Glass-coated amorphous magnetic microwire marker for article surveillance
AssigneeAdvanced Coding Systems Ltd.
InventorsAlexandru Antonenco, Edward Brook-Levinson, Vladimir Manov, Evgeni Sorkine, Yuri Tarakanov
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Abstract
A magnetic marker for use in an article surveillance system, and an electronic article surveillance system utilizing the same are presented. The marker comprises a magnetic element formed by at least one microwire piece made of an amorphous metal-containing material coated with glass. The microwire piece has substantially zero magnetostriction, coercivity substantially less than 10 A/m, and permeability substantially higher than 20000.
Claims22
A magnetic marker for use in an article surveillance system, the marker comprising a magnetic element formed by at least one microwire piece made of an amorphous metal-containing material coated with glass, the microwire piece having substantially zero magnetostriction, coercivity substantially less than 10 A/m, and permeability substantially higher than 20000.
An electronic article surveillance system utilizing a marker mounted within an article to be detected by the system when entering an interrogation zone, the system comprising a frequency generator coupled to a coil for producing an alternating magnetic field within said interrogation zone, a magnetic field receiving coil, a signal processing unit, and an alarm device, wherein said marker comprises a magnetic element formed by at least one microwire piece made of an amorphous metal-containing material coated with glass, the microwire piece having substantially zero magnetostriction, coercivity substantially less than 10 A/m and permeability substantially higher than 20000.
Dependencies are inferred from the claim text.