Method and apparatus for deactivating targets used in electromagnetic type article surveillance systems
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United States of America Patent
Stats
-
Aug 4, 1987
Grant Date -
N/A
app pub date -
Mar 18, 1986
filing date -
Mar 18, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A deactivator for deactivating targets used in electromagnetic article surveillance systems comprises a solid element with a convexly curved outer surface, e.g., a cylinder and a plurality of permanent magnets which form a patter of variously directed magnetic fields is a plane adjacent the surface. The curved surface of the deactivator is rolled over a target to be deactivated. The magnets are also arranged in adjacent layers with the magnets of one layer extending in a different direction from the magnets of the other layer to form a composite magnetic pattern which is discontinuous in all directions.
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