Image Number 3 for United States Patent #6402005.
Process and device for handling a material web. The process includes moving the material web, at least in stretches, along with at least one circulating endless belt in a circulation direction and monitoring the movement of the edge of the at least one circulating endless belt. The process further includes driving repeatedly the circulating endless belt in a direction generally transverse to the circulation direction. The device includes at least one circulating endless belt for moving the material web along, at least in stretches, in a circular direction, and a master control unit for determining the transverse movement of the circulating endless belt. Additionally, the device includes at least one belt travel sensor for monitoring the position of the at least one circulating endless belt and repeatedly moving, in cooperation with the master control unit, the at least one circulating endless belt generally transverse to the circulation direction, and an activation device, for moving the sensor. The device further includes an associated control device, further comprising a pressure regulator and associated motorized adjustment device, for actuating the activation device. Sensor signals are generated by the at least one belt travel sensor, the signals being fed to the master control unit for determining the transverse movement of the at least one circulating endless belt.
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