Method for manufacturing discrete articles from a material web using synchronized servo-actuated operational units
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United States of America Patent
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Mar 22, 2005
Grant Date -
Jan 8, 2004
app pub date -
Jun 26, 2002
filing date -
Jun 26, 2002
priority date (Note) -
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Abstract
Method for manufacturing discrete articles from a material web using a cyclic master reference signal to synchronize the servo actuation of multiple operational units in a manufacturing apparatus to perform periodic operations on successive product segments of the material web and thereby form the articles, without the need for ongoing external phasing or registration to maintain synchronization of the operational units relative to the articles being made. The method is particularly suited for application in the manufacture of disposable absorbent articles and other products formed from web materials. Because of the coordination by a common reference signal, the execution by each of the individual servo systems of its programmed actuation instructions results in its actuation being synchronous with that of the other servo systems. These actuation instructions can include motion profiles, torque profiles, force profiles, 'cam' profiles, and any other form of actuation sequence within the capability of servo actuators.
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