EP0755036A1 - Deaktivierbares Resonanzetikett und Verfahren zu seiner Herstellung - Google Patents

Deaktivierbares Resonanzetikett und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0755036A1
EP0755036A1 EP96111423A EP96111423A EP0755036A1 EP 0755036 A1 EP0755036 A1 EP 0755036A1 EP 96111423 A EP96111423 A EP 96111423A EP 96111423 A EP96111423 A EP 96111423A EP 0755036 A1 EP0755036 A1 EP 0755036A1
Authority
EP
European Patent Office
Prior art keywords
turns
conductive medium
substrate
additional conductive
spiral conductor
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.)
Withdrawn
Application number
EP96111423A
Other languages
English (en)
French (fr)
Inventor
George F. Andrews
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
Esselte 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
Application filed by Esselte Meto International GmbH filed Critical Esselte Meto International GmbH
Publication of EP0755036A1 publication Critical patent/EP0755036A1/de
Withdrawn legal-status Critical Current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
    • 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 present invention generally relates to deactivatable tags that can be used with electronic article surveillance systems, as well as methods for making such tags.
  • U.S. Patents disclose conventional deactivatable tags and conventional methods of making the same. Among these are: U.S. Patent No. 5,367,290 to Kind et al.; No. 5,341,125 to Plonsky et al.; No. 5,184,111 to Pichl; No. 5,172,461 to Pichl; No. 5,006,856 to Benge et al.; No. 4,910,499 to Benge et al.; No. 4,876,555 to Jorgensen; No. 4,835,524 to Lamond et al.; No. 4,818,312 to Benge; No. 4,567,473 to Lichtblau; No. 4,498,076 to Lichtblau; No. 4,778,542 to Benge et al.; No. 4,717,438 to Benge et al.; and 4,694,283 to Reeb.
  • a deactivatable tag which essentially includes a supplemental conductive medium disposed on a conductor, the supplemental conductive medium preferably being different from the conductive material of the conductor proper, as well as a medium via which material from the supplemental conductive medium can migrate from the turn of the conductor on which the supplemental conductive medium is disposed to an adjacent, parallel turn of the conductor.
  • the present invention also contemplates, in accordance with at least one preferred embodiment, a method of making a deactivatable tag such as that described immediately above.
  • invention includes “inventions”, that is, the plural of "invention”.
  • invention the Applicant does not in any way admit that the present application does not include more than one patentably and non-obviously distinct invention, and maintains that this application may include more than one patentably and non-obviously distinct invention.
  • the Applicant hereby asserts that the disclosure of this application may include more than one invention, and, in the event that there is more than one invention, that these inventions may be patentable and non-obvious one with respect to the other.
  • one aspect of the invention resides broadly in a method of making a deactivatable tag for use in an electronic article surveillance system, the tag comprising: a resonant circuit responsive to receipt of a deactivation signal; the resonant circuit including a spiral conductor, the spiral conductor having at least two turns, the at least two turns being spaced apart from one another, each of the at least two turns comprising a conductive medium; an additional conductive medium being disposed on a first of the at least two turns; and means for promoting, in response to a deactivation signal, migration of at least a portion of the additional conductive medium from the first of the at least two turns to a second, adjacent one of the at least two turns, to conductively connect the first and second turns and deactivate the tag; the method comprising the steps of:
  • a deactivatable tag for use in an electronic article surveillance system, the tag comprising: a resonant circuit responsive to receipt of a deactivation signal; the resonant circuit including a spiral conductor, the spiral conductor having at least two turns, the at least two turns being spaced apart from one another, each of the at least two turns comprising a conductive medium; an additional conductive medium being disposed on a first of the at least two turns; and means for promoting, in response to a deactivation signal, migration of at least a portion of the additional conductive medium from the first of the at least two turns to a second, adjacent one of the at least two turns, to conductively connect the first and second turns and deactivate the tag.
  • FIG 1 is an exploded perspective view of a conventional tag 19.
  • the tag 19 is shown to include a sheet 20T having pressure sensitive adhesive 21 and 22.
  • a conductor, indicated generally at 25, includes a spiral conductor 26 having several turns.
  • the conductor 26 can be of essentially the same width throughout its length except for a connector bar 27 at the outer end portion of the conductor spiral 26.
  • a conductor, generally indicated at 30, includes a spiral conductor 31 having several turns.
  • This conductor spiral 31 may, in several aspects, be configured similarly to conductor spiral 25.
  • the conductor spirals 25 and 30 can be aligned in face-to-face relationship, save for portions 33 which are not face-to-face with the conductor 26 and portions 35 which are not face-to-face with the conductor 31.
