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    APPARATUS FOR ELECTRONIC ARTICLE SURVEILLANCE TAG POLLUTION REDUCTION
    3.
    发明公开
    APPARATUS FOR ELECTRONIC ARTICLE SURVEILLANCE TAG POLLUTION REDUCTION 有权
    装置，减少电子物品保护标签的污染

    公开(公告)号：EP1388141A1

    公开(公告)日：2004-02-11

    申请号：EP02769749.9

    申请日：2002-05-15

    申请人： Sensormatic Electronics Corporation

    发明人： HO, Wing ,  MORGADO, Eugenio ,  SPECIALE, Larry

    IPC分类号： G08B13/14

    CPC分类号： G08B13/2434 ,  G08B13/2411 ,  G08B13/2445

    摘要： A magnetomechanical EAS tag (10) having a bias magnet (18) made of a high magnetostrictive material so that stress, which is a result of ordinary use of an article (12) incorporating the tag, demagnetises the bias rending the EAS tag inactive is provided. In an alternate embodiment a mechanical mechanism is incorporated with a conventional EAS tag to deactivate the tag upon ordinary use of an article to which the tag is associated. In yet another embodiment, a combination of the bias magnet made of a high magnetostrictive material and a mechanical deactivation mechanism is used to deactivate the EAS tag during ordinary use of an article to which the tag is associated.

    MULTI-THREAD RE-ENTRANT MARKER WITH TRANSVERSE-ANISOTROPY FLUX CONCENTRATORS
    4.
    发明公开
    MULTI-THREAD RE-ENTRANT MARKER WITH TRANSVERSE-ANISOTROPY FLUX CONCENTRATORS 审中-公开
    与横向各向异性磁通集中多导线交叉标记标签

    公开(公告)号：EP1040458A1

    公开(公告)日：2000-10-04

    申请号：EP98957662.4

    申请日：1998-11-09

    申请人： Sensormatic Electronics Corporation

    发明人： HO, Wing ,  YAMASAKI, Jiro

    IPC分类号： G08B13/14 ,  G08B13/24 ,  C21D1/04

    CPC分类号： G08B13/2408 ,  G08B13/2437 ,  G08B13/2442

    摘要： A marker (20) for a harmonic electronic article surveillance system includes three wires (21) of magnetic material arranged in parallel. The material has a magnetic hysteresis loop with a large Barkhausen discontinuity such that, upon exposure of the marker (20) to an external magnetic field whose field strength in the direction opposing the instantaneous magnetic polarization of the marker exceeds a predetermined threshold value, there results a regenerative reversal of the magnetic polarization in the material. The three wires (21) are coupled at opposite ends thereof by flux concentrating elements (22, 23) formed of a highly permeable material so that all three wires exhibit the regenerative reversal simultaneously on exposure to the above-described magnetic field. The flux concentrators have magnetic anisotropies oriented transversely relative to the length of the wires to aid in coupling the wires for simultaneous switching.