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US4250796A Method and apparatus for making bags from tubular or semi-tubular webs 失效
用于从管状或半管状网制袋的方法和装置

Method and apparatus for making bags from tubular or semi-tubular webs
摘要:
In a method of making bags from a travelling web of superimposed plastics film, the web is cut transversely, the edges of the ends so formed are moved apart and the ends are then transversely welded.
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