Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1980-08-18
1982-06-01
Wityshyn, Michael G.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
156267, 156443, 156510, 493208, 493234, 493254, 493342, 493926, B31B 116, B31B 164, B31B 186
Patent
active
043325785
ABSTRACT:
An apparatus for making thermoplastic carrier bags (so-called T-shirt bags) comprises means for feeding a continuous tubular strip of thermoplastic film, either side of which comprises a gusset fold, said strip being advanced with a constant velocity to a cylindrical drum the housing of which comprises embedded heatsealing means, said apparatus further comprising a cutting member and a transverse cutting knife co-operating with the strip said member sequentially providing the tubular strip with a U-shape cut upstream of the drum and said cutting knife operating synchronously with the cutting member in co-operation with the drum for transversely cutting through the strip somewhat beyond the legs of said U-shape cut so as to produce strip portions, said drum further comprising folding means for said strip portions.
REFERENCES:
patent: 2952299 (1960-09-01), Finke
patent: 3729361 (1973-04-01), Westlake, Jr.
patent: 3893884 (1975-07-01), Class
patent: 4065344 (1977-12-01), Weist
patent: 4114520 (1978-09-01), Achelpohl et al.
patent: 4115183 (1978-09-01), Achelpohl et al.
patent: 4198259 (1980-04-01), van der Meulen
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