| 摘要 |
Lining bags with plastics pockets Is effected by thermo-welding transversely a length of plastics lay-flat tube, holding the length of the lay-flat tube in a stretched condition, opening the bag for insertion of the length of the tube in the bag and severing the length of the lay-flat tube from the supply roll of the tube whereby a transverse thermo-weld is formed simultaneously for the following plastics pocket such that the process of lining can be repeated automatically. |
