Closable opening device for sealed packages of pourable food products
作者： Claudia Miani , Ciacera Mauro La
DOI:
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摘要: There is described a closable opening device for sealed package containing pourable food product. The has tubular frame defining through hole and fitted about pierceable portion of the package; removeable threaded which screws onto to close hole; cutting member movably engaging hole, rotatably connected at least when disengaging cap from unsealing projecting axially inwards detach partly rest has, along lateral wall, number openings allow air into pouring
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