Apparatus and method for controlling the unwinding of a web
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United States of America Patent
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Dec 26, 2017
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app pub date -
Jun 20, 2014
filing date -
Jun 20, 2014
priority date (Note) -
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Abstract
An apparatus (1) for controlling the unwinding of a web (2) wound on a core is disclosed. The apparatus (1) includes a turnbar (10), an actuator (20), a sensor (30), and a controller (70). The turnbar (10) includes a target location to receive the web (2). The actuator (20) is coupled to the turnbar (10) and includes an axis of movement (29). The sensor (30) measures transverse placement of the web (2) relative to the target location and transmits an input signal to the controller (70) when transverse placement of the web (2) differs from the target location. The controller (70) provides an output signal to the actuator (20 to move the turnbar (10) along the axis of movement (29) such that the web (2) maintains substantial alignment with the target location.
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