초록

Tailstock device to be applied to the cone-holding arm ( 26) of collection units (3) of spinning stations (1) of open-end spinning machines wherein the quill is engaged by a toothed tailstock provided with a skew pyramidal toothing on the face presented to the base of the quill.

대표청구항 ▼

The invention claimed is: 1. Tail stock device to be applied to a cone-holding arm ( 26) of collection units (3) of spinning stations (1) of open-end spinning machines comprising of a disc (32) and a neck (33) of a diameter such as to receive and hold in position the inside of a quill (28), the per

The invention claimed is: 1. Tail stock device to be applied to a cone-holding arm ( 26) of collection units (3) of spinning stations (1) of open-end spinning machines comprising of a disc (32) and a neck (33) of a diameter such as to receive and hold in position the inside of a quill (28), the peripheral crown of the disc (32 ) constituting the seat for the quill between two tailstocks, characterized in that at least one of the tailstocks (31) is a toothed tailstock provided with a skew pyramidal toothing formed from teeth (34) on the outer face of the neck (33), the teeth (34) having a face (35) inclined with respect to the face of the neck itself and said face being substantially perpendicular to an opposite face (36). 2. Tailstock device according to claim 1, characterized in that said skew pyramidal toothing formed from teeth (34) is made on the periphery of the outer face of the neck (33). 3. Tailstock device according to claim 1, characterized in that said skew pyramidal toothing is applied with a number of teeth ( 34) between 8 and 20. 4. Tailstock device according to claim 1, characterized in that skew pyramidal toothing is formed from teeth (34) having an inclination with respect to face (35) of between 20째 and 50째 with respect to the plane of the outer face of the neck (33) from which they project. 5. Process for stating the collection and depositing of the reserve of thread on the new quill (28) in the collection units (3) of the spinning stations (1) of open-end spinning machines during the lifting cycles carried out through automatic service trolleys characterized in that it comprises the following step in sequence: interposition of the thread (F) between the base of the quill (28) and a toothed tailstock (31), starting in rotation of the new quill (28) with a auxiliary roller (42) of the trolley, closing of the cone-holding arm (26) at the ends of the quill (28), cutting of the thread (F) and depositing of the reserved of thread with the oscillating pad (62'), which carries out traversing to form the reserve of thread, in this step the thread (F) being kept in position engaged by skew pyramidal toothing of a toothed tailstock (31) arranged on the cone-holding arm (26). 6. Process for starting the collection and depositing of the reserve of thread on the new quill according to claim 5, characterized in that the depositing of the reserve of thread is carried out at a reduced speed.