US4954814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tag and method of making same
Assignee: Sensormatic Electronics Corp
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Filing: 1989-09-11
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Granted: 1990-09-04
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Expires: 2009-09-11
Abstract
Abstract This invention relates to a deactivatable tag useable with an electronic article surveillance system and comprised of planar conductive material cut into a pair of inverse, first and second spiral conductors wrapped about each other and positioned for capacitance and inductive coupling. The invention also relates to method of making tags wherein conductors are cut from a planar web of conductive material in a continuous process in a manner that the cutting results in the formation of two spiral conductors without accompanying waste of conductive material, and thereafter positioning the conductors to provide resonant circuits. The conductors of each pair are connected by welding to provide a reliable circuit. A deactivator includes a composite strip with a conductive layer, a normally nonconductive layer adhered to the conductive layer, and a coating surrounding the adhered layers which is positioned in proximity to the resonant circuit so that, when excess energy is applied to the deactivator, the normally non-conductive layer becomes conductive and the coating is rendered ineffective whereby the resonant circuit is deactivated.
Inventors
- 👤 S. Eugene Benge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:54
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; G08B13/244; G08B13/2442; H; H05; H05K; H05K3/00; H05K3/02; H05K3/04; H05K3/046; H05K3/10; H05K3/20; H05K3/202; H10; H10D; H10D84/00; H10D84/01; H05K1/00; H05K1/16; H05K1/165; H05K2203/00; H05K2203/05; H05K2203/0502; H05K2203/0522; H05K2203/15; H05K2203/1545
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
97 words
Method of making tags for use in an electronic article surveillance system, comprising the steps of: providing a detectable resonant circuit, forming a deactivator for deactivating the resonant circuit, wherein the forming step includes providing a composite strip having a conductive layer, a normally non-conductive layer adhered to the conductive layer and a coating surrounding the adhered layers, and positioning the composite strip in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive and the coating is rendered ineffective whereby the resonant circuit is deactivated.
Claim 2
Dependent Claim
97 words
Method of making tags for use in an electronic article surveillance system, comprising the steps of: providing a detectable resonant circuit, forming a deactivator for deactivating the resonant circuit, wherein the forming step includes providing a composite strip having a conductive layer, a normally non-conductive layer adhered to the conductive layer and a coating surrounding the adhered layers, and positioning the composite strip in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive and the coating is rendered ineffective whereby the resonant circuit is deactivated.
Claim 3
Dependent Claim
13 words
Method as defined in claim 1, wherein the coating includes an acrylic resin.
Claim 4
Dependent Claim
31 words
Method as defined in claim 1, wherein the forming step includes slitting the composite strip from a wide web using knives so that the side edges are formed by knife cutting.
Claim 5
Dependent Claim
31 words
Method as defined in claim 2, wherein the forming step includes slitting the composite strip from a wide web using knives so that the side edges are formed by knife cutting.
Claim 6
Dependent Claim
25 words
Method as defined in claim 1, wherein the coating includes normally non-conductive material which is rendered conductive when excess energy is applied to the deactivator.
Claim 7
Dependent Claim
102 words
Method of making tags for use in an electronic article surveillance system, comprising the steps of: providing a detectable resonant circuit, forming a deactivator for deactivating the resonant circuit, wherein the forming step includes providing a composite strip having a conductive layer having side edges, a normally non-conductive layer adhered to the conductive layer and a coating on at least the side edges, and positioning the composite strip in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive and the coating is rendered ineffective whereby the resonant circuit is deactivated.
Claim 8
Dependent Claim
102 words
Method of making tags for use in an electronic article surveillance system, comprising the steps of: providing a detectable resonant circuit, forming a deactivator for deactivating the resonant circuit, wherein the forming step includes providing a composite strip having a conductive layer having side edges, a normally non-conductive layer adhered to the conductive layer and a coating on at least the side edges, and positioning the composite strip in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive and the coating is rendered ineffective whereby the resonant circuit is deactivated.
Claim 9
Dependent Claim
13 words
Method as defined in claim 6, wherein the coating includes an acrylic resin.
Claim 10
Dependent Claim
25 words
Method as defined in claim 6, wherein the coating includes normally non-conductive material which is rendered conductive when excess energy is applied to the deactivator.
Claim 11
Dependent Claim
31 words
Method as defined in claim 1, wherein the forming step includes slitting the composite strip from a wide web using knives so that the side edges are formed by knife cutting.
Claim 12
Dependent Claim
90 words
A tag for use in an electronic article surveillance system, the tag comprising: a detectable resonant circuit, a deactivator for deactivating the resonant circuit, wherein the deactivator includes a composite strip having a conductive layer, a normally non-conductive layer adhered to the conductive layer and a coating surrounding the adhered layers, the composite strip being positioned in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive and the coating is rendered ineffective whereby the resonant circuit is deactivated.
Claim 13
Dependent Claim
90 words
A tag for use in an electronic article surveillance system, the tag comprising: a detectable resonant circuit, a deactivator for deactivating the resonant circuit, wherein the deactivator includes a composite strip having a conductive layer, a normally non-conductive layer adhered to the conductive layer and a coating surrounding the adhered layers, the composite strip being positioned in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive and the coating is rendered ineffective whereby the resonant circuit is deactivated.
Claim 14
Dependent Claim
14 words
A tag as defined in claim 10, wherein the coating includes an acrylic resin.
Claim 15
Dependent Claim
26 words
A tag as defined in claim 10, wherein the coating includes normally non-conductive material which is rendered conductive when excess energy is applied to the deactivator.
Claim 16
Dependent Claim
89 words
A tag for use in an electronic article surveillance system, the tag comprising: a detectable resonant circuit, a deactivator for deactivating the resonant circuit, wherein the deactivator includes a composite strip having a conductive layer with side edges, a normally non-conductive layer adhered to the conductive layer and a coating on at least the side edges, the composite strip being positioned in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive whereby the resonant circuit is deactivated.
Claim 17
Dependent Claim
89 words
A tag for use in an electronic article surveillance system, the tag comprising: a detectable resonant circuit, a deactivator for deactivating the resonant circuit, wherein the deactivator includes a composite strip having a conductive layer with side edges, a normally non-conductive layer adhered to the conductive layer and a coating on at least the side edges, the composite strip being positioned in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive whereby the resonant circuit is deactivated.
Claim 18
Dependent Claim
90 words
A tag for use in an electronic article surveillance system, the tag comprising: a detectable resonant circuit, a deactivator for deactivating the resonant circuit, wherein the deactivator includes a composite strip having a conductive layer with cut side edges, a normally non-conductive layer adhered to the conductive layer and a coating on at least the side edges, the composite strip being positioned in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive whereby the resonant circuit is deactivated.
Claim 19
Dependent Claim
90 words
A tag for use in an electronic article surveillance system, the tag comprising: a detectable resonant circuit, a deactivator for deactivating the resonant circuit, wherein the deactivator includes a composite strip having a conductive layer with cut side edges, a normally non-conductive layer adhered to the conductive layer and a coating on at least the side edges, the composite strip being positioned in proximity to the resonant circuit so that when excess energy is applied to the deactivator the normally non-conductive layer becomes conductive whereby the resonant circuit is deactivated.
Claim 20
Dependent Claim
14 words
A tag as defined in claim 14, wherein the coating includes an acrylic resin.
Claim 21
Dependent Claim
26 words
A tag as defined in claim 14, wherein the coating includes normally non-conductive material which is rendered conductive when excess energy is applied to the deactivator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |