Patent Abstract:
A device for the manufacture of a spun thread from a fiber sliver includes a fiber conveying channel with a fiber guidance surface. A yarn guidance channel includes an inlet mouth aperture disposed such that the fiber guidance surface guides fibers to the inlet mouth aperture. A fluid generating device creates eddy currents around the inlet mouth aperture to incorporate individual fibers into an end of a yarn being formed in the yarn guidance channel. The fiber guidance surface includes a fiber delivery edge having a shape and disposed relative to the inlet mouth aperture such that the fibers are guided over the delivery edge and conveyed to the inlet mouth aperture in an aligned generally flat planar formation.

Full Description:
FIELD OF THE INVENTION 
   The invention relates to a device for the production of a spun thread from a fibre sliver, encompassing a fibre conveying channel with a fibre guide surface for the guidance of the fibres of the fibre sliver into the inlet aperture mouth of a yarn guidance channel, and further comprises a fluid device for the production of an eddy current around the inlet aperture mouth of the yarn guidance channel. 
   BACKGROUND 
   Such a device is known from DE 44 31 761 C2 (U.S. Pat. No. 5,528,895) and is shown in  FIGS. 1 and 1   a . In this, fibres are guided through a fibre bundle passage  13  on a twisted fibre guidance surface, which exhibits a “rear” edge  4   b  about a “front” edge  4   c . The fibres are then guided around what is referred to as a needle  5  into a yarn passage  7  of what is referred to as a spindle  6 , whereby the rear part of the fibres are rotated by means of an eddy current generated by nozzles  3  about the front part of the fibres, already located in the yarn passage, with a yarn being formed as a result. Once this has been done, spinning takes place, as is described later in connection with the invention. 
   The element referred to as the needle, and its tip about which the fibres are guided, is located close to or in the inlet aperture mouth  6   c  of the yarn passage  7  and serves as what is referred to as a false yarn core, in order as far as possible to prevent or to reduce the possibility that, due to the fibres in the fibre bundle passage, an impermissibly high false twist of the intertwined fibres occurs, which would at least interfere with the formation of the yarn if not even preventing it altogether. 
     FIG. 1   b  shows this aforementioned prior art encumbered with disadvantages (DE 41 31 059 C2, U.S. Pat. No. 5,211,001), in that, as is known from DE 44 31 761,  FIG. 5 , the fibres are not guided consistently about the needle as shown in  FIG. 1   a , but are guided on both sides of this needle against the inlet aperture mouth of the yarn passage, which apparently interferes with the binding of the fibres and apparently can lead to a reduction of the strength of the spun yarn. 
     FIG. 1   c  shows a further development of  FIG. 1 , or  1   a  respectively, in that the fibre guidance surface  4   b , as can be seen, is designed in a helical shape, and the fibres are accordingly likewise guided in helical form in their course from the clamping gap X as far as the end e 5  of the helical surface, and are then wound, still in helical form, about a fibre guidance pin, similar to the fibre guidance pin  5  of  FIG. 1 , before the fibres are acquired by the rotating air flow and twisted to form a yarn Y. In this situation, it can be seen that the rear ends of the fibres f″ are bent about the mouth part of the spindle  6 , and in this context are taken up by the rotating air flow and wound around the front ends, which are already located in the center of the fibre run, in order to form the yarn as a result. 
     FIG. 1   c  corresponds to  FIG. 6  from DE 19603291 A 1 (U.S. Pat. No. 5,647,197), whereby the identification references of the spindle  6 , the yarn passage  7 , and the venting cavity  8  have been adopted from  FIG. 1 , while the element e 2 , which has a similar function to the needle  5  of  FIGS. 1 to 1   b  has been left as it was. It can likewise be seen from this  FIG. 1   c  that the fibres are transferred from a helical formation to the inlet of this spindle. 
   A further prior art from the same Applicants is specified in JP 3-10 64 68 (2) and seen in  FIGS. 1   d  and  1   e , which, by contrast with  FIG. 1 , does not exhibit a needle, but rather a truncated cone  5   a  with a flat fibre guidance surface, which is a part of the fibre guidance channel  13 , and the tip of which is arranged essentially concentric to the fibre guidance run  7 . The purpose of this cone is the same as that of the tip  5 , namely of producing what is referred to as a false yarn core in order to prevent the fibres from being incorrectly twisted; in other words, that a false twist occurs from the tip backwards against the clamping gap of the output rollers, which would at least in part prevent a true twist of the fibres such as to form the yarn. 
