are mounted on the transverse element 3 when two identical helices are used as the yarn guide members which helices either comprise an identical number of helices imbricated with one another the helices then rotate at the same speed as the feed arms or comprise single helices rotating at the speed of the feed multiplied by the number of yarns dispensed it is obvious that the weft yarns will cross one another in the middle of the web formed and that the textile fabric obtained will comprise yarns arranged diagonally relative to the warp yarns furthermore in order to secure the ends of the weft yarns it is advantageous to bring the selvedge yarns inside the helices in a known manner finally as shown in the various drawings it is advantageous to arrange weft yarn bobbins 5 behind the plate 4 which provides easy access when it is desired to change the bobbins this device according to the invention is simple rapid and makes it possible to obtain economically and at high speed webs of weft yarns which are incorporated into the production of non woven textile fabrics clearly this is not limiting and such webs of weft yarns could be used for any other application such as for example strengthening paper film and the like fig5 7 8 and 9 illustrate the production of an article which is obtained by feeding four weft yarns and which after formation has.