Endless power transmission belt construction, cord therefor...

D - Textiles – Paper – 02 – G

Patent

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D02G 3/44 (2006.01) B29D 29/10 (2006.01) D02G 3/28 (2006.01) F16G 1/10 (2006.01) F16G 5/06 (2006.01) F16G 5/08 (2006.01)

Patent

CA 2201465

An endless power transmission belt construction, cord therefor and methods of making the same are provided, the cord having the yarns and the plies thereof respectively twisted on a 2 for 1 twister so as to cause the longitudinal axes of the fiber filaments to be disposed generally in the longitudinal direction of the cord with the denier of the fiber filaments of each yarn being approximately 1500. The twist multiplier of the three plies is 3.7687 as the plies are twisted together at a rate of approximately 2.9 turns per linear inch of the cord, and the twist multiplier for the two yarns is 3.6765 as the two yarns for each ply are twisted together at a rate of approximately 4.9 turns per linear inch of that ply. The twist multiplier for five plies is 3.6986 as the plies are twisted together at a rate of approximately 1.8 turns per linear inch of the cord, and the twist multiplier for three yarns is 3.5838 as the three yarns for each ply are twisted together at a rate of approximately 3.9 turns per linear inch of that ply. The fiber filaments comprise p-aramid that comprises co-poly (paraphenylene/3,4' oxydiphenylene terephthalamide).

Fabrication d'une courroie de transmission, câblé et méthodes de fabrication de ladite courroie. Les fils et les plis du câblé sont respectivement torsadés sur une tordeuse 2 à 1, de manière à ce que les axes longitudinaux des filaments fibreux soient orientés dans le sens longitudinal du câblé, le denier des filaments de fibre de chaque fil étant environ de 1 500. Le multiplicateur de retors de la courroie à trois plis est de 3,7687, les plis étant tordus ensemble à un rythme de 2,9 tours par pouce linéaire de câblé, tandis que le multiplicateur de retors de la courroie à deux plis est de 3,6765 car les deux fils de chaque pli sont torsadés ensemble à un rythme d'environ 4,9 tours par pouce linéaire du pli. Le multiplicateur de retors pour une courroie à cinq plis est de 3,6986 car les plis sont torsadés ensemble à un rythme d'environ 1,8 tour par pouce linéaire de câblé. Le multiplicateur de retors pour une courroie à trois plis est de 3,5838 car les trois fils de chaque pli sont torsadés ensemble à un rythme d'environ 3,9 tours par pouce linéaire de chaque pli. Les filaments de fibre comprennent p-aramide qui est constitué de co-poly (paraphénylène/3,4' téréphthalamide d'oxydiphénilène).

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