EP0935767B1 - Sicherungselement für die elektronische artikelüberwachung - Google Patents

Sicherungselement für die elektronische artikelüberwachung Download PDF

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Publication number
EP0935767B1
EP0935767B1 EP97948832A EP97948832A EP0935767B1 EP 0935767 B1 EP0935767 B1 EP 0935767B1 EP 97948832 A EP97948832 A EP 97948832A EP 97948832 A EP97948832 A EP 97948832A EP 0935767 B1 EP0935767 B1 EP 0935767B1
Authority
EP
European Patent Office
Prior art keywords
conductor strips
security element
area
conductor tracks
layers
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
Application number
EP97948832A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0935767A1 (de
Inventor
Richard Altwasser
Peter Lendering
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.)
Meto International GmbH
Original Assignee
Meto International GmbH
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
Priority claimed from DE19708180A external-priority patent/DE19708180A1/de
Application filed by Meto International GmbH filed Critical Meto International GmbH
Publication of EP0935767A1 publication Critical patent/EP0935767A1/de
Application granted granted Critical
Publication of EP0935767B1 publication Critical patent/EP0935767B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G08B13/2414—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 inductive tags
    • G08B13/242—Tag deactivation
    • 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

Definitions

  • the invention relates to a securing element of the type specified in the preamble of claim 1.
  • a securing element is known from US-A-4,792,790.
  • Securing elements in the form of so-called resonant circuit labels or - Followers are increasingly used in prevention and detection of theft used in department stores and warehouses.
  • the surveillance goes as follows: the resonant circuits are replaced by a magnetic one Alternating field in the query zone in the entrance and exit area of the device to be monitored to send a characteristic Detection signal excited. Once the surveillance system receives the detection signal registered, an alarm is triggered.
  • the securing elements are deactivated once the secured goods are properly purchased from a customer has been.
  • the method of supplying one has proven itself here correspondingly high energy pulse, a short circuit between the two layers to produce conductor tracks through the dielectric layer.
  • each of the layers of conductor tracks consists of one Variety of turns.
  • the two layers of conductor tracks are over one dielectric film connected together, the has a substantially constant thickness over the entire surface of the layers.
  • the securing element is also deactivated here by the feed a sufficiently high energy pulse.
  • a short circuit is preferred several places of the securing element and is - statistically seen - evenly over the entire area of the layers of the overlapping Distributed conductor tracks.
  • US-A-5 241 299 describes a resonance frequency fuse element consisting of a coil and arranged on both sides of a continuous electrical film Capacitor plates.
  • This known securing element has two overlapping ones Layers of rectangular conductor tracks.
  • US-A-4 792 790 describes a securing element in which the application of a deactivation signal is not provided, so that no reference to there is the problem of reactivating a fuse element.
  • US-A-4 818 312 describes a method of making electronic labels.
  • this method uses two coils of a label using laser energy welded together in a selected area. Is between the two coils as in the case of US-A-5 241 299, a continuous dielectric sheet material arranged that affects the flexibility of the label and special measures for the Deactivation of the label requires.
  • the object of the invention is to propose a securing element, which reduces the risk of reactivation after deactivation.
  • the deactivation takes place via one of the conductor tracks interconnecting dielectric adhesive layer, specifically on the production-related Weaknesses of the same.
  • the interconnects are only connected to each other by the dielectric adhesive layer, it is So, in contrast to the prior art, not yet additional between the conductor tracks a dielectric film or the like is present.
  • the strength of the two layers in the area the overlapping conductor tracks therefore requires that in the event of mechanical stress a bend in the traces occurs in areas that are in direct extension to the conductor-free areas between the turns of the conductor tracks. This In contrast to the prior art, there is therefore no bending between the conductor tracks additionally affects existing foils.
  • both layers have essentially the same dimensions, one of the layers with respect to the another position is folded and turned by 180 °. Target bending points are more pronounced through this configuration.
  • the two conductor tracks are identical, but in opposite directions Directions wrapped.
  • the securing element according to the invention also offers additional advantages. Due to the relatively large width of the conductor tracks and the small The number of turns of conductor tracks can be used to manufacture the material simplify and is therefore cheaper. There is an additional advantage from the fact that the larger width of the conductor tracks has a reduced impedance and thus a higher Q factor of the resonant circuit causes Da a higher Q factor means that the sharpness of the resonance signal is better According to the invention, the detection rate can also be pronounced improve.
  • the portion of the surface of the conductor tracks, which are bent in the case of mechanical stress, maximum 10% the total area of the conductor tracks is as stated above, is one Reactivation is all the more improbable, the smaller the bending area of the two layers of conductor tracks is.
  • a cost-effective design that facilitates manufacturing Fuse element according to the invention provides that the conductor tracks Aluminum, especially one with a dielectric coating provided aluminum foil, are manufactured.
  • a favorable embodiment of the fuse element according to the invention provides that the two conductor tracks are designed in this way and are electrically connected to one another in a region in which the voltage existing between the conductor tracks is zero or at least reaches a minimum.
  • the securing elements usually carry a paper label which is printed with the corresponding information for the purpose of price and or product labeling in a printer, for example a laser printer.
