US5142270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized resonant tag circuit and deactivator
Assignee: Checkpoint Systems Inc
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Filing: 1991-05-22
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Granted: 1992-08-25
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Expires: 2011-05-22
Abstract
Abstract A stabilized resonant tag circuit and deactivator therefore for use as an electronic article surveillance tag. The tag has a flexible substantially planar dielectric substrate having conductors positioned on either side, at least one of the conductors including an inductor. The tag is stabilized by a flexible, substantially planar, tear-resistant, polymeric film adhered to and covering one of the conductors and the substrate. The film provides a vapor barrier which minimizes the effects of body detuning on the circuit and promotes the secured integrity of the tag. Another embodiment of the present invention is a stabilized deactivatable resonant tag circuit, further including a deactivator for deactivating the tag in response to an electromagnetic field of sufficient energy to destroy the resonant properties of the circuit, the deactivator being an indented portion of at least one of the conductors such that the conductors are closer to each other at the indented portion than at the remainder of the conductor.
Inventors
- 👤 Lawrence C. Appalucci
- 👤 Luis F. Ortiz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:42
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2402; G08B13/2405; G08B13/2414; G08B13/242; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/0672; G08B13/2428; G08B13/2437; G08B13/2442; B; B32; B32B; B32B2519/00; B32B2519/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
135 words
A resonant tag circuit for use as an electronic article surveillance tag, comprising: a flexible substantially planar dielectric substrate having a first side and a second side; a first conductor positioned on said first side of said dielectric substrate; a second conductor positioned on said second side of said dielectric substrate, wherein at least one of said conductors comprises an inductor; and a flexible, substantially planar, tear resistant, polymeric film adhered to and covering one of said conductors and said substrate on the side of said substrate opposite to the side which is to be adhered to an article subject to surveillance, said film providing a vapor barrier for said one conductor and substrate minimizing effects of body detuning on said circuit, and promoting the secured integrity of said tag while maintaining the flexibility thereof.
Claim 2
Dependent Claim
135 words
A resonant tag circuit for use as an electronic article surveillance tag, comprising: a flexible substantially planar dielectric substrate having a first side and a second side; a first conductor positioned on said first side of said dielectric substrate; a second conductor positioned on said second side of said dielectric substrate, wherein at least one of said conductors comprises an inductor; and a flexible, substantially planar, tear resistant, polymeric film adhered to and covering one of said conductors and said substrate on the side of said substrate opposite to the side which is to be adhered to an article subject to surveillance, said film providing a vapor barrier for said one conductor and substrate minimizing effects of body detuning on said circuit, and promoting the secured integrity of said tag while maintaining the flexibility thereof.
Claim 3
Dependent Claim
27 words
A resonant tag circuit according to claim 1, whereby said polymeric film resists warping or shrinkage, thereby providing a substantially smooth, wrinkle-free printing surface opposite said conductor.
Claim 4
Dependent Claim
20 words
A resonant tag circuit according to claim 1, wherein said tag has a thickness not greater than about 7 mils.
Claim 5
Dependent Claim
16 words
A resonant tag circuit according to claim 1, wherein said dielectric substrate comprises a polymeric material
Claim 6
Dependent Claim
14 words
A resonant tag circuit according to claim 4, wherein said dielectric substrate comprises polyethylene.
Claim 7
Dependent Claim
13 words
A resonant tag circuit according to claim 1, wherein said conductor comprises aluminum.
Claim 8
Dependent Claim
15 words
A resonant tag circuit according to claim 1, wherein said polymeric film is a polyester.
Claim 9
Dependent Claim
21 words
A resonant tag circuit according to claim 1, wherein said polymeric film has a thickness not greater than about 2 mils.
Claim 10
Dependent Claim
21 words
A resonant tag circuit according to claim 1, wherein said polymeric film has a moisture absorption less than about 0.8 percent.
Claim 11
Dependent Claim
21 words
A resonant tag circuit according to claim 1, wherein said polymeric film has a tensile strength greater than about 26,000 psi.
