An apparatus and a method for handling the unwinding end of a wound body of yarn by releasing the end from adjacent winds of the yarn and, with the bobbin rotating, picking up and carrying the released end in a stream of air flowing into a suction nozzle. Lips of the suction nozzle automatically conform to the configuration of the body of yarn. One of the lips may engage the body to aid in releasing the end from the body and providing an air seal, and the other lip may be spaced from the body, thus providing more effective flow of the stream across the body to pick up the unwinding end. If desired, both lips may be spaced from the body of yarn. The unwinding end from the body of yarn, and a nozzle, as described above, if desired, may be provided for withdrawing the unwinding end.
The combination with an end finding nozzle adapted to be supported adjacent the surface of the yarn package on which an end is to be found, spaced parallel lips mounted on the nozzle at the mouth for linear and angular movement relative thereto, and spring members biasing said lips to extend them relative to the mouth of the nozzle.
An angular comb for application to suction nozzles for seizing the end of yarns wound in the form of packages, which is formed from a flat plate by precision cutting followed by bending, and comprises toothing having a height/pitch ratio of between 2.5 and 3.5 and having narrow V-shaped lead-ins between the teeth.
A yarn end finding device in which a yarn end suction opening part of a suction mouth for leading out a yarn end on a surface of a yarn layer on a spinning bobbin by an action of a suction air flow can be moved on the basis of the difference in the yarn layer diameter of the spinning bobbins to be treated.
Method and apparatus for picking up an end yarn so as to fix the same on a yarn package comprising picking up an end yarn from a yarn package by a suction device so as to hold the end yarn therein in a drawn state, inserting an end yarn handling bar between the held end yarn and the package surface, revolving the yarn end handling bar along the package surface while maintaining the bar beneath an outermost yarn layer connected to the yarn end until a layered portion is formed, in which the yarn end held in a drawn state coincides with the outermost yarn layer, and ejecting a jet of pressurized fluid onto or in the vicinity of the layered portion so as to entangle the yarn end with the outermost yarn layer so that the yarn end is fixed on the package.
A method for fastening a yarn end (2) on a bobbin (1), comprises placing the bobbin (1) horizontally on two spaced supports which support the bobbin along two lines parallel to the axis of the bobbin. A partial vacuum is created in a space located near the bobbin (1), the partial vacuum being sufficient to suck the non-fastened yarn end (2) into that space. The bobbin is caused to rotate in order to wind the non-fastened yarn end (2) on the bobbin. The yarn end (2) is fastened on the bobbin (1). While step (b) is being performed, the bobbin (1) is rotated at the same time in order to unwind the non-fastened yarn end (2) so that this end can engage by suction to a sufficient extent within the space located near the bobbin (1).
