December 2009 PFFC

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Your Guide to the Right Web Guide

Webs are blind — they don't know where they are going. With a well-aligned roller, sufficient tension, and good traction, the web has a tendency to track down the centerline of a machine. However, web and machine are not perfect and many processes occasionally lose tension or traction, so centerline tracking can't be assumed. Enter the automatic web guide, the seeing-eye dog of the converting industry. All converting processes have some left-right tolerance of web position. The first goal in web guiding is to get the unwinding roll aligned to the roller or centerline of the machine. This ...

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