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System and method for discriminating a roll in a paper roll dispenser, and a paper roll

  • US 20050011987A1
  • Filed: 06/02/2004
  • Published: 01/20/2005
  • Est. Priority Date: 06/03/2003
  • Status: Abandoned Application
First Claim
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1. A system for discriminating a roll placed in a paper roll dispenser, comprising:

  • at least two conducting plates located within the paper roll dispenser such that when the roll is positioned within the dispenser, the plates are in proximity of the roll, the plates being electrically insulated from each other;

    means for detecting capacitance between the plates and generating a signal indicative of said capacitance; and

    means for discriminating said paper roll based on a value of the signal.

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