| 摘要 |
In an apparatus for making bags from a continuously fed flattened thermoplastic tubular or semi-tubular web of film, severing means for cutting the web into sections co-operate with a first welding cylinder for performing a welding operation on each section with the aid of welding tongs, the web sections being held to the welding cylinder by means of belts which partially envelop the cylinder, and a second welding cylinder is provided downstream of the first cylinder, the web sections being transferred to the second cylinder for the purpose of having a further welding operation performed on them. |
