot weld fixings consist of one or more weld spots next to each other, each of which fix the amorphous strip on the SEMIVAC 90 at a distance of exactly 23 mm. Next to the spot welding point, a hole is then punched out on this composite strip, so that the amorphous strip is only fixed on one side by one or more spot welding points and has a freely oscillating length of 19 mm. In the following manufacturing steps, the magnetically semi-hard strip is magnetized and the resonance frequency of the amorphous strip is measured. In a closed control loop, the exact positioning of the punch holes to the following spot welds is calculated from the measured resonance frequency, so that a close tolerance of the resonance frequency (e.g. 58 kHz ± 100 Hz) can also be achieved with larger standard deviations of both strips, provided that the variation of the properties is above Lengths occurs, which is long compared to the label length (approx. 20 mm). In one example, flux changes of the magnetic, semi-hard strip of ± 20% could be corrected, whereas with conventional labels, ± 5% already lead to problems in production. The label production is completed by placing a plastic profile part, which protects the free-swinging end of the amorphous strip against mechanical manipulations in the application.
Eine weitere Ausführung der erfindungsgemäßen Etiketten substituiert den Punktschweißvorgang durch das Aufbringen von quer aufgeklebten doppelseitig klebenden Streifen, die entsprechend den Punktschweißstellen die Fixierung des amorphen Streifens in gleichmäßigen Abständen sicherstellt. Der weitere Fertigungsprozeß verläuft analog.Another embodiment of the labels according to the invention substitutes the spot welding process by applying cross-glued double-sided adhesive strips, the corresponding the spot welds the fixation of the amorphous Stripes at regular intervals. The other The manufacturing process is analogous.
Claims (25)
- A magnetoelastically excitable label for a monitoring and identification system, with the label consisting of a magnetically semi-hard strip for deactivation and of a strip made from an amorphous alloy as a resonator,
characterised in that the resonator is mechanically fixed to one side
and in that the resonator has the length of ¼ wavelength of the resonance frequency. - A magnetoelastically excitable label according to Claim 1,
characterised in that the amorphous alloy is composed according to the following formula:a lies between 20 and 74b lies between 0 and 50c lies between 0 and 50provided that b + c > 5x lies between 0 and 10y lies between 10 and 20z lies between 0 and 5provided that the sum x + y + z lies between 12 and 24. - A magnetoelastically excitable label according to Claim 1,
characterised in that the amorphous alloy is composed according to the following formula:a lies between 20 and 74b lies between 0 and 25c lies between 0 and 5provided that b + c is > 5x lies between 0 and 10y lies between 10 and 20z lies between 0 and 5provided that the sum x + y + z lies between 12 and 24. - A magnetoelastically excitable label according to Claim 1,
characterised in that the amorphous alloy is composed according to the following formula:a lies between 20 and 74b lies between 0 and 15c lies between 0 and 50provided that b + c is > 5x lies between 0 and 10y lies between 10 and 20z lies between 0 and 5provided that the sum x + y + z lies between 12 and 24. - A magnetoelastically excitable label according to Claim 1,
characterised in that in the case of the strip made from the amorphous alloy a magnetisation loop was established by a heat treatment in the magnetic field, which is so flat that upon a change in the position of the label the change in the resonance frequency that is caused by the earth's field is less than 1 kHz
and in that the magnetisation loop on the other hand is set to be so steep that the difference in the resonance frequency without or with premagnetisation is greater than 1 kHz. - A magnetoelastically excitable label according to Claim 1,
characterised in that in the case of the strip made from the amorphous alloy a transverse curvature is set so that the contact between the amorphous strip and the magnetically semi-hard strip only has a linear character. - A magnetoelastically excitable label according to Claim 1,
characterised in that the freely oscillating length of the strip made from the amorphous ally lies between 15 and 25 mm, the width of the strip lies between 0.5 and 25 mm and the thickness lies between 15 and 40 µm. - A magnetoelastically excitable label according to Claim 1,
