Installation for manufacturing and stacking bags, sachets, etc. in thermoplastic material in which the upper welding jaw 9 as well as the upper knife 56 are mounted at fixed positions, the lower welding jaw 8 is mounted vertically mobile and its retaining shoulder 54 projecting downstream comprises as a counter -blade a transverse groove 55, and the blocking pad 71 comprises, a short distance from its underside, a leaf spring 78 extending upstream towards the welding jaws 8, 9 and coming from its end free upstream, in the relaxed position, in the immediate vicinity of the vertical plane passing through the downstream front face 54a of the retaining shoulder 54 of the lower jaw 8. BR/ (CF DRAWING IN BOPI) BR/ BR /
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机译：用于制造和堆叠用热塑性材料制成的袋，小袋等的装置，其中上焊接钳口9和上刀56安装在固定位置，下焊接钳口8垂直安装，其固定肩部54向下游伸出包括作为横向叶片的横向叶片55，并且阻挡垫71在其松弛位置中包括从其底侧起短距离的片簧78，该片簧78朝着焊接钳口8、9向上游延伸并且从其自由端向上游延伸。在垂直平面附近，垂直平面穿过下颚8的固定肩部54的下游前表面54a。 （CF DRAWING IN BOPI）
