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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0521084 (1995-08-29) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 486 인용 특허 : 0 |
A security tag used with an electronic article surveillance system for detecting the presence of the tag within a surveilled area utilizing electromagnetic energy at a frequency within a predetermined detection frequency range includes a dielectric substrate having first and second opposing principl
A security tag used with an electronic article surveillance system for detecting the presence of the tag within a surveilled area utilizing electromagnetic energy at a frequency within a predetermined detection frequency range includes a dielectric substrate having first and second opposing principle surfaces and a resonant circuit capable of resonating at a frequency within the predetermined detection frequency range. The resonant circuit includes an inductor formed at least in part on one of the principal surfaces of the substrate. A first perforation path formed of a series of spaced apart perforations extends along a line across the substrate and through at least a portion of the inductor such that a stress exerted on the tag breaks the tag and the inductor along the first perforation path, causing an open circuit condition which prevents the resonant circuit from resonating. In use, the security tag is affixed to an article and the stress applied to the article is a result of normal or ordinary use of the article.
A security tag for use with an electronic security system, the security system having means for detecting the presence of a security tag within a surveilled area utilizing electromagnetic energy at a frequency within a predetermined detection frequency range, the security tag comprising: a dielectri
A security tag for use with an electronic security system, the security system having means for detecting the presence of a security tag within a surveilled area utilizing electromagnetic energy at a frequency within a predetermined detection frequency range, the security tag comprising: a dielectric substrate having first and second opposite principal surfaces; a resonant circuit capable of resonating at a frequency within the predetermined detection frequency range, the resonant circuit including an inductor formed at least in part on one of the principal surfaces of the substrate; and a first perforation path comprising a series of spaced apart perforations extending along a line across the substrate, the line extending through at least a portion of the resonant circuit, wherein a stress exerted on the tag breaks the resonant circuit along the first perforation path thereby causing an electrical open circuit condition which prevents the resonant circuit from resonating.
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