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AssigneeW. Schlafhorst AG & Co.
InventorsHans-Werner Schwalm, Maximilian Preutenborbeck, Johannes Thomalla
Estimating the term…
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.
A method for forming a yarn reserve on an end surface of a cross-wound bobbin or cheese disposed on a bobbin tube having ends, which comprises predetermining a length of yarn for a yarn reserve;
In an apparatus for changing cross-wound bobbins or cheeses on a machine that produces cross-wound bobbins or cheeses, an apparatus for forming a yarn reserve on an end surface of a cross-wound bobbin or cheese disposed on a bobbin tube having ends, comprising a drive mechanism for unwinding only a predetermined length of a yarn from a cheese without cutting the yarn while the cheese is rotatably supported on a creel, means in the form of a suction tube mounted displaceably relative to said drive mechanism for receiving and storing the unwound yarn from the cheese, means for displaceably mounting the suction tube relative to said drive mechanism, yarn guide means operatively associated with said suction tube for positioning the unwound yarn in the vicinity of and depositing the yarn on one of the ends of a bobbin tube, at least one sensor disposed in at least one of said yarn guide means and said suction tube, said sensor forming means for detecting and measuring the predetermined length of the yarn received in said suction tube, and a control device connected to said at least one sensor for controlling said drive mechanism.
Dependencies are inferred from the claim text.