| 摘要 |
A machine for forming at least one longitudinal flange or pleat in a continuous tubular bag material which is then filled, transversely sealed and cut to form individual bags or pouches comprises a base 16 which includes a slot 22 though which a fold 13 in the tubular bag material passes, apertures 24 facing the slot 22 which delivers hot gas to the said fold 13 and a pressure device 25 to apply pressure to the fold 13 after it has been heated. As the fold 13 in the tubular bag material is passed though the slot 22 in the base 16, hot gas is delivered though the apertures 24 thus heating the fold 13. The fold 13 then passes though the pressure device 25 thus adhering the folded portions of the bag together thus forming a flange or pleat 11. The base preferably includes a chamber 17 into which pressurised air is delivered and a heating element 19 which heats the air in the chamber before it passes though ducts 18 to the said apertures 24. The pressure device 25 may be a pair of rollers positioned to engage opposites side of the fold in the tubular bag material. If more than one flange or pleat 11 is to be formed a further machine is required to form each. |
