B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 19/34 (2006.01) B29C 53/58 (2006.01) B31C 3/00 (2006.01) B65D 19/00 (2006.01)
Patent
CA 2234079
The present invention relates to a method for the production of cardboard tubes with rectangular cross section. The method is characterized in that layers of cardboard coated with thermoplastic are heated and joined to each other by winding in spiral around a rectangular core during simultaneous formation of a tube. The invention relates also to an arrangement for the achievement of the method, characterized in that it includes a first means (20) for the heating of a number of layers (16) of carboard coated with thermoplastic and a second means (30) for winding and formation of the heated layers to tube (40).
La présente invention concerne un procédé de production de tubes de carton à section rectangulaire. Le procédé consiste à chauffer des couches de carton enduites de matière thermoplastique et à les joindre en les enroulant en spirale autour d'un mandrin rectangulaire formant ainsi le tube. L'invention concerne également un dispositif de mise en oeuvre du procédé. La caractéristique de ce dispositif est de comporter un premier organe (20) permettant de chauffer plusieurs couches (16) de carton enduites de matière thermoplastique et un second organe (30) permettant l'enroulement et le formage en tube (40) des couches chauffées.
Andreasson Ingmar
Borden Ladner Gervais Llp
Lattpallen Sverige Ab
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