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group and method of feeding rolls of material in sheet, in particular, but not exclusively, plastic film printed with references to position for automatic sugar packer
group and method of feeding rolls of material in sheet, in particular, but not exclusively, plastic film printed with references to position for automatic sugar packer
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机译:料卷,特别是但不是唯一地,将塑料卷印刷在塑料薄膜上的方法和方法
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摘要
A feeding unit from reels of sheet-like material , in particular but not exclusively printed plastic film with print-position marks for automatic packaging machines, comprising two unrolling shafts of respective reels of material for feeding in turn said material towards a unit that cuts and welds the tail of material of a running out reel and the head of a fresh, loaded reel. Such a unit comprising suction, cutting and welding devices (7, 8) movable so as to approach and move away from each other to press the material (F1, F2) over a welding plane. Each device is formed by a group of mutually stacked suction and cutting modules, at least two of such modules having respective guides for slidable in a transversal direction with the respect to the feeding direction of the material, whereby it is possible to select and adjust the number of modules according to a desired welding height.
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