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Insert for use with a roll of web material, and providing a unique identifier for the roll of web material

  • US 9,066,638 B2
  • Filed: 04/22/2010
  • Issued: 06/30/2015
  • Est. Priority Date: 04/22/2010
  • Status: Active Grant
First Claim
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1. A method of regulating product dispensing from a dispenser, the method comprising:

  • selecting a plug that removably interacts with an electromagnetic field created by a field generator of a dispenser to be inserted into an open end of a rolled product, wherein the plug comprises a stem and a cap extending from the stem and wherein a metallic ring is mounted within at least one of the stem and cap;

    inserting said plug into an open end of the rolled product;

    creating an electromagnetic field having a characteristic frequency proximate the plug when the rolled product with the inserted plug is mounted in the dispenser;

    detecting a change to the characteristic frequency, the change created by the presence of the metallic ring associated with the plug as a function of a position of the metallic ring mounted in the plug, independent of the position of the plug relative to the rolled product;

    comparing the changed frequency to a verification frequency; and

    enabling motorized advancement of the rolled product if the changed frequency substantially matches the verification frequency.

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