   SUMMARY 
   Objects and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention. 
   The problem was therefore to find a method and device in which the fibres undergo fibre guidance by means of which the fibres can be taken up by the air eddy which is created in such a way that a uniform and firm yarn can be produced. 
   The problem was resolved in that a fibre guide surface exhibits a fibre delivery edge, over and by means of which the fibres are guided in a formation lying essentially flat next to one another, against an inlet aperture mouth of a yarn guidance channel. 
   Further advantageous embodiments are provided in the other dependent claims. 
   The invention is described hereinafter in greater detail on the basis of drawings which represent only some means of implementation. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIGS. 1–1   c  Figures from DE 44 31 761 C2, whereby  FIG. 1   b  corresponds to the device from DE 41 31 059 C2 and  FIG. 1   c  the device from DE 19 60 32 91 A1, corresponding to figures from JP3-10 63 68 (2); 
       FIGS. 1   d  and  1   e  Figures from JP3-10 63 68 (2); 
       FIG. 2  A first embodiment of the invention essentially according to the section lines I—I ( FIG. 2   b ), whereby a middle element is represented not in section; 
       FIG. 2   a  A section according to the sectional lines II—II of  FIG. 2 ; 
       FIG. 2   b  A cross-section according to the section lines III—III of  FIG. 2 ; 
       FIG. 2   c  Represents a section taken from  FIG. 2 , represented as an enlargement; 
       FIG. 2.1  The same embodiment as  FIG. 2 , whereby the fibre or yarn flow is additionally shown; 
       FIG. 2   a . 1  Corresponds to  FIG. 2   a , whereby the fibre or yarn flow is additionally shown, and a possible modification of the fibre delivery edge is also represented; 
       FIG. 2   b . 1  Corresponds to  FIG. 2   b , whereby the fibre or yarn flow is additionally shown; 
       FIG. 3  A second embodiment of the invention, essentially according to the section lines I—I from  FIG. 3   a;    
       FIG. 3   a  A cross-section according to the section lines III—III of  FIG. 3   
       FIG. 3   b  A cross-section corresponding to  FIG. 3   a  through a first variant of the second embodiment; 
       FIG. 3   c  A cross-section corresponding to  FIG. 3   a  through a second variant of the second embodiment; 
       FIG. 3   d  A cross-section corresponding to  FIG. 3   a  through a third variant of the second embodiment; 
       FIG. 4  A third embodiment of the invention, essentially according to the section lines I—I from  FIG. 4   a;    
       FIG. 4   a  A cross-section according to the section lines III—III of  FIG. 4 ; 
       FIGS. 5–5   b  A further variant of the invention according to  FIGS. 2–2   b;    
       FIGS. 6–6   b  Another variant of the invention according to  FIGS. 2–2   b;    
       FIG. 7  A further variant of the invention according to  FIG. 3 ; 
       FIG. 7   a  A cross-section according to the section lines IV—IV of  FIG. 7 ; 
       FIG. 8  A representation of a drafting device as a fibre feed into the element of  FIG. 2.1 ; and 
       FIG. 9  A representation of a fibre releasing device as a fibre feed into the element of  FIG. 2.1 . 
   

   SUPPLEMENTARY DESCRIPTION OF THE PRIOR ART 
     FIG. 1  shows a housing  1  with the housing parts  1   a  and  1   b  and with a nozzle block  2  integrated in it which contains jet nozzles  3 , by means of which an eddy current as described heretofore is created, as well as what is referred to as a needle holder  4  with the needle  5  inserted in it. 
   As can be seen from  FIG. 1   a , the eddy current produces a right-hand swirl in the direction of the arrow (seen looking towards the Figure), and accordingly the fibres F being delivered are conducted in this direction of rotation about the needle  5  against a face side  6   a  of what is referred to as the spindle  6  ( FIG. 1 ), and introduced into a yarn passage  7  of the spindle  6 . In this situation, a relatively large distance interval pertains between the nozzle block  2  and the face side  6   a  of the spindle, since space must pertain in this distance interval for the needle  5  and its tip. 
   The fibres F are conveyed in a fibre guidance channel  13  on what is referred to as the fibre guide surface, by way of an aspirated air flow, against the tip of the needle  5 . 
   The aspirated air flow is created on the basis of an injector effect of the nozzle jets  3 , which are provided in such a way that, on the one hand the air eddy referred to is created, while on the other air is also sucked in through the fibre conveying channel  13 . 
