| 摘要 |
This invention provides a machine for efficiently laying out biased arrays of yarns. The machine combines on a single supporting machine frame (1) two mechanically driven continuous yarn carrier strips, each provided on its edge facing the other carrier strip with a plurality of spaced yarn restrainers, and (2) a reciprocating conveyor capable of conveying a small array of spaced parallel yarns, oriented at an angle to the motion of the carrier strips between 10 DEG -80 DEG , back and forth between the two carrier strips in such a manner that the yarns will be held on the restrainers at each pass of the conveyor. Continuous yarns are supplied by conventional means under constant low tension to the input of the conveyor. The relative motions of the carrier strips and the reciprocating conveyor are controlled so that the web of yarns produced is regularly patterned. The best means for generating reciprocal angled motion combines (1) a first sliding carriage free to move back and forth in a direction perpendicular to the direction of motion of the yarn carrier strips, under the urging of a rotating drive bar moving in a slot of this carriage, (2) a second sliding carriage suspended from the first sliding carriage by tracks which allow it to move back and forth in a direction parallel to the direction of motion of the carrier steps, and (3) a guide plate attached to the main machine frame. A projection from the second sliding carriage fits into an angled slot in the guide plate to constrain the motion of the second sliding carriage to the desired path. A device for holding several yarns parallel to each other as they are drawn out is attached to one end of the second sliding carriage.
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