| 摘要 |
The films are clamped in the weld areas, welded, separated and both weld seams exposed to cooling surfaces to remove the weld heat, leaving a tight cross weld. The welding plunger and counter-plunger or anvil are chamfered forward to change the direction of the welded film after welding, and in this way bring each weld into contact with the cooling surfaces as provided by the anvil plunger and clamps holding the welding head. |
