A method of winding bulked continuous filament yarn is disclosed, which enables superior yarn package formation, including higher density packages with excellent shape and yarn takeoff characteristics. The method uses unique helix angles and winding profiles in a non-adjacent and adjacent yarn pattern, achieved by a unique winding control strategy that constantly monitors spindle speed, desired wind ratio, traverse cam speed, and surface speed.

A method of winding bulked continuous filament yarn is disclosed, which enables superior yarn package formation, including higher density packages with excellent shape and yarn takeoff characteristics. The method uses unique helix angles and winding profiles in a non-adjacent and adjacent yarn pattern, achieved by a unique winding control strategy that constantly monitors spindle speed, desired wind ratio, traverse cam speed, and surface speed.

The method for producing bindings includes: positioning at least one binding bobbin on a machine having: a winding bobbin including a device for supporting and a notch, an electric motor which is coupled to the winding bobbin; and at least one shaft capable of receiving a binding bobbin, supporting a free end of the binding of the binding bobbin on the winding bobbin, by the device for supporting; supplying electricity to the electric motor of the machine to drive the winding bobbin in rotation, so as to wind the binding of the binding bobbin over a plurality of turns around the winding bobbin; stopping the supply of electricity to the electric motor of the machine; and in the region of the notch of the winding bobbin, cutting the plurality of turns of bindings wound onto the winding bobbin.

The method for producing bindings includes: positioning at least one binding bobbin on a machine having: a winding bobbin including a device for supporting and a notch, an electric motor which is coupled to the winding bobbin; and at least one shaft capable of receiving a binding bobbin, supporting a free end of the binding of the binding bobbin on the winding bobbin, by the device for supporting; supplying electricity to the electric motor of the machine to drive the winding bobbin in rotation, so as to wind the binding of the binding bobbin over a plurality of turns around the winding bobbin; stopping the supply of electricity to the electric motor of the machine; and in the region of the notch of the winding bobbin, cutting the plurality of turns of bindings wound onto the winding bobbin.

The invention concerns an improved yarn package and a method winding a package of high Young's modulus yarn. The package has a low normalized standard deviation in unwinding tension and hence is very suitable for converting into a range of yarn constructions and particularly medical products.

The invention concerns an improved yarn package and a method winding a package of high Young's modulus yarn. The package has a low normalized standard deviation in unwinding tension and hence is very suitable for converting into a range of yarn constructions and particularly medical products.

An apparatus for winding filamentary material includes a mandrel rotatable about a spindle axis of rotation and a traverse reciprocating at a distance with respect to the spindle axis to wind the filamentary material in a figure-eight coil configuration with a payout hole extending radially from the inner to the outer wind of the coil. The apparatus includes a measurement device for measuring the diameter of the coil as it is being wound around the mandrel, and a controller for controlling the reciprocating movement of the traverse with respect to the rotation of the mandrel based on the measured diameter of the coil. The measurement device may include a first sensor configured to measure a length of filamentary material wound about the mandrel and a second sensor configured to measure an angular displacement of said mandrel during the winding of the length of filamentary material about said mandrel.

An apparatus for winding filamentary material includes a mandrel rotatable about a spindle axis of rotation and a traverse reciprocating at a distance with respect to the spindle axis to wind the filamentary material in a figure-eight coil configuration with a payout hole extending radially from the inner to the outer wind of the coil. The apparatus includes a measurement device for measuring the diameter of the coil as it is being wound around the mandrel, and a controller for controlling the reciprocating movement of the traverse with respect to the rotation of the mandrel based on the measured diameter of the coil. The measurement device may include a first sensor configured to measure a length of filamentary material wound about the mandrel and a second sensor configured to measure an angular displacement of said mandrel during the winding of the length of filamentary material about said mandrel.

An apparatus for winding filamentary material includes a mandrel rotatable about a spindle axis of rotation and a traverse reciprocating at a distance with respect to the spindle axis to wind the filamentary material in a figure-eight coil configuration with a payout hole extending radially from the inner to the outer wind of the coil. The apparatus includes a measurement device for measuring the diameter of the coil as it is being wound around the mandrel, and a controller for controlling the reciprocating movement of the traverse with respect to the rotation of the mandrel based on the measured diameter of the coil. The measurement device may include a first sensor configured to measure a length of filamentary material wound about the mandrel and a second sensor configured to measure an angular displacement of said mandrel during the winding of the length of filamentary material about said mandrel.

An apparatus for winding filamentary material includes a mandrel rotatable about a spindle axis of rotation and a traverse reciprocating at a distance with respect to the spindle axis to wind the filamentary material in a figure-eight coil configuration with a payout hole extending radially from the inner to the outer wind of the coil. The apparatus includes a measurement device for measuring the diameter of the coil as it is being wound around the mandrel, and a controller for controlling the reciprocating movement of the traverse with respect to the rotation of the mandrel based on the measured diameter of the coil. The measurement device may include a first sensor configured to measure a length of filamentary material wound about the mandrel and a second sensor configured to measure an angular displacement of said mandrel during the winding of the length of filamentary material about said mandrel.