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AssigneesFritz Stahlecker, Hans Stahlecker
InventorsDieter Bottcher, Heinz Schulz, Fritz Stahlecker
Estimating the term…
In start-spinning a thread, which has to be performed after a condition in which the entire machine has been stopped or after a thread break, the individual working conditions have to be maintained as precisely as possible in order to keep the start-spinning points produced at the same spinning point and at different spinning points as uniform as possible and in order to ensure that they are of sufficient strength. An important criterion in this connection is the size and thickness of the ring of fibers located in the spinning rotor, on which the end of the thread is placed after it has been returned and from which the end of the thread is then drawn off again. This ring of fibers significantly influences the appearance and quality of the start-spinning point of the thread. In order to provide a situation in which it makes no difference whether start-spinning is performed after a brief standstill period or after an extended stand-still period, the silver feed of the spinning unit is switched on briefly prior to the actual start-spinning operation, while the rotor is still stopped. This ensures that the fiber tuft, which extends into the area of the opening means, is the same prior to every start-spinning operation, irrespective of the period of time during which the respective spinning point was stopped.
A method for start-spinning a thread on open-end spinning units, in which an end of the thread is returned to a spinning rotor running in an under-pressure chamber, placed on a ring of fibers formed from individual fibers separated from a fed sliver and deposited in said spinning rotor, and then drawn off again, whereby in order to form a ring of fibers which is suitable for the start-spinning operation the feed of said sliver is switched on for a given period of time prior to said end of said thread being placed on said ring of fibers and the thread being drawn off again, the feed then being interrupted again and finally only switched on again for the actual start-spinning operation.
An apparatus for start-spinning a thread on open-end spinning units, in which each spinning unit is equipped with means for feeding a sliver which are switched off after a thread break, said means being acted upon by control means of a travelling maintenance unit, which is equipped with means which switch means for feeding said sliver of said spinning unit on and/or off,
An apparatus for start-spinning a thread on open-end spinning units, in which each spinning unit is equipped with means for feeding a sliver which are switched off after a thread break, said means being acted upon by control means of a travelling maintenance unit, which is equipped with means for feeding said sliver of said spinning unit on and/or off,
A method for thread piecing in an open-end spinning unit, starting with an operating spinning unit, comprising the sequential steps of:
A method for thread piecing an open-end spinning unit, starting with a stopped spinning unit, comprising the sequential steps of:
In a method for thread piecing in an open-end spinning unit of the type wherein thread piecing is carried out during acceleration of an initially stopped spinning rotor towards its operating spinning speed, the improvement comprising the following preparatory steps before starting the spinning rotor to perform the piecing operation:
Apparatus for thread piecing in an open-end spinning assembly comprising:
In apparatus for thread piecing in an open-end spinning unit of the type wherein thread piecing is carried out during acceleration of an initially stopped spinning rotor toward its operating spinning speed, the improvement comprising preparatory means for performing the following preparatory steps before starting the spinning rotor to perform the piecing operation:
Dependencies are inferred from the claim text.