Abstract: The present invention relates to a method and an apparatus for piecing up the broken end of yarn which is being spun by an open-end spinning machine. The end yarn is introduced into a rotor a predetermined time after the rotor has again been started into rotation for piecing up the broken yarn and within the time when the rotor is in acceleration and has not as yet attained its high spinning speed. Then, the yarn end is joined to fiber material supplied into the rotor, while the twist of the yarn is still insufficient, and the centrifugal force applied to the yarn has not attained its maximum value.

Abstract: The present invention relates to an open-end spinning system and more particularly to a method and an apparatus for stopping and starting the spinning operation of the open-end spinning system in such a way that the end portion of the spun yarn of the previous spinning may be used as it is as the piecing-up end yarn for the following spinning operation. The apparatus of the present invention, includes means for positively braking the combing roller for concurrently and suddenly stopping the rotation of the combing roller and the feed roller and means for taking the end portion of the spun yarn out of the spinning rotor, maintaining the taken out portion in a deflected state with the end of the yarn disposed within a spinning tube, and releasing the yarn at the restart of the spinning operation so that said end portion may be injected into the spinning rotor.

Abstract: A method of and apparatus for piecing up the broken yarn in an open end spinning machine wherein the yarn breakage that has occurred in a spinning unit of the machine is pieced up or jointed with the fiber material supplied into a rotor while the spinning unit is operated at the ordinary high spinning speed and while the various elements of the spinning unit are driven at the same speed as the high spinning speed.