Web-feed roller and drive-control arrangement for this

摘要

A web-feed roller is driven by a compact and simple web-feed roller drive device which is incorporated in the web-feed roller. The web-feed roller comprises a supporting shaft, a cylindrical hollow member carried rotatably on the supporting shaft, a stator which is provided with an electrically conductive member and which is fastened on the supporting shaft, a rotor which is fastened to the cylindrical hollow member so as to be in alignment with the stator, and an electrically conductive member which is connected to the conductive member of the stator. The web-feed roller is connected electrically to a drive-control arrangement which is provided with a speed-control device controlling the drive speed of the web-feed roller and with a signal-generating device which transmits a speed signal representing an actual speed of the web-feed roller to the speed-control device.