Apparatus for controlling tension in a traveling yarn

Textiles: manufacturing – Warp preparing or handling – With means responsive to sensed condition

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226118, 242 755, B65H 5900, D02H 1314

Patent

active

049843419

ABSTRACT:
Apparatus for controlling tension in a traveling yarn includes sequential yarn-engaging driven and idler rolls, the driven roll having a stationary rotational axis and the rotational axis of the idler roll being movable in a defined path responsive to tension variations in the traveling yarn, a piston-and-cylinder biasing assembly for urging the idler roll into yarn tensioning engagement, and a potentiometer for sensing tension-responsive movement of the idler roll and operatively associated with the driven roll for varying its yarn driving speed to compensate for such tension variations. In one embodiment, the idler roll follows a horizontal path of movement and is spaced considerably from the driven roll for functioning as a yarn accumulator. In a second embodiment, the idler roll pivots through an arcuate path of movement centered about the driven roll.

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"Draw-Warping--Draw-warping and draw-warp-sizing system for POY and undrawn yarns", Man-Made Fiber Year Book (CTI) pp. 108-110, Date Unknown.
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"New Systems for Draw-Beaming POY Yarns"; Fiber World, Sep., 1984, pp. 61-68.

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