   This air escapes along a conical section  6   b  of the spindle  6  through an air escape cavity  8  into an air outlet  10 . 
   The compressed air for the jet nozzles  3  is delivered to the jet nozzles in a uniform manner by means of a compressed air distribution chamber  11 . 
     FIG. 1   b , which represents the prior art to  FIGS. 1 and 1   a  referred to heretofore, shows that this Figure, by contrast with  FIG. 1   a , additionally exhibits a needle holder extension piece  4   a ′, which projects from a face surface  4 ′ and contains the needle  5 ; i.e. the fibres are guided over the entire extension, which pertains because of the contour of the needle holder  4 , against the inlet of the spindle  6 . 
     FIGS. 1   c  to  1   e  have already been discussed. In this situation, the identification numbers of these Figures which have not been mentioned do not have any explanation in this application. The disadvantage of these devices lies in the uncertain fibre guidance at a large distance interval from the face side of the needle holder  4  to the inlet mouth aperture  6   c  in the face side  6   a  of the spindle  6 , as well as in the guidance of the fibres to or about the needle  5  or the cone element  5   a  of  FIGS. 1   d  and  1   e  respectively. 
   DETAILED DESCRIPTION 
   Reference is now made to embodiments of the invention, one or more examples of which are illustrated in the drawings. The embodiments are provided by way of explanation of the invention, and not meant as a limitation of the invention. It is intended that the invention include modifications and variations to the embodiments described herein. 
   In order to alleviate certain disadvantages of the prior art devices, according to  FIGS. 2–2   c  the invention exhibits a fibre delivery edge  29 , which is located very close to an inlet mouth aperture  35  ( FIG. 2   a ) of a yarn guidance channel  45 , which is provided inside what is referred to as a spindle  32 . For a special advantage, a specified distance interval A ( FIG. 2   c ) is defined between the fibre delivery edge  29  and the inlet mouth aperture  35 , and with a specified distance interval B between an imaginary plane E which contains the edge, this plane running parallel to a mid-line  47  of the yarn guidance channel  45 , and this aforesaid mid-line  47 . 
   In this situation the distance interval A, depending on the fibre type and mean fibre length, and on the relevant experimental results, corresponds to a range from 0.1 to 1.0 mm. The distance interval B depends on the diameter G of the inlet aperture mouth  35 , and, depending on experimental results, lies within a range from 10 to 40% of the diameter G referred to. 
   In addition to this, the fibre delivery edge exhibits a length D. 1  ( FIG. 2   a ), which is in a proportion of 1:5 to the diameter G of the yarn guidance channel  45 , and is formed by a face surface  30  ( FIG. 2 ) of a fibre conveying element  27  and a fibre guidance surface  28  of the element  27 . In this situation, the face surface  30 , with a height C ( FIG. 2   c ), lies within the range of the diameter G and exhibits an empirically-determined distance interval H between the plane E and the opposite inner wall  48  of the yarn guidance channel  45 . 
   The fibre conveying element  27  is guided in a carrier element  37  accommodated in a nozzle block  20 , and together with this carrier element forms a free space which creates a fibre conveying channel  26 . 
   The fibre conveying element  27  exhibits at the inlet a fibre take-up edge  31 , about which the fibres are guided, these being conveyed by a fibre conveying roller  39 . These fibres are raised from the fibre conveying roller  39  by means of a suction air flow from the conveying roller, and conveyed through the fibre conveying channel  26 . The suction air flow is created by an air flow generated in jet nozzles  21  with a blast direction  38 , on the basis of an injector effect. 
   The jet nozzles, as represented in  FIGS. 2 and 2   b , are arranged in a nozzle block  20  on the one hand at an angle β ( FIG. 2 ), in order to create the injector effect referred to heretofore, and, on the other, are offset at an angle α ( FIG. 2   b ), in order to create an air eddy which rotates with a direction of rotation  24  along a cone  36  of the fibre conveying element  27 , and about the spindle front surface  34  ( FIG. 2   a ), in order, as described hereinafter, to form a yarn in the yarn guidance channel  45  of the spindle  32 . 
   The air flow created by the nozzles  21  in an eddy chamber  22  escapes along a spindle cone  33 , through an air escape channel  23  formed around the spindle  32 , into the atmosphere or into a suction device. 
