Abstract: A yarn winder in which a fluctuation of winding tension is avoided and the winding characteristics are made uniform from the most inner to the most outer layer. Yarn is wound by a winder in which a spindle 2 having a positively driven pressure roller 5 is positively driven, the pressure roller 5 being positioned so that it is not in contact with a tube 100 immediately after the yarn setting operation. After a predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the yarn layer on the tube 100. The surface speed of the pressure roller 5 is controlled to be higher than that of an empty tube until the yarn is switched to the empty tube, wherein the controlled speed is approximately the same as or lower than the surface speed of a fully loaded tube, and the surface speed of the pressure roller is controlled to be approximately the same as the surface speed of the empty tube after the yarn has been switched to the empty tube.

Abstract: A yarn winder in which a fluctuation of winding tension is avoided and the winding characteristics are made uniform from the most inner to the most outer layer. Yarn is wound by a winder in which a spindle 2 having a positively driven pressure roller 5 is positively driven, the pressure roller 5 being positioned so that it is not in contact with a tube 100 immediately after the yarn setting operation. After a predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the yarn layer on the tube 100.

Abstract: To improve the success rate of yarn switching by reducing the variation of the winding tension during the yarn switching operation, a turret type yarn winder is provided, wherein the upper yarn switching mechanism 8 and the lower yarn switching mechanism 9 are provided at positions wherein, when the empty bobbin 50 held by the spindle 4 is displaced by the rotation of the turret member 2 toward the yarn 60 supported by the respective yarn path restriction guides of the yarn switching mechanisms 8, 9, the circumference of the empty bobbin 50 is brought into contact with the yarn 60 at a contacting angle, which angle increases as the turret member rotates, and wherein the dog portion 30 mounted to the turret member 2 causes the yarn searching guide 25 of the lower yarn switching mechanism 9 to rotate in synchronism with the rotation of the turret member 2, and the guide plate 31 for forming the anchor yarn winding is actuated to move the yarn 60 in the axial direction of the bobbin 50.

Abstract: To reliably carry out the yarn-catching operation and formation of bunch-winding and tail-winding, while using a bobbin having no yarn-catching groove thereon, and obtain a package with a shorter yarn end extended from the bunch-winding part, upstream of a pressure roller 7, a yarn-holding guide 24 is provided for guiding a running yarn to a bunch-winding position; downstream of an empty bobbin 70, a yarn-searching guide 29 is provided for guiding the yarn to the yarn-catching part or a threading guide 33 and a yarn-winding guide 37 movable toward a concave space (A) formed by the pressure roller 7 and the empty bobbin 70 carried on a spindle 4 to guide the yarn 80 running to a full bobbin 70' or others to a yarn-catching part B formed between the abutting end walls of adjacent empty bobbins 70 carried on the spindle 4.

Abstract: A yarn winder in which a fluctuation of winding tension is avoided and the winding characteristics are made uniform from the most inner to the most outer layer. Yarn is wound by a winder in which a spindle 2 having a positively driven pressure roller 5 is positively driven, the pressure roller 5 being positioned so that it is not in contact with a tube 100 immediately after the yarn setting operation. After a predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the yarn layer on the tube 100. The surface speed of the pressure roller 5 is controlled to be higher than that of an empty tube until the yarn is switched to the empty tube, wherein the controlled speed is approximately the same as or lower than the surface speed of a fully loaded tube, and the surface speed of the pressure roller is controlled to be approximately the same as the surface speed of the empty tube after the yarn has been switched to the empty tube.

Abstract: To provide a traverse-motion mechanism capable of easing the threading operation by reducing the heights of the yarn-separating fulcrum and the godet roller disposed upstream of a yarn-traversing fulcrum, of reducing times required for the manufacturing and assembling operation by simplifying the structure due to the reduction of the overall machine height, of minimizing the rise of selvage and ribbon wind generated in a package, and of readily adjusting the position of yarn turning point. A traversing unit 6-1 disposed at one end of the traverse-motion mechanism is offset from a regular position toward another traversing unit 6-4 so that a straight line connecting the opposite traverse ends (A) and (B) in the traversing unit 6-1 with each other is not parallel to an axis of a touch roller 7.