Method of automatically separating a roving upon removal of a bobbin from a roving frame
AssigneeZinser Textilmaschinen GmbH
InventorFranz MacHnik
Life of this patent
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Abstract
A full bobbin before removal from a roving machine has a roving broken between the bobbin body and the pressing finger bed of the flyer by initially winding the roving around the tube above the upper cone and then generating a roving reserve from at least half a turn on the upper winding cone and the body. The roving reserve between the fastening turns and the pressing finger bed is then partly unwound to form a weak spot along the roving reserve and the pressing finger bed is then moved a certain amount along the bobbin periphery and the roving is broken at the weak spot by a further movement of the pressing finger bed.
Claims8
A method of automatically parting a roving upon removal of a full roving bobbin from a roving flyer frame in which the roving bobbin is wound on a roving tube with upper and lower winding cones having a wound body between them as the tube is rotated and the roving is delivered by a flyer from a pressing finger bed of the flyer resting on a surface of the wound body of the bobbin, said method comprising the steps of:
- (a) generating at least half a turn of roving and a roving reserve above the bobbin by a forward rotation of the bobbin following completion of the bobbin and while retaining the roving with said pressing finger bed;
- (b) unwinding the roving reserve by a reverse rotation of said bobbin to form a weakened location along said roving at a certain distance from said pressing finger bed;
- (c) moving the pressing finger bed by a predetermined amount along a periphery of the bobbin;
- and
- (d) pulling on said roving by movement of said pressing finger bed, thereby parting said roving at said location.
Dependencies are inferred from the claim text.