The invention relates to a blowing nozzle for transporting a flexible thread, comprising a supply channel for the thread to be transported, the exit end of the channel being surrounded by an annular gap which upstream communicates with means for supplying a flowing pressurized fluid, and in the downstream direction merges with a mixing tube extending substantially as an extension of the supply channel for the thread.
Similar blowing nozzles are generally known. They are e.g. applied to pneumatic weaving machines for sucking in the weft threads by means of pressurized air and entering them into the weaving shed.
Due to all kinds of causes which may be found in the thread itself as well as exteriorly, the head of a thread transported by means of such a blowing nozzle will not always continue after leaving the exit end, along a fixed path (e.g. along the axis of the mixing tube) but variously deviates therefrom. This constitutes an important disadvantage in all those cases in which the thread, after leaving the blowing nozzle, must remain within a narrowly delimited area in order to have the further transport of the thread occur without disturbances. E.g. in a pneumatic weaving machine the head of the thread must be supplied within the cross-section of a tunnel formed in the weaving shed (by means of the reedlamellae or of lamellae especially serving this purpose). A deviation of the optimum path of movement of the thread may e.g. result in that the head of the thread "impacts" against the warp threads which in the relative movement during the previous shed exchange temporarily have caught each other by knotting.