Yarn winding onto cross and cone bobbin - at constant speed from texturising machine without rewinding

摘要

Yarn is fed at constant speed onto a conical shaft to form a cross-and-cone wound bobbin. A pair of yarn take-up shafts feed yarn at constant speed. A vacuum receptacle receives yarn and temporarily accumulates it. This receptacle consists of a holding chamber, suction chamber, a device that measures the filling in the holding chamber and a sepg. wall between the two chambers. The wall has two rows of yarn loop forming parts. A conical support shaft receives yarn from the holding chamber and conical drive shaft winds the yarn on the support shaft. The shafts have axis at an acute angle to each other and a controller displaces the conical support shaft relative to the drive shaft to compensate for the varying dias. of the conical bobbin yet still maintain the same feed rate. Yarn is wound at constant speed from a non-spinning frame in a yarn texturising machine into a cross-and-cone bobbin. Ordinarily in this operation it would have wound into a cross-and-cylinder bobbin and then rewound. Thus by this method rewinding is avoided and good quality bobbins are obtd.