| 摘要 |
1,234,820. Packaging. SCHWEIZERISCHE INDUSTRIE-GES. 20 Dec., 1968 [22 Dec., 1967], No. 60636/68. Heading B8C. [Also in Division F2] An object 2 wrapped in a tube 1 of thermoplastic material is moved at a constant speed between a pair of rotating welding and cutting dies 3a, 3b which are driven by mechanism (see Division F2) at a cyclically varying angular velocity, the circumferential speed of the dies being sufficiently reduced so that during welding and cutting it equals the speed of the tube 1. |