  • connector bars 27 and 32 can be electrically connected, such as by a staking 90 (see Figure 1b).
  • Figure 1b generally illustrates a conventional method for making the tag 19 shown in Figure 1a.
  • a further description of this conventional method may be found in U.S. Patent Nos. 4,778,552 and 5,006,856 to Benge et al., particularly with reference to Figure 3 in both patents.
  • Figures 1c-1h variously illustrate successive stages in the formation of a sheet of resonant tag conductors. Similarly to Figure 1b, further details regarding the tag sheets illustrates in Figures 1c-1h may be found in U.S. Patent Nos. 4,778,552 and 5,006,856 to Benge et al., particularly with reference to Figures 4-9 in both patents.
  • Figure 2 may be considered to be a schematic elevational view of a resonant tag 150 according to a preferred embodiment of the present invention. Accordingly, only one side of the tag 150 is actually shown.
  • a given conductor 200 will preferably include a plurality of turns 202, with each of these turns 202, for example, essentially being disposed parallel with respect to one another and spaced apart from one another.
  • Other configurations of a conductor known to those of ordinary skill in the art could also likely be used in alternative embodiments of the present invention.
  • a selected one of the turns 202a may preferably have disposed thereupon a supplemental conductive medium 204.
  • This supplemental conductive medium 204 will preferably be of a different composition than the conductive medium of the corresponding turn 202a.
  • this supplemental conductive medium 204 will be used in the deactivation of the tag.
  • the supplemental conductive medium 204 will preferably be configured such that, upon the tag generally reaching a predetermined or given voltage, such as a voltage threshold, a quantity of material from the supplemental conductive medium 204 will be urged to migrate, within a given period of time, towards an adjacent turn 202b of conductor 200.
  • a medium 206 sufficient for promoting the migration of material from supplemental conductive medium 204 from the initial turn 202a to neighboring turn 202b.
  • this medium 206 could preferably include a composition containing tin ions. If, for example, the supplemental conductive medium 204 includes or consists of copper, it is believed that tin ions would be particularly suitable for promoting the migration of material from the supplemental conductive medium away from the initial turn 202a.
  • Figure 3 illustrates what may be considered or believed to be an intermediate stage of migration of material from supplemental conductive medium 204, between turns 202a and 202b. Particularly, Figure 3 illustrates what is believed to be the formation of a partial "bridge" 204a. At this stage, some migration of material from supplemental conductive medium 204, from turn 202a, has begun, but has not yet reached neighboring turn 202b, in order to establish a complete "bridge" sufficient for creating a short circuit between turns 202a and 202b, result in deactivation of the tag 150. It should be pointed out that the exact mechanism of migration may not be fully understood at the present time, so that the mechanism illustrated in Figure 3 is, in many respects, a theory to assist in the explanation of the phenomenon taking place.
  • Figure 4 shows a more advanced stage of the aforementioned migration of material from supplemental conductive medium 204, in the creation of a complete "bridge" 204b between turns 202a and 202b. Since material from the supplemental conductive medium 204 now extends from turn 202a to turn 202b in the form of a complete "bridge" 204b, a short circuit will be created between turns 202a and 202b, and the tag will be deactivated.
  • the supplemental metallic material 204 will preferably have properties that will allow the same to break down at a lower voltage than would the constituent material of the turns 202a,b proper.
  • the supplemental metallic material 204 can include a copper-based material, with the turns 202a,b being made of aluminum.
  • the substrate 206 will simultaneously serve as the dielectric between the two conductors of the tag.
  • the supplemental conductive medium discussed herein can be added to either or both of the conductors found in an All-Tag tag, and the dielectric found in an All-Tag tag can be prepared in the manner described herein, with respect to providing the same with a capability to promote the migration of conductive material thereacross.
  • a particularly effective material for use as the supplemental conductive medium 204 is a "599-Y1002 copper-conductive coating" manufactured by the Spraylat Corporation, 716 S. Columbus Ave., Mt. Vernon, NY 10550.
  • a copper-based coating will be applied to the turn 202a with an appropriate binder or solvent.
  • a low-viscosity fluid including stannous chloride and hydrochloric acid, essentially by wetting the polyethylene base.
  • the aforementioned low-viscosity fluid which may be termed a "sensitization mixture”
  • a sensitization mixture may be composed of or made from the following: 480 ml deionized water; 2 ml hydrochloric acid; 1.25 grams stannous chloride; and 3 grams of tin filings.
