passage of the manufactured article which is formed by the needles working around the neck 240 the extension 254a can have one or more lateral holes 260 which serve for the discharge of the air for transport of the fibers coming with the opened fibers from the conveying cavity 214 the transport air also escapes from the relatively limited interspace between the end edge of the neck 240 and the upper end of the extension 254a of the cylinder 254 the escape of the air both from the interspace between neck and extension 254a and from the holes 260 takes place with passage of air through the knitted manufactured article formed by the needles 256 as a result of which at least the greater part of the fibers which are drawn along by the air coming from the conveying cavity 214 are retained by the stitches of the manufactured article formed by the needles 256 the formation of the manufactured article around the exit neck 240 for the opened fibers allows many advantages in relation to the know arrangement among these there can be singled out better access to the needles for replacement and maintenance another advantage is better meshing with the stiches of the yarn which derives from more precise and feasible adjustment of the external yarn guide.