| 摘要 |
A device for winding threads on a spool, comprises a spool spindle, a guiding roller, and a changing unit including two rotors driven in opposite direction and each provided with at least two propeller-like wings, the rotors having axes located with a small distance parallel near one another, the rotors being rotatable in rotary planes in which the wings of the rotors rotate and which are spaced from one another by a small distance d, the changing unit being formed so that a thread running at end points of the changing region forms with the rotary planes an acute angle alpha , the rotors being arranged so that an axis of one of the rotors whose wings rotate in a rotary plane spaced farther from the guiding roller is offset back in direction perpendicular to an axis of the guiding roller by the magnitude a=dxcot alpha relative to the axis of the other of the rollers.
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