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Answer to use a system of electronic supervision of the article, process for producing a respond to a system of electronic supervision of supervisory system article, electronic article.Process for detecting the presence of a reply, and apparatus for generating signals for the electronic supervision interrogacao)
Answer to use a system of electronic supervision of the article, process for producing a respond to a system of electronic supervision of supervisory system article, electronic article.Process for detecting the presence of a reply, and apparatus for generating signals for the electronic supervision interrogacao)
A responder for electronic article surveillance apparatus is made by subjecting a plurality of magnetizable elements to heating in the presence of a magnetic field and maintaining the field at a different intensity for each element as it is cooled to provide different magnetic characteristics so that when the responder is subjected to a cyclically varying magnetic interrogation field its several elements produce spaced apart pulses in each cycle.
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