Apparatus for constructing a pin seam in a fabric having...

D - Textiles – Paper – 03 – D

Patent

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D03D 15/00 (2006.01) D21F 1/00 (2006.01) D21F 1/10 (2006.01)

Patent

CA 2212253

A shed formation device with a frame assembly having at least two harnesses mounted for movement in the frame. Each harness includes a plurality of heddles through which cross machine direction (CMD) yarns are passed. The existing CMD yarns of the fabric pass over an out-feed bar mounted to the frame assembly as they exit the heddles. A replacement CMD yarn supply provides replacement CMD yarns to the heddles for reweaving with the machine direction (MD) yarns to form seam loops and finished fabric ends. The replacement CMD yarns pass over an in-feed bar, mounted to the frame assembly, prior to passing through the heddles. The harnesses are manipulated to form an unweaving shed in the existing CMD yarns and re-weaving shed in the replacement CMD yarns. Retractable expansion forks assist the unweaving and reweaving of the MD yarns. A leasing device captures MD yarns from the unweaving shed and releases them into the reweaving shed to form seam loops and finished ends. - 19 -

Cette invention concerne un dispositif de formation de foule comportant un bâti ayant au moins deux harnais mobiles à l'intérieur du bâti. Chaque harnais comporte une pluralité de lisses dans lesquelles passent les fils de trame. Les fils de trame existants du tissu passent en quittant les lisses sur une barre de sortie montée sur le bâti. Un alimentateur de fil de trame de remplacement achemine des fils de trame de remplacement vers les lisses de retissage avec les fils de chaîne pour former des mailles d'épinglage et des extrémités de tissu finies. Les fils de remplacement passent avant de passer dans les lisses sur une barre d'entrée montée sur le bâti. Les harnais sont manipulés pour former une foule de détissage dans les fils de trame existants et une foule de tissage dans les fils de trame de remplacement. Un dispositif envergeur capture les fils de chaîne dans la foule de détissage et les libère dans la foule de retissage pour former des mailles d'épinglage et des extrémités finies. - 19 -

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