Activate/deactiveable security tag with enhanced electronic protection for use with an electronic security system
    1.
    发明授权
    Activate/deactiveable security tag with enhanced electronic protection for use with an electronic security system 失效
    激活/不起作用的安全标签,具有增强的电子保护功能,可与电子安全系统一起使用

    公开(公告)号:US06400271B1

    公开(公告)日:2002-06-04

    申请号:US09528637

    申请日:2000-03-20

    IPC分类号: G08B1314

    摘要: A security tag for use with an electronic security system which functions within a second frequency range comprises a substantially planar dielectric substrate having first and second sides. A first conductive pattern is provided on the first side of the substrate, the first conductive pattern comprising at least a first inductive element, a first plate of a first capacitive element and a first plate of a second capacitive element. A second conductive pattern located on the second side of the substrate comprises at least a second inductive element, a second plate of the first capacitive element and a second plate of a second capacitive element with the plates of the capacitive elements being generally aligned. The inductive elements and the capacitive elements form a resonant circuit which resonates at a first frequency within a first frequency range which is outside of the second frequency range. A direct electrical connection extends through the substrate to electrically connect the first conductive pattern to the second conductive pattern to thereby continuously maintain both sides of the substrate at substantially same static charge level.

    摘要翻译: 用于与在第二频率范围内工作的电子安全系统的安全标签包括具有第一和第二侧面的基本上平面的电介质基片。 第一导电图案设置在基板的第一侧上,第一导电图案至少包括第一电感元件,第一电容元件的第一板和第二电容元件的第一板。 位于衬底的第二侧上的第二导电图案包括至少第二电感元件,第一电容元件的第二板和第二电容元件的第二板,其中电容元件的板通常对齐。 电感元件和电容元件形成谐振电路,其在第二频率范围外的第一频率范围内以第一频率谐振。 直接电连接延伸穿过基板以将第一导电图案电连接到第二导电图案,从而将基板的两侧连续地保持在基本相同的静电荷水平。

    Security tag and manufacturing method
    3.
    发明授权
    Security tag and manufacturing method 失效
    安全标签和制造方法

    公开(公告)号:US5754110A

    公开(公告)日:1998-05-19

    申请号:US612356

    申请日:1996-03-07

    IPC分类号: G08B13/24 H01F5/00 G08B13/14

    摘要: 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, a peripheral outer edge, and a resonant circuit capable of resonating at a frequency within the predetermined detection frequency range. The security tag also includes a guard member, in one embodiment a discontinuous conductive member, effectively electrically isolated from the resonant circuit, extending along at least a portion of the peripheral outer edge of the substrate for surrounding at least a portion of the resonant circuit. The guard member electrically isolates the resonant circuit to facilitate testing of the resonant circuit during an early stage of the manufacturing process when the resonant circuit is in web form.

    摘要翻译: 一种与电子物品监视系统一起使用的安全标签,用于利用在预定检测频率范围内的频率的电磁能量来检测监视区域内的标签的存在,其包括具有第一和第二相对原理表面的电介质基板,外围外边缘, 以及能够以预定检测频率范围内的频率谐振的谐振电路。 安全标签还包括防护构件,在一个实施例中,与谐振电路有效地电绝缘的不连续导电构件沿着衬底的周边外边缘的至少一部分延伸,以围绕谐振电路的至少一部分。 当谐振电路处于网状时,保护构件将谐振电路电隔离,以便在制造过程的早期阶段对谐振电路进行测试。

    Deactivateable resonant circuit
    5.
    发明授权
    Deactivateable resonant circuit 失效
    不可激励的谐振电路

    公开(公告)号:US5861809A

    公开(公告)日:1999-01-19

    申请号:US934979

    申请日:1997-09-22

    摘要: A resonant 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 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 a surface of a dielectric substrate of the tag. The inductor is formed with a discontinuity or gap, causing an electrical open circuit. The open circuit is closed with a fuse secured proximate to the gap and wirebonded to the portions of the inductor proximate to the gap. The fuse is melted by a current greater than a predetermined level flowing therethrough. Such a high current may be induced in the inductor by an external electromagnetic field. Melting of the fuse causes an open circuit condition, which alters the frequency at which the tag resonates.

    摘要翻译: 与电子物品监视系统一起使用的共振标签用于利用在预定检测频率范围内的频率的电磁能量来检测监视区域内的标签的存在,包括能够以预定检测频率范围内的频率谐振的谐振电路。 谐振电路包括至少部分地形成在标签的电介质基板的表面上的电感器。 电感器形成有不连续或间隙,导致电开路。 开路被封闭,保险丝固定在靠近间隙处并且引线接合到靠近间隙的电感器的部分。 保险丝由大于流过其中的预定水平的电流熔化。 可以通过外部电磁场在电感器中感应出高电流。 保险丝的熔化导致开路状态,这改变了标签谐振的频率。