Web tensioning device with plural control inputs
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United States of America Patent
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Oct 21, 2008
Grant Date -
Dec 30, 2004
app pub date -
Nov 19, 2003
filing date -
Jun 19, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A web tensioning device utilizes a dancer arm which can be positioned by a controlled servo motor. In a preferred embodiment, the controller for the servo motor receives an input signal based on the acceleration (positive or negative) of the dancer arm and implements a torque component necessary to maintain predetermined web tension, for example, an applied torque component that changes the position of the dancer arm. The controller may also receive additional input signals indicative of the acceleration of the web itself.
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