| 摘要 |
A drive assembly for operatively rotating a web spreading roll of a paper mill or the like utilizes a toothed belt for transferring rotational motion from a motor-operated driving toothed pulley to a freewheeling or otherwise rotatably mounted driven toothed pulley. The driven pulley is, in turn, coupled to at least one of the plural rotary driven roll segments of and that are carried on the curved shaft of the web spreading roll. To minimize wear on the toothed belt, the driving and driven pulleys are fixedly mounted in positions of permanent alignment with one another, as by mounting both the drive motor and the driven pulley on the shaft bearings housing located at one end of the spreading roll shaft. A flexible coupling, as in the form of a rubber or otherwise suitably resilient bellows or the like, connects the driven pulley to the at least one roll segment for transferring rotation of the driven pulley to the roll segment so as to operatively rotate the web spreading roll.
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