B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
B65B 51/22 (2006.01) B29C 65/02 (2006.01) B65B 7/28 (2006.01)
Patent
CA 2465781
A method for induction sealing a plastic part (24) to a composite container (12) using a pair of linear coils (30, 32) electrically connected to low frequency generators. The linear coils (30, 32) produce overlapping electromagnetic fields on either side of the container (12). Rotating the container (12) assures even heating of the polyethylene liner and plastic part (24). The method produces a reliable seal between the liner and plastic part (24) and can be used at high production speeds.
L'invention concerne un procédé de thermoscellage par induction d'une partie en plastique (24) sur un conteneur composite (12) au moyen d'une paire de bobines linéaires (30, 32) reliées électriquement à des générateurs basse fréquence. Ces bobines linéaires (30, 32) produisent des champs magnétiques se chevauchant, sur les deux côtés du conteneur (12). La rotation du conteneur (12) assure un chauffage uniforme de la gaine polyéthylène et de la partie en plastique (24). Le procédé selon l'invention permet de produire un joint fiable entre la gaine et la partie en plastique (24), et il peut être utilisé à une vitesse de production élevée.
Boatwright Floyd
Braddock Charles
Lowry James
Morrow J.
Rea Keith
Osler Hoskin & Harcourt Llp
Sonoco Development Inc.
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