   To form a yarn  46  ( FIG. 2   a ), the fibres F which are delivered from the fibre conveying roller  39 , are raised from the fibre conveying roller  39  by means of the suction air flow referred to in the fibre conveying channel  26 , and are guided on the fibre guidance surface  28  in a conveying direction  25  ( FIG. 2 ) against the fibre delivery edge  29 . From this delivery edge, front ends of the fibres are guided through the spindle inlet aperture mouth  35  into the yarn guidance channel  45 , while the rear ends or the rear part  49  of these fibres are folded over as soon as the rear ends are free and taken up by the rotating air flow, so that, with the further conveying of the fibres in the yarn guidance channel  45 , a yarn  46  is created which exhibits a yarn character similar to the ring yarn. 
   This process is represented in  FIGS. 2.1  to  2   b . 1 . It can be seen in these figures that the fibres F delivered with the fibre delivery roller  39  are conducted in the conveying direction  25  on the fibre guidance surface  28  against the fibre delivery edge  29 , and specifically, as shown in  FIG. 2   a . 1 , with a converging fibre flow, which tapers increasingly towards the inlet aperture mouth  35  ( FIG. 2   a ). This tapering is applied because the front ends, which are already incorporated into the twisted yarn  46 , have a tendency to migrate in the direction of the tapering, so that front ends of fibres located further to the rear are likewise displaced in the direction of the tapering. This only happens, however, until the rear part  49  of the fibres F have been taken up by the air eddy referred to, and rotated around the spindle front surface  34  and drawn into the inlet aperture mouth  35  at the thread draw-off speed, in the process acquiring the twist necessary for the formation of the yarn. 
   In  FIG. 2   a , the width D. 1 , as shown by the broken lines, is represented in extended form, specifically on the one hand in order to show that the width can be extended, and, on the other, likewise to show that this extended width will, under certain circumstances, reduce the size of the eddy chamber shown in  FIG. 2   a , if not even changed with interfering effect, in that the eddy current can no longer develop therein in such a way that the fibre ends  49  can be taken up by the eddy flow with the energy required. This too must be determined by means of empirical experiments. 
   The yarn formation referred to heretofore takes place after the start of a spinning process of any kind, for example in which a yarn end of an already existing yarn is conducted back through the yarn guidance channel  45  into the area of the spindle inlet mouth aperture  35  sufficiently far for fibres of this yarn end to be opened sufficiently wide by the air flow, which is already rotating, that front ends of fibres which are newly conducted to the fibre guidance channel  26  can be taken up by this rotating fibre sliver and, by repeat drawing of the yarn end which has been introduced, can be held in the sliver such that the following rear parts of the newly-delivered fibres can be wound around the front ends which are already located in the mouth aperture section of the yarn guidance channel, so that, as a consequence, the yarn referred to can be respun with an essentially pre-determined arrangement. 
   The sequence has been described on the basis of an example in which the front end of a fibre, seen in the direction of conveying, is incorporated in the fibre sliver, and the rear end of this fibre is or becomes free to be “folded over.” The process can, however, take place in an analogous manner in the case of an incorporated rear end of the fibres, whereby the front end is free, and, because of the axial component of the eddy air flow, is deposited at the spindle front surface  34 . The fibre parts which are deposited on the spindle front surface  34  then rotate because of the eddy air flow, and are therefore wound around the fibre ends which have been bound in. 
     FIGS. 3 and 3   a  show a further embodiment of the fibre guidance channel  26  of  FIGS. 2–2   c , in this case as the fibre guidance surface  28 . 1  with an elevation  40  arranged at a distance interval M from the fibre delivery edge  29 , over which the delivered fibres slide before they reach the fibre delivery edge  29 . In this situation the distance M corresponds to a maximum of 50% of the mean fibre length. 
   The elevation exhibits a distance interval N to a fibre guidance surface without elevation, which lies within the range of 10 to 15% of the distance interval M. 
   The distance intervals M and N are to be determined empirically in accordance with the fibre type and fibre length. 
   This elevation  40  can exhibit the shapes shown with  FIGS. 3   a – 3   d ; i.e. the edge can be concave, according to  FIG. 3   b , for example for “slippery” fibres to be explained later, convex according to  FIG. 3   c  for “sticky” fibres, or, according to  FIG. 3   d , wave-shaped. Correspondingly, the fibre guidance surfaces of  FIGS. 3   b  to  3   d  are designated as  28 . 2 ,  28 . 3 , and  28 . 4 . 
   These shapes serve to provide different fibre guidance on the fibre guidance surface  28 . 1 – 28 . 4 , and are to be determined empirically according to the fibre type and fibre length. In this situation, the term “slippery” fibre is understood to mean such as exhibit weak mutual adhesion, and “sticky” fibres such as exhibit a stronger mutual adhesion. The elements which do not have characterization identification correspond to the elements in  FIGS. 2 to 2   c.    
