发明授权
EP0922274B2 MAGNETOMECHANICAL ELECTRONIC ARTICLE SURVEILLANCE MARKER WITH LOW-COERCIVITY BIAS ELEMENT
失效
磁机械电子商品控制与施力装置低保磁力LABEL
- 专利标题： MAGNETOMECHANICAL ELECTRONIC ARTICLE SURVEILLANCE MARKER WITH LOW-COERCIVITY BIAS ELEMENT
- 专利标题（中）： 磁机械电子商品控制与施力装置低保磁力LABEL
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申请号： EP97938515.0申请日： 1997-08-21
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公开(公告)号： EP0922274B2公开(公告)日： 2011-02-16
- 发明人: COPELAND, Richard, L. , COFFEY, Kevin, R.
- 申请人： Sensormatic Electronics Corporation
- 申请人地址： 6600 Congress Avenue Boca Raton, Florida 33487 US
- 专利权人： Sensormatic Electronics Corporation
- 当前专利权人： Sensormatic Electronics Corporation
- 当前专利权人地址： 6600 Congress Avenue Boca Raton, Florida 33487 US
- 代理机构： Hafner, Dieter
- 优先权： US697629 19960828
- 国际公布： WO1998009263 19980305
- 主分类号： G08B13/181
- IPC分类号： G08B13/181 ; G08B13/24
摘要：
A material used to form a biasing element (16) for a magnetomechanical EAS marker (10) has a coercivity that is lower than the coercivity of biasing elements used in conventional magnetomechanical markers. The marker (10) formed with the low coercivity material can be deactivated by applying an AC magnetic field at a level that is lower than is required for deactivation of conventional markers (curve 26). The marker (10) with the low coercivity bias element (16) can also be deactivated when at a greater distance from a deactivation device than was previously practical.
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