Textiles: spinning – twisting – and twining – Apparatus and processes – With preparation for doffing- or donning-type operation
Patent
1994-05-12
1995-06-27
Hail, III, Joseph J.
Textiles: spinning, twisting, and twining
Apparatus and processes
With preparation for doffing- or donning-type operation
242 18EW, 242 356E, D01H 914, B65H 5422, B65H 6708
Patent
active
054269296
ABSTRACT:
A method for forming a yarn reserve on an end surface of a cross-wound bobbin or cheese disposed on a bobbin tube includes predetermining a length of yarn for a yarn reserve. The yarn is unwound to the predetermined length from a cheese while temporarily storing the yarn in a reservoir. The presence of the yarn in the reservoir is detected with a sensor. The unwinding of the yarn is stopped and the rotational direction of the cheese is reversed to the given winding direction after attaining the predetermined length of the yarn. The yarn is then wound onto the one end of the bobbin tube while continuously holding the yarn taut with a restraining force of the reservoir. An apparatus for changing cheeses on a machine that produces cheeses and for forming a yarn reserve on an end surface of a cheese disposed on a bobbin tube includes a drive mechanism for unwinding a predetermined length of a yarn from a cheese. A reservoir receives and stores the yarn from the cheese. A yarn guide positions the yarn in the vicinity of and deposits the yarn on one of the ends of the bobbin tube. At least one sensor is disposed in at least one of the yarn guide and the reservoir for detecting the received yarn. A control device is connected to the at least one sensor for controlling the drive mechanism.
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Preutenborbeck Maximilian
Schwalm Hans-Werner
Thomalla Johannes
Greenberg Laurence A.
Hail III Joseph J.
Lerner Herbert L.
W. Schlafhorst AG & Co.
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