| 摘要 |
The present invention relates to a process for the heat weld sealing of the end edges of two side walls (2) of a flexible container pack to the flexible convex and generally arch-shaped sealing surfaces (3a, 3b) with a general arch shape of the support body (3) of a spout, in which the operative surface (6a, 6b) of each of the clamps (5a, 5b) used for applying under pressure the side walls (2) against the mentioned sealing surfaces (3a, 3b) are provided with an arched concavity, its span (a) being smaller than the span (A) of the arch of the respective sealing surface. |