  • the electrical connection of the conductor tracks ensures that the fuse elements are not changed in their physical properties by the direct voltages occurring in the laser printer. In particular, this configuration prevents the securing elements from being inadvertently deactivated during printing.
  • the two conductor tracks exactly at this optimal point connect. It is therefore provided in an alternative embodiment that the two conductor tracks have several electrical connections in the area which So the area has a larger extent. The conductor tracks are therefore one longer distance shorted, creating a safe electrical connection is created with little resistance between the conductor tracks.
  • the two conductor tracks are advantageously in one of their end regions interconnected, what is seen in terms of circuitry Series connection of the inductances of the two conductor tracks results.
  • the electrical connection between the two conductor tracks can be produced inexpensively by pressurizing one or more times, for example by means of a stamping device, the stamping device possibly still being able to be heated.
  • Another way of achieving a reliable electrical connection between the two spiral conductor tracks is to punch holes through the two opposite conductor tracks.
  • An alternative proposes a so-called crimping process, in which a toothed, heatable stamp is pressed onto the two layers to be connected.
  • the dielectric layer is removed in the corresponding area or areas by mechanical or chemical means.
  • Securing element this is used at the same time to identify the secured Article used.
  • an integrated circuit is provided, which with the Fuse element is electrically connected. It has proven to be very cheap highlighted when the electrically conductive connection through one or repeated pressurization with or without heat or through Punching is reached.
  • everyone is already aforementioned options for contacting the two conductor tracks also for contacting between integrated circuit and fuse element applicable.
  • a data carrier with an integrated circuit is already out EP 0 682 321 A2.
  • Fig. 1 shows an exploded view of the invention Fuse element 1.
  • the fuse element 1 consists of a lower layer 2 of conductor tracks 4 and an upper layer 3 of conductor tracks 5. Both layers 2, 3 are almost identical in terms of their dimensions, but they are in the already described previously twisted to each other. It is also possible that the width of the two layers (2, 3) of conductor tracks (4, 5) deviates from each other.
  • the securing element 1 As shown in Fig. 1 by hatching, the securing element 1 according to the invention a bending under mechanical Stress preferred in areas 21, 31 which are in direct extension to the areas of the fuse element 1 which are free of conductor tracks. With that by bending the securing element only the hatched areas 21 and 31 of the Layers 2, 3 influenced by conductor tracks 4, 5. The sum of the corresponding Area areas is small compared to the total area of the overlapping Conductor tracks 4, 5. Considering that the probability of deactivation over the total area of the overlapping layers 2, 3 of the conductor tracks 4.5 is the same size is, only a small fraction of securing elements 1 becomes one Short circuit in the hatched areas 21, 31. Only at this minor Fraction of securing elements 1 from now on there is still the risk of Reactivation under mechanical stress.
  • Fig. 2 illustrates the different the voltage potentials in different areas of the two overlapping conductor tracks 4; 5 about the length of which occurs during electromagnetic induction.
  • the dielectric layer 9 is not uniformly thick or has defects, e.g. Contains air bubbles. Both irregularities are the result of Manufacturing defects. Such manufacturing defects can local vulnerabilities and due to air pockets, even holes in the dielectric layer 9 cause. The dielectric layer 9 breaks when the Deactivation signal therefore also at these local weak spots together, although here the voltage potential is sometimes much lower than in the End regions of the two conductor tracks 4; 5th
  • FIG. 3 shows an advantageous first embodiment of the invention Fuse element 1 in plan view.
  • the lower conductor track 5 is only partially visible and drawn in dashed lines.
  • the two conductor tracks 4; 5 electrically connected to one another in a region 7 which is designed in a punctiform manner.
  • the voltage potential is zero or at least reaches a minimum. This leaves effectively avoid that the securing element 1 when creating a external DC voltage, e.g. when printing on the Securing element 1 attached paper labels in a printer, occurs in particular in a laser printer, is inadvertently deactivated.
  • the fuse element 1 described in FIG. 3 only delivers one excellent detection rate as well as best deactivation results if the electrical connection lies exactly in the area 7 in which the Voltage potential between the two conductor tracks 4; 5 becomes zero. At a Such security element 1 are consequently the highest demands on the To provide manufacturing quality.
  • the electrical connection is only a little bit outside the optimal range 7, the Q factor and the deteriorate Resonance amplitude of the security element 1 - ultimately the detection rate the securing element 1.
  • the advantageous second embodiment of the invention shown in FIG. 4 Fuse element 1 eliminates this disadvantage.
  • the punctiform electrical connection between the two conductor tracks 4; 5 by several electrical connections located along area 8 are replaced.
  • This electrical connection is therefore much safer than the connection in a punctiform area 7 and is very unlikely to pass through mechanical stress on the securing element 1 is broken.
  • the electrical connection leads to a Series connection of inductors of upper and lower spiral Conductor 4, 5.
  • the fuse element 1 shown in this example has only one turn by the way. This is designed so wide that target bending points lie in areas 21 ', 31' in which only one of the conductor tracks 4; 5 runs.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Fuses (AREA)
  • Emergency Alarm Devices (AREA)
  • Road Signs Or Road Markings (AREA)
  • Laminated Bodies (AREA)
EP97948832A 1996-11-04 1997-10-29 Sicherungselement für die elektronische artikelüberwachung Expired - Lifetime EP0935767B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19645330 1996-11-04
DE19645330 1996-11-04
DE19708180A DE19708180A1 (de) 1996-11-04 1997-02-28 Sicherungselement für die elektronische Artikelüberwachung
DE19708180 1997-02-28
PCT/EP1997/005975 WO1998020371A1 (de) 1996-11-04 1997-10-29 Sicherungselement für die elektronische artikelüberwachung