Claim 12
Dependent Claim
36 words
A resonant tag circuit according to claim 1, wherein a pressure sensitive adhesive means adheres said polymeric film to said one conductor and substrate, said adhesive means having a thickness not greater than about 0.5 mils.
Claim 13
Dependent Claim
31 words
A resonant tag circuit according to claim 1, wherein said tag further comprises a release liner releasably adhered to said conductor and substrate on the opposite side from said polymeric film.
Claim 14
Dependent Claim
203 words
A deactivatable resonant tag circuit having a predetermined resonant frequency for use as an electronic article surveillance tag, comprising: a flexible substantially planar dielectric substrate having a first side and a second side; a first conductor positioned on said first side of said dielectric substrate; a second conductor positioned on said second side of said dielectric substrate, wherein at least one of said conductors comprises an inductor; means for deactivating said resonant tag circuit in response to an electromagnetic field of sufficient energy to destroy the resonant properties of said circuit, said deactivating means comprising a portion of at least one of said conductors which is indented in said substrate such that said conductors are closer to each other at said indented portion than the remainder of the conductor; and a flexible, substantially planar, tear resistant, polymeric film adhered to and covering one of said conductors and said substrate on the side of said substrate opposite to the side which is to be adhered to an article subject to surveillance, said film providing a vapor barrier for said one conductor and substrate minimizing effects of body detuning on said circuit, and promoting the secured integrity of said tag while maintaining the flexibility thereof.
Claim 15
Dependent Claim
203 words
A deactivatable resonant tag circuit having a predetermined resonant frequency for use as an electronic article surveillance tag, comprising: a flexible substantially planar dielectric substrate having a first side and a second side; a first conductor positioned on said first side of said dielectric substrate; a second conductor positioned on said second side of said dielectric substrate, wherein at least one of said conductors comprises an inductor; means for deactivating said resonant tag circuit in response to an electromagnetic field of sufficient energy to destroy the resonant properties of said circuit, said deactivating means comprising a portion of at least one of said conductors which is indented in said substrate such that said conductors are closer to each other at said indented portion than the remainder of the conductor; and a flexible, substantially planar, tear resistant, polymeric film adhered to and covering one of said conductors and said substrate on the side of said substrate opposite to the side which is to be adhered to an article subject to surveillance, said film providing a vapor barrier for said one conductor and substrate minimizing effects of body detuning on said circuit, and promoting the secured integrity of said tag while maintaining the flexibility thereof.
Claim 16
Dependent Claim
28 words
A deactivatable resonant tag circuit according to claim 13, wherein said polymeric film resists warping or shrinkage, thereby providing a substantially smooth, wrinkle-free printing surface opposite said conductor.
Claim 17
Dependent Claim
21 words
A deactivatable resonant tag circuit according to claim 13, wherein said tag has a thickness not greater than about 7 mils.
Claim 18
Dependent Claim
17 words
A deactivatable resonant tag circuit according to claim 13, wherein said dielectric substrate comprises a polymeric material.
Claim 19
Dependent Claim
14 words
A deactivatable resonant tag circuit according to claim 13, wherein said conductor comprises aluminum.
Claim 20
Dependent Claim
16 words
A deactivatable resonant tag circuit according to claim 13, wherein said polymeric film is a polyester.
Claim 21
Dependent Claim
22 words
A deactivatable resonant tag circuit according to claim 13, wherein said polymeric film has a thickness not greater than about 2 mils.
Claim 22
Dependent Claim
22 words
A deactivatable resonant tag circuit according to claim 13, wherein said polymeric film has a moisture absorption less than about 0.8 percent.
Claim 23
Dependent Claim
22 words
A deactivatable resonant tag circuit according to claim 13, wherein said polymeric film has a tensile strength greater than about 26,000 psi.
Claim 24
Dependent Claim
37 words
A deactivatable resonant tag circuit according to claim 13, wherein a pressure sensitive adhesive means adheres said polymeric film to said one conductor and substrate, said adhesive means having a thickness not greater than about 0.5 mils.
Claim 25
Dependent Claim
32 words
A deactivatable resonant tag circuit according to claim 13, wherein said tag further comprises a release liner releasably adhered to said conductor and substrate on the opposite side from said polymeric film.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |