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Accurate tracking of web features through converting processes

  • US 8,060,234 B2
  • Filed: 09/24/2008
  • Issued: 11/15/2011
  • Est. Priority Date: 09/27/2007
  • Status: Expired due to Fees
First Claim
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1. A system for locating a defect of a moving sheet having naturally varying properties during first and second sheet making processes, said system comprising:

  • a processor capable of executing code stored on a non-transitory medium, said code configured to;

    process a first digital representation of one lane of a reel produced from said moving sheet during said first sheet making process and a second digital representation of said one lane of said reel during said second sheet making process;

    obtain from said first digital representation a first pattern of the naturally varying properties of said moving sheet during said first sheet making process;

    obtain from said second digital representation a second pattern of the naturally varying properties of said moving sheet during said second sheet making process; and

    locate said sheet defect during said second sheet making process by correlating said first and said second patterns.

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