Rieter Machine Works, Ltd.

Gujer Peter

Olivier Wust

A winding device for automatically changing tubes taking-up endless threads, with a thread deflecting device for lifting the thread off a thread traversing device, a thread holding device for guiding the thread in its lifted-off position during change of the bobbin tube, and at least two driven bobbin chucks which can be alternately brought into a bobbin or tube change position respectively. Each bobbin chuck supporting one tube, and a thread catching- and cutting zone is arranged adjacent one end of the associated tube and rotating therewith. Thread shifting means shift the thread guided by the thread holding device in a first shifting step from a position at the immediate vicinity of the catching- and cutting zone into an end portion of the tube adjacent thereto, and which thread shifting means in a second step shifts the thread over a predetermined distance on such tube for creating the reserve wraps, the thread shifting means shifting the thread at a higher shifting speed during the second step than during the first step. A thread guide element of the thread shifting means is movable in a direction substantially opposite to the direction of the thread shifting movement such that at least one additional shifting step is carried out and which is directed opposite to the above-mentioned first and second shifting steps and such additional step occurring between such first and second shifting steps.

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Effretikon, Switzerland

Gujer Peter