Abstract
On studying of the structure and the shape of the yarn-package, it is necessary to measure the internal pressure of the package during winding. A paper strain gauge and a miniature load cell is used for measurement. The measured internal pressure is a partial pressure on the bobbin and in the yarn layer of the package.
Because of difficulties to use ordinary R. T. winder or universal type winder for measurement, a trial winder is made for this experiment. The bobbin set on this winder does not rotate but yarn is wound around the bobbin by a flyer. Further, this winder is able to wind up yarn with constant speed by the two non-step speed regulator and it functionate effectually for the purpose. This paper shows mainly technical methods for measuring internal pressure and some results of experiment.
