B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
154/29.04
B65B 61/18 (2006.01) B29C 65/00 (2006.01) B29C 65/02 (2006.01) B29C 65/78 (2006.01) B31B 1/90 (2006.01)
Patent
CA 1243926
ABSTRACT A packing container of the non-returnable type is frequently manufactured from laminated material which comprises a central carrier layer of paper with thermoplastic layers applied to both sides. As an opening arrangement a pre-punched pouring opening is used which is covered on the one hand by a tear-off cover strip (pull-tab) located outside the packing container, on the other hand by an inner protective strip. A method for sealing an emptying opening in accordance with the invention ensures that a part of the inner protective strip corresponding to the shape and size of the pouring opening accompanies the cover strip owing to the strips as they are applied being heat-sealed to each other at the same time as they are pressed against each other by means of pressure fluid. An arrangement for the realization of the method comprises a heating device with a heatable zone and an outlet for pressure fluid.
470230
Arnspang Bengt-Arne
Lagerstedt Jan E.r.
Aktiebolaget Tetra Pak
Marks & Clerk
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