| 摘要 |
<p>A conveyor for sheet material articles such as PC boards comprises two belts arranged to circulate in parallel. Associated with each belt are an article flipper (26) arranged for turning the articles through 180 DEG if required, a belt tensioner (22) arranged for tensioning the belt by engaging it from outside its circulation path, and a belt change facilitator (24). The belt change facilitator comprises a sprocket (58) for circulating the belt, a splined shaft (60), and a releasable lock (94) for connecting the shaft to the sprocket of one of the belts. <IMAGE></p> |
