| 摘要 |
<p>The rotary impact cylinder apparatus includes an anvil cylinder (42) and a cooperating impacting cylinder (44) which are rotatably mounted at an operating position along a process line. The impacting cylinder is arranged to come into impacting relationship with the periphery of the anvil cylinder (42) at least once during each revolution of the inpacting cylinder (44). The impacting cylinder is driven at a variable speed, and is controlled so that its peripheral speed varies repetitively between a first speed, equal to the peripheral speed of the anvil cylinder, and a second speed. During the period that the impacting cylinder is in impacting relationship with the anvil cylinder the impacting cylinder rotates at said first speed. By this means the distance between successive impacts can be altered without having to change the inpacting cylinder. <IMAGE></p> |
