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AssigneeZinser Textilmaschinen GmbH
InventorsJoachim Rohner, Helmut Nickolay
Estimating the term…
A service device in a ring spinning machine is moved after a yarn break to the appropriate spinning position to separate the broken yarn end from the winding by generating an air blast that acts on the yarn end. If the winding build-up is in a stage in which the initial winding cone has not yet been completed, the air blast is set at a high value so that a relatively strong separating force acts on the broken yarn end. If, on the other hand, the build-up of the winding cone has been completed, the separating force acting on the yarn end is less. The stage of the winding build-up is determined with the aid of a switch, which is connected to a stop member that contacts and rests on the ring rail of the spinning position. The setting of the two air blasts is performed by a switchable trottle. Taking into consideration the stage of the winding build-up when setting the air blast that acts on the yarn end assures that the broken yarn end is separated in every instance from the winding, yet prevents loops from being separated at the same time.
A service device for a ring spinning machine for traveling to individual spinning positions to apply an air blast to a broken yarn end to separate it from the previously wound yarn windings at the spinning position, said service device comprising means for detecting the extent of the winding build-up at the spinning position, means to apply an air blast, and means for setting the separating force applied by said air blast on the yarn, said detecting means acting automatically on the setting means to cause said setting means to set a lesser separating force upon detection of a greater extent of winding build-up.
A method for separating a broken yarn end from previously wound yarn windings at a spinning position of a ring spinning machine by means of an air blast which acts on the yarn end with a separating force, in which a service device which generates the air blast is moved to the spinning position, said method comprising detecting the extent of the winding build-up at the spinning position, applying an air blast, and automatically setting the separating force of the air blast that acts on the yarn end in response to said detecting to apply a lesser force in response to detecting of a greater extent of winding build-up.
Dependencies are inferred from the claim text.