  • the sensitization process whether done manually in a laboratory or automatically in a mass-production arrangement, can include wetting the substrate with a mixture such as that described, and with a dwell time of preferably about 2 minutes. This may then be followed by a deionized water rinse and subsequent drying. This will also be discussed in more detail herebelow, with reference to Figure 5.
  • the supplemental conductive medium 204 may be applied, dried and sealed.
  • any suitable sealant may be utilized for the purpose of sealing.
  • sealants that may be utilized, and that have been used in making a tag according to the present invention are, for example, Norland Optical Adhesive #60 and Norland Optical Adhesive #81, both available from Norland Products Inc., New Brunswick, NJ 08902.
  • Norland Optical Adhesive #60 and Norland Optical Adhesive #81 both available from Norland Products Inc., New Brunswick, NJ 08902.
  • clear nail polish as a sealant
  • any commercially available, conventional clear nail polish is suitable for this purpose; for example, it is possible to use the well-known clear nail polishes manufactured by Revlon, Maybelline and L'Oreal.
  • Figure 5 illustrates, in schematic form, an arrangement that may be utilized to form a finished substrate 206 in accordance with at least one preferred embodiment of the present invention.
  • substrate 206 can preferably serve as the dielectric between two opposing conductors of a completed tag 150.
  • a non-conductive sheet of material 300 may preferably be fed into a coating unit 302, in which unit the sheet 300 may be coated with a "sensitization mixture" similar to that discussed above.
  • the sheet 300 may remain in the coating unit for a given dwell time, such as about 2 minutes; however, longer or shorter dwell times may be feasible.
  • the now-coated sheet 300 may be fed into a rinsing unit 304, to be rinsed with an appropriate rinsing agent, such as deionized water.
  • an appropriate rinsing agent such as deionized water.
  • the sheet 300 may then preferably be fed into a suitable drying unit 306, such as a warm-air drying unit, for drying.
  • sheet 300 will essentially have been transformed into a substrate base material 300a, having the properties alluded to heretofore with regard to a capability for promoting migration of conductive material thereacross.
  • a carrying medium 400 which may possibly, but not necessarily, correspond to the substrate base material 300a described heretofore with respect to Figure 5, and having already imprinted thereupon an array of conductors 200 (not shown), may preferably be fed to an application unit 402.
  • the aforementioned supplemental conductive medium 204 may be applied to one of the turns of a selected plurality of individual conductor coils (see Figure 2). If it is to be assumed that the supplemental conductive medium being applied is a metallic medium, such as copper or a copper-based composition, it is conceivable to apply the same as an ink to one of the coil turns.
  • the carrier 400 may then preferably be fed into a suitable drying unit 404, such as a warm-air drying unit.
  • a suitable drying unit 404 such as a warm-air drying unit.
  • the carrier 400 with the array of conductive coils disposed thereupon and the supplemental conductive medium having been applied and dried thereupon, may preferably be fed to a sealing unit 406.
  • the sealing unit 406 may be configured 50 as to apply a lacquer-type solution to the now-applied and dried supplemental conductive medium on each conductor 200 (not shown) to which the supplemental conductive medium has been applied.
  • the carrier 400 may then preferably exit the sealing unit, possibly for further drying, or at least for further processing in order to form a complete deactivatable resonant tag.
  • Figure 7 shows what may be considered to be a "microscopic" or up-close view of a section of a tag according to the present invention, before being deactivated.
  • Figure 8 shows what may be considered to be a "microscopic" or up-close view of a section of a tag according to the present invention that has been deactivated.
  • the actual deactivation path can be considered to have taken place in the area marked with a circle.
  • the supplemental conductive medium can be considered to have been applied generally to the area marked with a rectangle.
  • Figure 9 illustrates a somewhat more remote view of the deactivated tag illustrated in Figure 8. Within the rectangle shown in Figure 9, it is still possible to see the conductive path which has been formed between two coil turns.
  • the supplemental conductive coating 204 described heretofore may be applied to as great an area of a given turn of a conductor coil as is deemed appropriate, as well as to any of the turns, as deemed appropriate.
  • the areas of coverage of the supplemental conductive medium illustrated or alluded to in Figures 2-9 as well as the exact coil turn on which it is positioned, is not to be limited by the examples set forth heretofore.
  • materials other than copper or copper-based materials may be used as the supplemental conductive medium 204, which would adhere to at least a portion of a conductor turn.
  • a substrate 206 in a manner different than any manner described herein; for example, different types of ions other than tin may be utilized, and the ions may be disposed on the substrate 206 in patterns or manners different from any described herein.

