High speed pleating apparatus

D - Textiles – Paper – 06 – J

Patent

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Details

D06J 1/10 (2006.01) B29C 53/26 (2006.01) B31F 1/22 (2006.01) D04H 1/54 (2006.01)

Patent

CA 2082925

Disclosed is an apparatus (15) for longitudinally pleating a moving lamina (10). The apparatus (15) features a curved axis roll (40) having a stationary axis circumscribed by a rotating sleeve with a plurality of circumferentially oriented grooves (44) in the rotating sleeve. The pleats are produced by the intermeshing of the lamina (10) with the grooves (44) of the rotating sleeve. Preferably a complementary curved axis roll (60), having lands which interdigitate with the grooves of the first roll is used in conjunction with the first curved axis roll (40). The apparatus (15) preferably further comprises a third curved axis roll (30) disposed upstream of the first curved axis roll (40) to substantially equalize the paths of travel of any points on the moving lamina (10) by compensating for differences in the paths of travel between the edges (12) and centerline of the lamina. The apparatus may further comprise two straight axis rolls (20, 50) disposed outboard of the curved axis rolls and spatially arranged so that the paths of travel of either edge (12) of the lamina (10) and the centerline of the lamina through the apparatus and from the first straight axis roll to the second straight axis roll are substantially equal.

La présente invention concerne un dispositif (15) servant à plisser un matériau en feuille (10) dans le sens de la longueur et en continu. Le dispositif (15) est constitué d'un cylindre à axe courbe (40) comportant un axe stationnaire entouré d'un manchon rotatif présentant des rainures annulaires (44). Les plis sont formés par pénétration de la feuille (10) dans les rainures (44). De préférence, le dispositif (15) comporte un cylindre à axe courbe complémentaire (60), présentant des saillies qui s'imbriquent dans les rainures du premier cylindre (40). Le dispositif (15) comporte de préférence un troisième cylindre à axe courbe (30), situé en amont du premier cylindre (40), et servant à égaliser la distance parcourue par tous les points de la feuille (10), en compensant pour les différences de distance parcourue par les bords (12) et le centre de la feuille. Le dispositif (15) peut aussi comporter deux cylindres à axe droit (20, 50) disposés de manière que la distance totale parcourue par les côtés (12) et le centre de la feuille (10) lors du passage d'un bout à l'autre du dispositif soit sensiblement la même.

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