Publications (2)

Publication Number Publication Date
EP0935767A1 EP0935767A1 (de) 1999-08-18
EP0935767B1 true EP0935767B1 (de) 2002-04-03

Family

ID=26030952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97948832A Expired - Lifetime EP0935767B1 (de) 1996-11-04 1997-10-29 Sicherungselement für die elektronische artikelüberwachung

Country Status (10)

Country Link
US (1) US6414596B1 (no)
EP (1) EP0935767B1 (no)
AT (1) ATE215705T1 (no)
AU (1) AU723358B2 (no)
DE (1) DE59706903D1 (no)
ES (1) ES2174311T3 (no)
NO (1) NO992129L (no)
NZ (1) NZ334506A (no)
PT (1) PT935767E (no)
WO (1) WO1998020371A1 (no)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19857583A1 (de) * 1998-12-14 2000-06-15 Meto International Gmbh Sicherungselement für die elektronische Artikelsicherung und Verfahren zur Herstellung eines Sicherungselementes
DE19951561A1 (de) * 1999-10-27 2001-05-03 Meto International Gmbh Sicherungselement für die elektronischen Artikelsicherung
DE10145750A1 (de) * 2001-09-17 2003-04-24 Infineon Technologies Ag Verfahren zur Herstellung einer Metallschicht auf einem Trägerkörper und Trägerkörper mit einer Metallschicht

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3143208C2 (de) * 1981-10-30 1984-07-05 Max-E. Dipl.-Ing. 7320 Göppingen Reeb Identifizierungsanordnung in Form eines an einem Gegenstand anbringbaren etikettartigen Streifens und Verfahren zu deren Herstellung
DE3221500A1 (de) * 1982-06-07 1983-12-08 Max-E. Dipl.-Ing. 7320 Göppingen Reeb Identifizierungsanordnung in form eines an einem gegenstand anbringbaren gebildes und verfahren zur herstellung
US4745401A (en) * 1985-09-09 1988-05-17 Minnesota Mining And Manufacturing Company RF reactivatable marker for electronic article surveillance system
US4717438A (en) * 1986-09-29 1988-01-05 Monarch Marking Systems, Inc. Method of making tags
US4778552A (en) * 1986-09-29 1988-10-18 Monarch Marking Systems, Inc. Alarm tag and method of making and deactivating it
US4846922A (en) * 1986-09-29 1989-07-11 Monarch Marking Systems, Inc. Method of making deactivatable tags
US5059950A (en) * 1990-09-04 1991-10-22 Monarch Marking Systems, Inc. Deactivatable electronic article surveillance tags, tag webs and method of making tag webs
US5142270A (en) * 1991-05-22 1992-08-25 Checkpoint Systems Inc. Stabilized resonant tag circuit and deactivator
US5241299A (en) 1991-05-22 1993-08-31 Checkpoint Systems, Inc. Stabilized resonant tag circuit
ATE440480T1 (de) * 1993-12-30 2009-09-15 Miyake Kk Verbundfolie mit schaltungsfírmiger metallfolie oder dergleichen und verfahren zur herstellung
US5751256A (en) * 1994-03-04 1998-05-12 Flexcon Company Inc. Resonant tag labels and method of making same
US5781110A (en) * 1996-05-01 1998-07-14 James River Paper Company, Inc. Electronic article surveillance tag product and method of manufacturing same
TW350054B (en) * 1996-11-29 1999-01-11 Mitsubishi Materials Corp Burglarproof label

Also Published As

Publication number Publication date
NO992129D0 (no) 1999-05-03
DE59706903D1 (de) 2002-05-08
ATE215705T1 (de) 2002-04-15
ES2174311T3 (es) 2002-11-01
NZ334506A (en) 2001-02-23
EP0935767A1 (de) 1999-08-18
WO1998020371A1 (de) 1998-05-14
AU723358B2 (en) 2000-08-24
AU7003098A (en) 1998-05-29
NO992129L (no) 1999-05-03
PT935767E (pt) 2002-09-30
US6414596B1 (en) 2002-07-02

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