FIELD: transport, package.
SUBSTANCE: invention relates to devices intended for packing articles or fluids, particularly, to devices transforming web of flexible packing material into tubular structure by rotary forming rollers that confine opening for material. Note here that, at least, one forming roller may displace relative to material when opening device arranged on material web passes through opening for material.
EFFECT: higher quality of tubular structure.
14 cl, 9 dwg
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