| 摘要 |
<p>Thermoplastic bags are welded using jaws to close together at the middle of the bag and seal them. In the process, the bag is tightened towards its neck by short movement of the jaws, it is relaxed. A weld seam is produced near the jaws, excess bag material is removed, and the bag is conveyed further. The process produces an aesthetically attractive pack. Printing remains legible, and energy consumption of process is low.</p> |
