Method and apparatus for plug loosening after texturing
OwnerPeter Grossenbacher, Werner Nabuloninventors
Life of this patent
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Abstract
A textured yarn is directed through a path in which the textured yarn plug forms a loop in which the direction of the yarn plug is changed and the speed of the yarn plug is increased via a draw-off bobbin. The yarn plug within the loop is loosened and the resulting yarn is stretched to form a yarn which can be wound up. The deflection loop in which the yarn plug is loosened is stable depending upon an appropriate choice of speeds between the speed at which the plug is guided into the loop and the speed at which the yarn is drawn from the loop. The deflection loop need not be supported by any mechanical devices.
Claims21
In a method of producing a textured thermoplastic yarn the steps of
- forming a textured yarn plug in a texturing means;
- moving the textured yarn plug in a first direction at a first speed;
- and
- thereafter forming a free unguided loop of said yarn plug while changing the direction of movement of the yarn plug into a second direction and simultaneously increasing the speed of the yarn plug to a second speed sufficient to straighten the yarn plug.
An apparatus for texturing a thermoplastic yarn comprising
- a texturising means for texturing a moving thermoplastic yarn into a textured yarn plug;
- a cooling means for cooling the yarn plug extending from said texturizing means and releasing the yarn plug therefrom with the yarn plug moving in a first direction and at a first speed;
- and
- a draw-off means for drawing-off the yarn plug from said cooling means to pull the yarn plug into a straightened yarn, said draw-off means being disposed relative to said cooling means to form a free unguided loop of one of the yarn plug and yarn while changing the direction of movement of one of the yarn plug and yarn to a second direction in a free unguided manner while increasing the speed of the yarn to a second speed sufficient to straighten the yarn plug therebetween.
An apparatus for texturing a thermoplastic yarn comprising
- a texturing means for texturing a moving thermoplastic yarn into a textured yarn plug;
- a ventilated housing for passage of air therethrough, said housing having an inlet for receiving a downwardly directed yarn plug from said texturing means with the yarn plug moving freely in a first direction and at a first speed and an outlet for passage of a yarn from the yarn plug in a direction different from said first direction;
- and
- a draw-off means for pulling the yarn from said outlet of said housing to pull the yarn plug into a straightened yarn, said draw-off means being operable to increase the speed of the yarn to a second speed sufficient to straighten the yarn extending from the yarn plug wherein the yarn plug forms a free unguided loop in said housing.
An apparatus for texturing a thermoplastic yarn comprising
- a texturising means for texturing a moving thermoplastic yarn into a textured yarn plug;
- cooling means for cooling the yarn plug extending from said texturing means with the yarn moving in a first direction and at a first speed;
- means for releasing the textured yarn plug at variable positions from said cooling means;
- and
- a draw-off means for drawing off the yarn plug from said cooling means, said draw-off means being horizontally spaced from said cooling means and being operable to increase the speed of the yarn thereat to a second speed sufficient to straighten the yarn plug between said cooling means and said draw-off means while allowing the direction of movement of one of the yarn plug and yarn to change to a second direction in a free unguided manner.
Dependencies are inferred from the claim text.