초록 ▼

A yarn withdrawal apparatus is disclosed for temporarily withdrawing a freshly spun and continuously advancing yarn to a waste container when the spinning operation is interrupted, and for thereafter threading the yarn onto the feed godet or winder of the spinning machine. The apparatus includes a y

A yarn withdrawal apparatus is disclosed for temporarily withdrawing a freshly spun and continuously advancing yarn to a waste container when the spinning operation is interrupted, and for thereafter threading the yarn onto the feed godet or winder of the spinning machine. The apparatus includes a yarn advancing means in the form of one or more rolls and which is adapted to have the yarn looped thereabout. Drive means is provided for rotating the roll or rolls of the advancing means, and a suction means is provided for withdrawing the yarn from the advancing means. In one embodiment, the yarn is initially drawn into the suction means, and then looped about the rotating roll of rolls which serve to frictionally engage the yarn and apply a high yarn tension, and so that the yarn is then in condition to be threaded onto the feed godet of the spinning machine. In another embodiment, a pneumatic system is provided which serves to loop the yarn about a single rotating roll and then guide the yarn into the suction means, and so that the roll again serves to impart a high degree of tension to the yarn.

대표청구항 ▼

An apparatus for continuously withdrawing an advancing yarn and comprising a support structure including a housing, yarn advancing means rotatably mounted to said housing of said support structure and comprising a single rotatable roll which is adapted to be looped by the advancing yarn, with said r

An apparatus for continuously withdrawing an advancing yarn and comprising a support structure including a housing, yarn advancing means rotatably mounted to said housing of said support structure and comprising a single rotatable roll which is adapted to be looped by the advancing yarn, with said roll having a first end portion and an opposite second end portion, drive means mounted to said support structure for rotating said roll at a predetermined rotational speed, suction means mounted to said support structure and having an inlet opening closely adjacent said yarn advancing means for withdrawing a yarn which is looped about said roll; and said housing having an interior wall which generally conforms to the surface of said roll with a small gap therebetween, with the width of said gap being greater than the diameter of the yarn, and wherein said housing includes an inlet passage adjacent said first end portion and an outlet passage adjacent said second end portion, and with said outlet passage communicating with said inlet opening of said suction means.