| 摘要 |
<p>PCT No. PCT/SE96/01547 Sec. 371 Date Jun. 10, 1998 Sec. 102(e) Date Jun. 10, 1998 PCT Filed Nov. 26, 1996 PCT Pub. No. WO97/21535 PCT Pub. Date Jun. 19, 1997The present invention relates to a method of welding or cutting material ultrasonically while avoiding hammering motion between ultrasonic anvil and ultrasonic horn, so-called cobblestoning. The material web is welded or cut generally transversely to its direction of movement, wherein at least one elongated ultrasonic horn is positioned obliquely to the direction of web movement, and at least on anvil corresponding to the ultrasonic horn is arranged on a rotatable cylinder whose rotational axis is essentially parallel with the longitudinal axis of the ultrasonic horn.</p> |
