INTERACTIVE PROCESS CONTROL FOR SINGLE FACE PRODUCTION
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United States of America Patent
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Issued Date -
Jun 11, 2015
app pub date -
Nov 13, 2014
filing date -
Dec 5, 2013
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Abstract
A method for minimizing cross-machine direction variations in temperature and moisture content of a web running through a corrugator single facer. The method includes running the web through a web preheater station of the single facer and capturing an image representing an actual temperature of the web downstream of the preheater station in the cross-machine direction with a thermal imaging device. The method includes sending the image to a programmed process controller that applies thermal pattern recognition to the image and determining with the controller if the actual temperature of the web deviates from a desired temperature range. The method also includes determining with the controller a corrective action that will bring the actual temperature of the web within the desired temperature range and generating and sending a control signal with the controller to vary an operating condition of the preheater station so as to bring about the corrective action.
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