characterised in that the strip made from the amorphous ally has sufficient ductility so that it can be cut into lengths by punching operations without splitting. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip loses less than 5 % of its induction in the magnetised state by interference fields < 20 A/cm. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip loses less than 5 % of its induction in the magnetised state by interference fields < 10 A/cm. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip can be brought by fields of 400 A/cm at 5 % to the saturation induction. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip can be brought by fields of 200 A/cm at 5 % to the saturation induction. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip can be brought by fields of 50 A/cm at 5 % to the saturation induction. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip has coercive forces of between 10 A/cm and 60 A/cm. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip has coercive forces of between 10 A/cm and 30 A/cm. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip has a remanence Br > 1.0 T. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip has a residual magnetism Br > 1.2 T. - A magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip has thicknesses of between 25 µm and 100 µm. - A magnetoelastically excitable label according to Claim 1,
characterised in that the widths of the strip consisting of the amorphous alloy and the magnetically semi-hard strip do not vary by more than 20 % from one another. - A process for the manufacture of a magnetoelastically excitable label according to Claim 1,
characterised in that the magnetically semi-hard strip and the amorphous strip are mechanically fixed to one another at uniform distances and the resonator is produced by stamping through both strips in the subsequent step. - A process according to Claim 20,
characterised in that the magnetically semi-hard strip is fixed in the label via an adhesive layer. - A process according to Claim 20,
characterised in that the fixing of the resonator is performed by one or more spot welds. - A process according to Claim 20,
characterised in that the fixing of the resonator is performed by an adhesive layer. - A process according to Claim 20,
characterised in that the length of the resonator is controlled during stamping by the measurement of the resonance frequencies of the preceding labels. - A process according to Claim 20,
characterised in that a plastic profile, which ensures a free longitudinal oscillation of the resonator, is fixed over the resonator.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19651525A DE19651525A1 (en) | 1996-12-11 | 1996-12-11 | Labels in acustomagnetic anti-theft systems |
| DE19651525 | 1996-12-12 | ||
| PCT/DE1997/002893 WO1998026390A1 (en) | 1996-12-11 | 1997-12-11 | Label for use in acousto-magnetic anti-theft devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0944885A1 EP0944885A1 (en) | 1999-09-29 |
| EP0944885B1 true EP0944885B1 (en) | 2002-09-18 |
Family
ID=7814384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97952717A Expired - Lifetime EP0944885B1 (en) | 1996-12-11 | 1997-12-11 | Label for use in acousto-magnetic anti-theft devices |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6171694B1 (en) |
| EP (1) | EP0944885B1 (en) |
| JP (1) | JP2001506025A (en) |
| DE (2) | DE19651525A1 (en) |
| WO (1) | WO1998026390A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19953334C2 (en) | 1999-11-05 | 2002-05-08 | Siemens Ag | Remote readable identification tag and method for operating several such identification tags |
| WO2010082195A1 (en) | 2009-01-13 | 2010-07-22 | Vladimir Manov | Magnetomechanical markers and magnetostrictive amorphous element for use therein |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1954575B2 (en) | 1969-10-30 | 1972-02-17 | Fa. Friedr. Krollmann, 5990 Altena | FORMING PRESS WITH AT LEAST THREE STAR-SHAPED PRISMATIC PRISM JAWS IN PARTICULAR FOR FINGING PIPES |
| JPS58139408A (en) | 1982-02-15 | 1983-08-18 | Hitachi Metals Ltd | Wound iron core |
| JPH04500985A (en) | 1988-09-26 | 1992-02-20 | アライド―シグナル・インコーポレーテッド | Metallic glass alloys for mechanical resonance target monitoring systems |
| DE9412456U1 (en) | 1994-08-02 | 1994-10-27 | Vacuumschmelze Gmbh, 63450 Hanau | Amorphous alloy with high magnetostriction and at the same time high induced anisotropy |
| US5539380A (en) | 1995-04-13 | 1996-07-23 | Alliedsignal Inc. | Metallic glass alloys for mechanically resonant marker surveillance systems |
| DE19545755A1 (en) | 1995-12-07 | 1997-06-12 | Vacuumschmelze Gmbh | Use of an amorphous alloy for magnetoelastic excitable labels in monitoring systems based on mechanical resonance |
-
1996
- 1996-12-11 DE DE19651525A patent/DE19651525A1/en not_active Withdrawn
-
1997
- 1997-12-11 WO PCT/DE1997/002893 patent/WO1998026390A1/en active IP Right Grant
- 1997-12-11 JP JP52609398A patent/JP2001506025A/en active Pending
- 1997-12-11 US US09/319,760 patent/US6171694B1/en not_active Expired - Lifetime
- 1997-12-11 DE DE59708282T patent/DE59708282D1/en not_active Expired - Fee Related
- 1997-12-11 EP EP97952717A patent/EP0944885B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US6171694B1 (en) | 2001-01-09 |
| WO1998026390A1 (en) | 1998-06-18 |
| JP2001506025A (en) | 2001-05-08 |
| DE19651525A1 (en) | 1998-06-18 |
| EP0944885A1 (en) | 1999-09-29 |
| DE59708282D1 (en) | 2002-10-24 |
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