   A further advantage of the elevation lies in the fact that, due to the movement of the fibres over this point, a loosening of possible dirt particles inside the fibre sliver takes place, which are taken up by the conveying air flow and can be conveyed into the open air or into a suction device. 
     FIGS. 4 and 4   a  show a further variant of the fibre guidance surface  28  of  FIGS. 2–2   c : fiber guidance surface  28 . 5 . According to this variant, the fibre guidance surface exhibits, at a distance interval P from the fibre delivery edge  29  of a maximum of 50% of the mean fibre length, a depression  41  with a radius R. 1 , whereby the lowest point of the depression  41  is located lower than the edge  29  of  FIGS. 2–2   c . In this situation the depression  41  and the radius R. 1  are to be determined empirically on the basis of the fibre type and fibre length, and the depression  41  serves to prevent fibres (short fibres, for example) from moving away sideways, i.e. of being lost as wastage. 
   As shown in  FIG. 4 , this variant can also be combined with the elevation  40  (represented by a broken line) of  FIGS. 3 and 3   a  or  3   b  to  3   d.    
   The elements which do not have characterization identification correspond to the elements in  FIGS. 2 to 2   c.    
     FIGS. 5–5   b  show a further variant of the design of the fibre delivery edge  29 , in that the face surface  30 . 1  exhibits a convex rounding provided with a radius R. 2 , and in this situation the fibre delivery edge  29  acquired a width D. 2 . In this case too, the selection of the radius and the width is a matter of empirical experiments, in order to be able to adapt to the fibre type and fibre length in a way optimum for the yarn formation. In this situation, measures can also be applied to influence the optimization of the eddy chamber  22  from the technical flow point of view, as mentioned earlier. 
   The elements which do not have characterization identification correspond to the elements in  FIGS. 2 to 2   c.    
     FIGS. 6–6   b  show a similar variant concept, inasmuch as, in this case, it is not a convex face side  30 . 1  which is provided for, but a concave face side  30 . 2 , with a radius R. 3  and an edge length of D. 3 . The radius R. 3  and the edge length D. 3  must be determined empirically according to the fibre length and the fibre type. These measures serve to influence the tapering mentioned earlier of the fibre at the inlet aperture mouth. 
   The elements which do not have characterization identification correspond to the elements in  FIGS. 2 to 2   c.    
     FIGS. 7 and 7   a  show a variant of  FIGS. 3–3   d , in which the fibre guidance surface consists in this case of a porous place  42  made of sinter material, so that compressed air from a cavity  43  located beneath the porous plate  42  can flow in a very uniform and fine distribution through the porous plate and into the fibres located on this, so that, in a certain sense, a fluidization of the fibres takes place, i.e. a homogenous mingling of air and fibres, which incurs a separation of fibre from fibre, and therefore an increase in the “slipperiness” referred to, i.e. a reduction of the adhesion of the fibres referred to heretofore due to the air located between the fibres. 
   As a result of this separation, any dirt is more easily loosened and released, with the result that this dirt can be better acquired by the suction air flow at the transition over the intermediate elevation  40 . The compressed air for the cavity  43  is introduced via the compressed air feed  44 . 
   The pressure in the cavity  43  is to be determined empirically in accordance with the porous plate and the tolerable air outlet speed from the porous surface, and specifically in such a way that the fibres from this air flow is not raised above a tolerable value from the fibre guidance surface. 
   The porous plate is accommodated by the parts  27 . 1  and  27 . 2  of the fibre conveying element  27 , whereby, because they contain the inlet edge and the fibre delivery edge of the fibres, these parts are made of a material which is more resistant to wear than a porous plate. 
     FIG. 8  shows a nozzle block from  FIG. 2.1  in combination with a drafting device  50 , consisting of the inlet rollers  51 , and apron pair  52  with the corresponding rollers, and the outlet roller pair  53 , which delivers the fibre sliver F to the nozzle block  20 . The fibres leave the drafting device  50  in a plane which contains the clamping line of the outer roller pair. This plane can be offset in relation to the fibre guidance surface  28  in such a way that the fibre sliver is deflected at the fibre take-up edge  31  (see  FIGS. 2 and 2   a  respectively). 
