Abstract: A travelling service unit prevents full bobbins removed from bobbin holders from assuming an unwanted position when being laid onto a conveyor belt. According to the invention, the travelling service unit is provided with bobbin gripping means attached to conveying means. The latter is arranged on the frame of the travelling unit for swinging about a longitudinal pivot extending in parallel to the conveyor belt, together with the gripping means and a full bobbin, transversely to the space above the conveyor belt, by driving means.

Abstract: A device for automatically spinning-in yarn in spinning units of open-end rotor spinning machines improves the process of leading the spinning-in head of the device onto the take-off tube of the spinning unit by using simple means.According to the invention the spinning-in head is attached to a swing lever by attaching means kinematically firmly in the plane of its swing motion but resiliently in the direction perpendicular to said plane, in order to allow the spinning-in head to move across the mouth of said take-off tube while being lead by a lead-on cone.