| 摘要 |
1,122,054. Carrier bag. WINDMÍLLER & HÍLSCHER. 17 Aug., 1965 [24 Aug., 1964], No. 35260/65. Heading A4G. In a process of and apparatus for making griphole carrier bags from heat-sealable material, two layers 26, 27 of plastics web are moved forwardly intermittently by rollers 21, 22, and during standstill periods the holes 7 are cut by a platen 25 moving on to a fixed die 24, the pieces removed being blown away by air through platen opening 28. The two layers are then spaced apart, at least adjacent the holes, e.g. by a spacer 31 and two ribbons of joined griphole reinforcements 17, 18 are fed to the web outer surfaces where, during a standstill, opposed pressure jaws 46, 47 ensure that a heating element 34 on the spacer heat seals the reinforcements around the holes. Finally the web is heat sealed transversely to form the bag bottom by welding jaws 52, 53 and cut by knife 54, 55. The apparatus can form bags from plain or edge pleated tubing with a transverse bottom seal and cut or from a side folded or pleated web with two side seals and cuts. The oval reinforcements may be joined by one part on the long axis or by two parts on the short axis to form the ribbon. If the reinforcements are placed on the inner surfaces of the web, the ribbon may be directed laterally between the webs using an internal knife with external sealing jaws or the edges of the web may be displaced at right angles to each other by guides to enable ribbon feeds and sealing jaws at right angles to each other to secure the reinforcements. The reinforcements may also be positioned by laterally pushing them from a pile and may be provided in pairs with closure snap fasteners. |