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  • 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)
EP96111423A 1995-07-20 1996-07-16 Deaktivierbares Resonanzetikett und Verfahren zu seiner Herstellung Withdrawn EP0755036A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US504850 1990-04-05
US50485095A 1995-07-20 1995-07-20

Publications (1)

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EP0755036A1 true EP0755036A1 (de) 1997-01-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705723A1 (de) * 1996-08-06 1998-02-12 Esselte Meto Int Gmbh Sicherungselement für die elektronische Artikelsicherung
US6262663B1 (en) 1996-08-06 2001-07-17 Richard Altwasser Electronic anti-theft element
WO2003091962A1 (en) * 2002-04-25 2003-11-06 Upm Rafsec Oy A method for maufacturing a product sensor, and a product sensor
WO2006048663A1 (en) * 2004-11-05 2006-05-11 Qinetiq Limited Detunable rf tags

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386007A (en) * 1965-07-22 1968-05-28 Sprague Electric Co Multi-shot voltage sensitive switch for protecting components or circuits subject tovariable voltage conditions
US3836883A (en) * 1971-12-08 1974-09-17 Hokuriku Elect Ind Fuse and resistor device
US4818312A (en) * 1986-09-29 1989-04-04 Monarch Marking Systems, Inc. Method of making electronic tags
WO1991009387A1 (de) * 1989-12-20 1991-06-27 Actron Entwicklungs Ag Deaktivierbare resonanzetikette
EP0472073A2 (de) * 1990-08-17 1992-02-26 Kobe Properties Limited Verfahren zur Herstellung von elektrischen Schwingkreisen, insbesondere Resonanz-Etiketten
GB2247594A (en) * 1987-10-28 1992-03-04 Monarch Marking Systems Inc Tags for use in electronic article surveillance systems.
WO1994012957A1 (en) * 1992-11-27 1994-06-09 Dutch A&A Trading B.V. Detection tag
US5510770A (en) * 1994-03-30 1996-04-23 Checkpoint Systems, Inc. Surface deactivateable tag

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386007A (en) * 1965-07-22 1968-05-28 Sprague Electric Co Multi-shot voltage sensitive switch for protecting components or circuits subject tovariable voltage conditions
US3836883A (en) * 1971-12-08 1974-09-17 Hokuriku Elect Ind Fuse and resistor device
US4818312A (en) * 1986-09-29 1989-04-04 Monarch Marking Systems, Inc. Method of making electronic tags
GB2247594A (en) * 1987-10-28 1992-03-04 Monarch Marking Systems Inc Tags for use in electronic article surveillance systems.
WO1991009387A1 (de) * 1989-12-20 1991-06-27 Actron Entwicklungs Ag Deaktivierbare resonanzetikette
US5367290A (en) * 1989-12-20 1994-11-22 Actron Entwicklungs Ag Deactivatable resonance label
EP0472073A2 (de) * 1990-08-17 1992-02-26 Kobe Properties Limited Verfahren zur Herstellung von elektrischen Schwingkreisen, insbesondere Resonanz-Etiketten
WO1994012957A1 (en) * 1992-11-27 1994-06-09 Dutch A&A Trading B.V. Detection tag
US5510770A (en) * 1994-03-30 1996-04-23 Checkpoint Systems, Inc. Surface deactivateable tag

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705723A1 (de) * 1996-08-06 1998-02-12 Esselte Meto Int Gmbh Sicherungselement für die elektronische Artikelsicherung
US6262663B1 (en) 1996-08-06 2001-07-17 Richard Altwasser Electronic anti-theft element
WO2003091962A1 (en) * 2002-04-25 2003-11-06 Upm Rafsec Oy A method for maufacturing a product sensor, and a product sensor
WO2006048663A1 (en) * 2004-11-05 2006-05-11 Qinetiq Limited Detunable rf tags

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