Heat-seal splicing assembly and method

Details Heat-seal splicing assembly and method Heat-seal splicing assembly and method

B - Operations, Transporting

65

H

B65H 19/14 (2006.01) B29C 65/22 (2006.01) B65H 19/18 (2006.01) B29C 65/74 (2006.01)

Patent

CA 2219350

A method and web splicing assembly (12) for heat-seal splicing together a trailing end of running first, two-sided plastic material web (28) and a leading end of a second, two-sided plastic material web (34), and then for heat-seal splicing together a leading end of third, two-side plastic material web (42) and the trailing of the then running, second web (34). The web splicing assembly (12) includes first and second splicing subassemblies (14, 16). Both sub-assemblies (14, 16) have relatively movable slide bars (112) and relatively fixed nip bars (84). The subassemblies are each movable between a first position and a second position. Each slide bar (112) carries a heated wire (146) that heat-severs the clamped web portions along a localized area that extends across the web portion and heat-seals parts of the clamped web portions together adjacent to the area.

Procédé et ensemble (12) de raccordement de bandes permettant de raccorder par thermosoudage une extrémité arrière d'une première bande (28) circulante de matière plastique à deux faces et une extrémité avant d'une deuxième bande (34) de matière plastique à deux faces, et ensuite de raccorder par thermosoudage une extrémité avant d'une troisième bande (42) de matière plastique à deux faces et l'extrémité arrière de la deuxième bande (34), alors circulante. L'ensemble (12) de raccordement de bandes comporte des premier et second sous-ensembles (14, 16) de raccordement. Les deux sous-ensembles (14, 16) possèdent des barres coulissantes (112) mobiles relativement et des barres (84) de contact fixes relativement. Lesdits sous-ensembles sont tous deux mobiles entre une première et une seconde position. Chaque barre coulissante (112) porte un fil chauffé (146) qui sépare thermiquement les parties de bande pressées le long d'une zone localisée qui s'étend sur la partie de bande et thermosoude ensemble des parties des portions de bande pressées de manière adjacente à ladite zone.

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