| 摘要 |
A machine for the manufacture of flexible pouches for containing liquids for pharmaceutical or alimentary use comprises a band (2) of flexible plastic material made up of two edges (4, 5) folded one on the other one according to a U-shape conformation with opening arranged sideways, means (1) for the step by step advancement of said band (2) of flexible plastic material, heat welding means (6, 8) for welding said edges (4, 5) to each other transversally and along said opening so as to form single pouches (9) of flexible plastic material arranged next to each other, and a device (13) for introducing a variable number of tubes (14) of plastic material into said opening and to support them into it during welding. The device (13) comprises a supporting bar (16) for a plurality of metallic needles (19) parallel to each other, destined to the support of respective tubes (14), and the supporting bar (16) is slidable in direction transversal to the one of advancement of the band (2) in order to be movable between a back position, in which the loading of the tubes (14) on respective needles (19) is operable, and a position near the band (2), in which said needles (19) insert and keep the respective tubes (14) inside said opening of the band (2) for the entire welding operation. There are provided means (15) for preheating the tubes (14) after the their loading on said needles (19) and before their introduction into said opening of the band (2). |
