| 摘要 |
A method of splicing a first web drawn from a running roll (26) and feeding at a selected line speed to the leading edge margin of a second web on a ready roll (28), which margin is releasably attached to the periphery of that roll and carries an adhesive (T). According to the method, the angular velocity of one of the rolls is controlled to obtain a speed match between the first web and the ready roll periphery and the instantaneous angular position of the edge margin is determined. Then, the first web is pressed against the ready roll periphery to form a nip at a time when the edge margin is at a selected phase angle ahead of the nip. Upon obtaining the speed match, the ready roll is accelerated to advance the edge margin through the nip to effect the splice between the two webs, after which the first web is severed behind the splice. |
