CLOSED-LOOP CONTROL OF UNTENSIONED PRODUCT LENGTH ON A WEB PRESS
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United States of America Patent
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Issued Date -
Nov 13, 2014
app pub date -
May 9, 2013
filing date -
May 9, 2013
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Abstract
A system and method is provided for closed loop control of an untensioned product length of a web moving through a printing press under tension during production. While a printing press is printing on the web, a controller receives a calculated untensioned product length Lo(t) of the web in the span of the printing press while the web is moving through the printing press under tension, compares L0(t) to a previously stored untensioned product length setpoint Lsetpoint, maintains closed loop control of the untensioned product length by controlling one or more components on the printing press as a function of said comparing step, and repeats the steps receiving, comparing, maintaining and controlling over time while the printing press is printing on the web.
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