Japanese Patent JPS6229530

B2

An open-end spinning machine is provided which includes a plurality of commonly driven spinning units arranged in side-by-side relationship. Each of the spinning units includes a spinning rotor, an opening device for opening fibers, a fiber feed device for feeding fibers from the opening device to the spinning rotor, and vacuum producing means for generating an air current to act on the fibers to aid in the feeding through the fiber feed device. To accommodate start-up operations and restarting in the event of a shut-down spinning unit, piecing apparatus is provided which includes a thread end return device for returning a thread end into the rotor for piecing onto a fiber ring deposited inside of the rotor and for taking off the pieced thread. In preferred embodiments, the piecing apparatus is equipped with additional devices for controlling the rotor speed and the quantity of fibers fed during the piecing step. In order to enhance the control of the fiber feed during piecing operations, air flow control devices are provided for controlling the air current produced by the vacuum source device at the fiber feed device. In particularly preferred embodiments, the air flow control device includes selectively actuable venting sealing elements for selectively venting the vacuum applying lines and housing to atmosphere, to thereby slow down the effective rate of fiber feed.

JP2005112552	THREAD PIECING DEVICE
JP2013067467	YARN SPLICING DEVICE AND YARN WINDING DEVICE
JPS5757164	METHOD AND APPARATUS FOR JOINING THREAD

HANSU SHUTAARETSUKAA
HAINTSU SHURUTSU

JP2402579A

June 26, 1987

February 28, 1979

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FURITSUTSU SHUTAARETSUKAA
HANSU SHUTAARETSUKAA

B65H69/06; D01H4/50

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