     FIG. 9  shows, as an alternative to the drafting device, a device in which a fibre sliver  54  is broken up into individual fibres and in the final stage is delivered by means of a suction roller  62  as a fibre sliver F to the nozzle block  20  of  FIG. 2.1 . This device is the object of a PCT application with the number PCT/CH01/00 217 by the same Applicants, to which application reference is made as a constituent part of this application. An alternative can be derived from U.S. Pat. No. 6,058,693. 
   The fibre sliver break-up device according to  FIG. 9  comprises a feed channel  55 , in which the fibre sliver  54  is delivered to a feed roller  56 , whereby the fibre sliver is conveyed onwards from the feed roller  56  to a needle roller or toothed roller  61 , by which the fibre sliver is broken up into individual fibres. A feed trough  57  presses the fibre sliver  54  against the feed roller, in order thereby to feed the fibre sliver in metered fashion to the needle roller or toothed roller  61 . In this situation the hinge  58  and the pressure spring  59  serve to allow for the necessary pressure force. 
   In the next stage the needle roller  60  transfers the fibres to a suction roller  62 . In this situation the dirt, identified by a T, is separated out. 
   With the help of the suction force, the suction roller  62  holds the fibres tightly in the area delimited by A to B, seen in the direction of rotation, as far as the clamping point K. After this clamping point, the fibres are released for further conveying in the fibre guidance channel  26 . In the channel  26 , the fibres are acquired by the air flow  25 . The release referred to takes place, for example, because the suction effect on the suction roller  62  is no longer present after the clamping point K, for example because the cover connecting the points A and B (shown in  FIG. 9 ) is no longer provided after the clamping point K. The release can, however, be enhanced by means of an air blast B. 2 , which blows through the holes  63  by means of the channel B. 2 . This air blast B. 2  can, however, be dispensed with. The channel B. 2  is supplied with compressed air via the channel B. 1 . 
   The fibres leave the suction roller  62  in a plane which contains the clamping line K. This plane can be offset in relation to the fibre guidance surface  28  in such a way that the fibre sliver is deflected at the fibre take-up edge  31  (see  FIGS. 2 and 2   a  respectively). 
   As far as the drafting device from  FIG. 8  is concerned, this is a generally known drafting device system, and it is accordingly not considered in any further detail. 
   From  FIGS. 8 and 9 , it can be seen that the fibre conveying channel  26  is provided with a fibre guidance surface  28 , which is designed without a twist (or without a helix) (see  FIGS. 1   a  and  1   c  respectively). The fibre guidance surface  28  leads to a fibre delivery edge  29 , which is positioned in relation to the inlet aperture mouth  35  of the yarn guidance channel in such a way that the fiber sliver F must come in contact with the edge  29  in order to enter into the inlet aperture mouth  35 . As a result of this, a continuation of a yarn rotation, upstream of the edge  29 , is prevented or at least substantially reduced. 
   It can be seen from the same figures that the fibre conveying channel  26  is located on the one hand entirely on one side of an imaginary plane (not shown) running perpendicular seen looking towards  FIG. 2 , and contains the mid-line  47  of the yarn channel  45 . The fibre conveying channel  26 , on the other hand, is also run close to the inlet aperture mouth  35  of the yarn guidance channel  45  in such a way that, in the combination of the two measures, at least a part of the fibre sliver F must be deflected in order to pass out of the fibre conveying channel  26  into the yarn guidance channel  45  (see  FIGS. 1   a  and  1   c  respectively, where, as a departure to what has gone before, a substantial distance interval pertains between the end of the fibre guidance channel and the spindle, in order to allow for the provision of the needle  5  in the intermediate space). 
   In the preferred embodiment ( FIGS. 8 and 9 ), the fibre delivery edge  29  of the fibre conveying channel  26  is provided in a plane E ( FIG. 2   c ) parallel to the first plane mentioned, containing the mid-line  47 , said plane being arranged at a predetermined interval B from the plane first referred to. 
     FIGS. 8 and 9  also show that the fibres which in operation leave the fibre conveying channel  26  enter directly into the area (space  22 ,  FIG. 2 ) in which the eddy flow is present. This also represents a change in relation to the arrangement according to  FIG. 1 , because in this latter arrangement a distance interval pertains between the end of the fibre guidance channel  13  and the plane in which the outlet aperture mouths of the blower nozzles  3  are located. 
   It should be appreciated by those skilled in the art that modifications and variations can be made to the embodiments described herein without departing from the scope and spirit of the invention as set forth in the amended claims and their embodiments.

Technology Classification (CPC): 3