METHOD OF INITIATING THE PREMATURE REPLACEMENT OF A ROLL OF MATERIAL

摘要

A process for initiating a premature roll change of a web to be unwound from a spool, the process including the steps of measuring temperature at an end of the spool in a zone up to 150 mm away from a surface of the spool in a radial direction during a time that the roll has between 100% and 60% of its fully wound weight, using a non-contact measuring device, determining a radial distance from the spool surface when a temperature difference 0.5 .degree.C is found between temperature measurement locations in the zone and cooler adjacent areas, and storing the determined distance for triggering a signal that initiates a replacement of the roll when that distance is reached.