High speed contact sealer

B - Operations – Transporting – 31 – B

Patent

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93/48

B31B 1/26 (2006.01)

Patent

CA 2002894

Apparatus for the high speed manufacture of elongated tubular film products from lengths of flexible, flat films. Film is unspooled, passed over a forming collar, and onto a tube. On the tube, the film has a circular cross-section, with overlapped edges. A sizing ring correctly sizes the overlap. The film is immediately fed into a heating unit, where a closed-loop band contacts the overlap and heats the film to form a sealed seam. The film is advanced through the heating unit by boggie mounted drive belts. From the heating unit, the film is advanced into accumulation adjacent a casing brake.

Installation pour la production intensive de pellicules tubulaires à partir de pellicules en feuilles minces et flexibles. La pellicule est débobinée, passée sur un collier de formage et enfilée sur un tube. Sur le tube, la pellicule présente une section circulaire avec extrémités en chevauchement. Une bague de découpage dimensionne le chevauchement des extrémités. La pellicule est immédiatement acheminée vers une section de chauffage, où une bande en boucle fermée vient en contact avec la zone de chevauchement et forme un joint thermosoudé. La pellicule est ensuite acheminée hors de la section de chauffage par une bande d'entraînement montée sur galets. De la section de chauffage, la pellicule est acheminée vers un point d'accumulation situé à proximité d'une machine à plier.

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