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SYSTEMS AND METHODS FOR VERIFICATION OF SECURITY TAG DETACHMENT

  • US 20140253333A1
  • Filed: 03/11/2014
  • Published: 09/11/2014
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. A method for verifying a detachment of a security tag from an article, comprising:

  • producing, by a detaching unit, a first signal at a first frequency and a second signal at a second frequency when the security tag is in proximity to the detaching unit, the detaching unit operative to detach the security tag from the article;

    generating a third signal from the first and second signals applied to a non-linear electrical circuit of the security tag;

    ceasing generation of the third signal by the non-linear electrical circuit when a first portion of the security tag is moved a certain distance from the detaching unit; and

    determining by the detaching unit that the first portion of the security tag has been decoupled from a second portion of the security tag when the third signal is no longer being generated by the non-linear electrical circuit.

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