Patent ID: 8060234
Filing Date: 2011-11-15
Classification: B65H,D21G,G01N

Abstract:
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.