| 摘要 |
<p>Magnetic security tags/labels require to be activated/deactivated by magnetization/demagnetization and to enable this to be effected in bulk, with tagged products packed in a crate or stacked on a pallet, the invention proposes the provision of bulk magnetization/demagnetization coils generating a powerful magnetic field which is applied to the crate or pallet with a particular orientation which ensures that regularly shaped (eg. rectangular) packages packed/stacked together and each carrying a security tag/label will each be subjected to a magnetic field component directed appropriately for magnetization/demagnetization of the respective tag/label irrespective of the particular orientation of the tag/label on the particular package. One embodiment uses spaced-apart coils (6-1, 6-2) with an enclosure (2) therebetween into which a rectangular crate/pallet can be placed, the enclosure (2) constraining the crate/pallet to a particular orientation within the enclosure, and the coils (6-1, 6-2) having a particular orientation with the enclosure.</p> |
