Method and apparatus for forming reserve windings during a bobbin change on a spinning machine
AssigneeRieter Machine Works, Ltd.
InventorAndre Lattion
Life of this patent
Estimating the term…
Abstract
A suction means and a severing means are located behind the friction drive drum to receive a yarn when the bobbin holder is lifted into a idling position and to sever the yarn when the holder is returned to the operating position with a fresh tube in place. The suction means and severing means are actuated via the holder and are positioned to one end of the fresh tube so that the short yarn end can be wound onto the tube in a reserve winding zone. The yarn is thereafter moved into the usual yarn traversing zone of the tube to form a bobbin.
Claims25
A method of forming reserve windings during a bobbin change on a spinning machine wherein a wound bobbin is removed from the machine and an empty tube is placed in the machine comprising the steps of
- lifting the wound bobbin from an operating position to an idling position for making a bobbin change;
- continuously supplying yarn from a spinning device during said bobbin change;
- displacing the continuously supplied yarn transversely of the wound bobbin into a reserve winding path;
- holding the displaced yarn under a suction force at a first position while doffing the wound bobbin and thereafter donning the empty tube;
- lowering the empty tube into said operating position while simultaneously clamping the yarn at a second position upstream of said first position;
- thereafter winding the yarn for a plurality of reserve windings onto the empty tube in a reserve winding zone to impart a sufficient tension in the yarn between said second position and the tube to rupture the yarn therebetween and to form a short yarn end for winding into the reserve windings;
- and
- thereafter moving the supplied yarn from said reserve winding zone transversely of the tube into a yarn winding zone of the tube spaced laterally from the reserve winding zone to build a bobbin.
An apparatus for forming reserve windings comprising
- a holder for removably receiving a tube for winding of a bobbin thereon, said holder being pivotally mounted between an operating position and an idling position above said operating position;
- a friction drive drum mounted adjacent said operating position for driving a tube removably mounted in said holder;
- a spinning device for supplying a yarn between said friction drive drum and said holder;
- a yarn suction means positioned downstream of said friction drive drum relative to the supplied yarn for holding the yarn under suction, said suction means being positioned below said holder and including means in the path of said holder for terminating the suction of said suction means on a held yarn movement of said holder towards said operating position;
- and
- a yarn severing means positioned downstream of said friction drive drum relative to the supplied yarn for severing a yarn held under suction in said yarn suction means to produce a short yarn end, said yarn severing means being positioned below and in the plane of said holder and including means in the path of the holder for actuating said yarn severing means upon movement of said holder towards said operating position to sever a yarn.
An apparatus for forming reserve windings comprising
- a holder for removably receiving a tube for winding of a bobbin thereon, said holder being pivotally mounted between an operating position and an idling position above said operating position;
- a friction drive drum mounted adjacent said operating position for driving a tube removably mounted in said holder;
- a spinning device for supplying a yarn between said friction drive drum and said holder;
- a yarn suction means positioned downstream of said friction drive drum relative to the supplied yarn for holding the yarn under suction at a first position;
- and
- means mounted on said holder for selectively clamping the yarn in a second position between said first position and a tube on said holder with said holder in said operating position.
Dependencies are inferred from the claim text.