| 摘要 |
A fastening device (20) designed to be suitably used with needle detectors. The fastening device (20) does not trigger alarms from needle detectors. The fastening device (20) comprises a frame having a plurality of metallic strips (22, 26) coupled contiguously to form an enclosure. The plurality of metallic strips (22, 26) are selected from a group of metallic materials having different ferromagnetic responses and at least two of said selected metallic strips have different ferromagnetic responses. Thereby when said fastening device (20) is attached to a garment and said garment is passed through a needle detector, said fastening device (20) does not trigger a false alarm from said needle detector. A tongue (30) is further attached to one of the metallic strips (26). |
