B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 55/10 (2006.01) B29C 55/20 (2006.01)
Patent
CA 2757434
The invention relates to a device for stretching film sections in a monoaxial or biaxial manner, preferably by way of a tenter frame, for films made substantially of polymers, wherein a square or rectangular section of a such film is seized at 4 sides by at least two tenter hooks each, designed as regards improved stretching such that the upper tenter hook part (11) is mounted in an articulated fashion on a rotational axis located outside the film to be stretched, and specifically such that the lower, fixed tenter hook part (13) carries the joint, while the upper tenter hook part (11) is designed so as to pivot upwards and at least one cylinder (14) is disposed rotated by 90° for applying the tensioning power and thus applies the tensioning power to the upper pivotable tenter hook part (11).
L'invention concerne un dispositif d'étirage monoaxial ou biaxial de sections de feuilles, de préférence au moyen d'un cadre d'étirage, pour des feuilles sensiblement constituées de polymères. Une découpe carrée ou rectangulaire d'une telle feuille est saisie sur quatre côtés, chaque côté étant saisi par au moins deux pinces. Pour améliorer l'étirage, le dispositif est configuré de telle sorte que la partie de pince supérieure (11) est montée articulée sur un axe de rotation situé à l'extérieur de la feuille à étirer, et de sorte que la partie de pince inférieure (13) fixe supporte l'articulation, tandis que la partie de pince supérieure (11) est conçue pivotante vers le haut, au moins un cylindre (14) étant tourné à 90 degrés pour l'application de la force de serrage et appliquant la force de serrage sur la partie de pince (11) supérieure pivotante.
Benoit & Cote Associes Inc.
Dr. Collin Gmbh
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