EP1347084B1 - Air-jet spinning device with channelling element - Google Patents

Abstract

A textile spinning station has a passage (4) to a spindle (7). The passage has a lining (17) whose trailing-edge step is co-located with an incoming air jet (13.1). The step end-face (18) acts as a guide for air emerging from the jets (13.1) into a vortex chamber (14.1). A textile spinning assembly has a spinning station which converts a staple fibre feed into a continual thread and incorporates a thread guide vane (3) to a vortex chamber (14.1) and a thread feed channel (4). The vortex chamber (15) has a spindle (7) with a yarn passage (8) separated from the vane (3) by a gap. The vortex chamber (15) has a vortex (11) generating jet (13.1) around the yarn passage (8) inlet (9). The thread feed channel (4) esp. has a tunnel lining (17) forming a trailing edge step to the vortex chamber (14.1). The inclined step end-face (18) acts as a guide for the fluid emerging from the jet (13.1). The step angle of inclination alpha is the same as, or greater than, that of the incoming jet (13.1).

Description

The present invention relates to an apparatus for producing a spun yarn from a staple fiber composite according to the preamble of claim 1.

State of the art

Such devices are known in the textile industry and are used for air spinning. Such a device discloses, for example, the document EP 854 214 (equivalent to US Pat. No. 5,927,062), which is shown in FIG. It can be seen how a staple fiber strand 1 is supplied by an outlet roller pair 2 (usually a drafting system) and passes through a fiber guide element 3.1. The fiber guiding element 3.1 has a fiber conveying channel 4 with a helical fiber guiding surface 5. The staple fiber strand 1 is passed through the fiber guide surface 5, which ends at a fiber discharge edge 6. At a certain distance from the fiber guide element 3.1, or to the fiber discharge edge 6, a spindle 7 with a Garnführungskanal 8 and the Garnführungskanal 8 associated inlet port 9 is provided. Between the fiber guide element 3.1 and the inlet mouth 9, a fluid device for generating a vortex flow around the inlet port 9 is provided (fluid device not shown). The fluid device generates a vortex flow 11 around the inlet mouth 9, or about the spindle 7 in the space 14. The figure 1 shows the air spinning device only schematically. The space 14 is normally closed by a housing and can therefore be referred to as a vortex chamber (14.1, see the following figures). As the fluid, compressed air is usually used. As a result of the generated vortex flow 11, the free fiber ends 12 of the staple fiber structure 1 surround the inlet mouth 9. The movement of the fiber structure 1 in the direction of the arrow produces a relative rotating movement of the free fiber ends 12 around the inlet mouth 9 and thereby around the fiber structure 1 Staple fiber strand 1 thus creates a spun yarn 10th

The present invention is concerned with the guidance of the fluid (air) flowing out of the fluid device. It deals in particular with the area of the vortex chamber 14.1 in the immediate vicinity of the outlet openings for the fluid.

Another prior art, according to the Japanese publication JP 3-10 63 68, show the figures 2 and 2a. In FIG. 2, substantially the same components as in FIG. 1 are shown (with a change, see FIG. 2a). In particular, the outlet roller pair 2 and the spindle 7 with the Garnführungskanal 8 can be seen. Analogously to FIG. 1, a fluid device also generates a turbulent flow here. In this case, the fluid device consists of a plurality of jet nozzles 13.1. The jet nozzles consist of generally cylindrical bores from which a fluid (preferably air) is pressed under pressure into the vortex chamber 14.1. The vortex chamber 14.1 has a circular cross-section. The incoming compressed air generated by their, resulting from the bore arrangement, flow direction and by the circular cross section of the vortex chamber 14.1 a vortex flow around the inlet mouth 9 of the spindle 7. As can be seen in Figure 2, the fiber guide element 3.1 includes a sheath 3a, which also forms the fiber conveying channel 4. Immediately to the casing 3a, a vortex chamber housing 15 connects. In the device according to this figure, the fluid device (represented by the bores or jet nozzles 13.1) is integrated in the sheathing of the fiber guiding element 3a. In the apparatus shown, the vortex chamber housing 15 and the sheathing of the fiber guide element 3a are two separate components. However, it is quite possible and known from the prior art, both components as an element to construct (in one piece). Whether these elements are constructed in one piece or as separate components is irrelevant to the present application.

In FIG. 2a, the fiber guiding element 3.1 of FIG. 2 is shown in a three-dimensional view. In contrast to Figure 1, the fiber guide element 3.1 Figure 2 no helical, but a flat fiber guide surface 16. Another difference from Figure 1 lies in the absence of a fiber delivery edge. Instead of the fiber delivery edge, the fiber guide element part 3b has a blunt cone. The purpose of this cone 16 is to produce a so-called false twine core.

This is intended to prevent a false twist (twisting of the staple fiber strand) from the inlet mouth 9 being propagated backwards through the fiber guide element 3.1 up to the nip of the pair of delivery rollers 2 (so-called twist stop). A false twist prevents a true turning or twisting of the free fiber ends 12 around the (untwisted) yarn core. In the case of a false twist, the core of the staple fiber strand rotates with the free fiber ends 12 and prevents spinning of the fibers. In the prior art according to FIG. 1, the twist stop is realized by the helical fiber guide surface 5, which is intended to make it impossible to twist the staple fiber strand 1 against the outlet rollers 2.

Another prior art, which relates to the device according to the invention, can be found in a patent application of the applicant which is unpublished at the time of this application (international application number: PCT-CH 01-00569).

Object of the present invention is to improve the flow conditions in the swirl chamber and thus the yarn values of the yarn produced. In particular, the area of the vortex chamber should be fluidly improved in the immediate vicinity of the outlet openings of the jet nozzles.

The invention

The object of the invention is achieved by the inventive features in the characterizing part of the main claim 1. Further advantageous or preferred embodiments of the invention are set forth in the dependent claims.

Experiments with inventively designed air spinning devices have surprisingly revealed that the air flow through the fiber conveying channel with a tunnel lining and appropriately designed paragraph, and a favorable design of the vortex chamber adjacent end face of the fiber guide element, can cause up to 50 percent increase in the amount of air. Further experiments have revealed that the unexpected improvement in flow conditions attributable to two different effects. On the one hand, the reduction of the cross section of the fiber conveying channel through the tunnel lining has brought about the unexpected effect that the amount of air flowing through has increased. On the other hand, a deliberate design of the heel of the tunnel lining to the swirl chamber housing has caused a significant improvement in the flow conditions in the chamber itself. The deliberate design of the heel as a guide surface has an unexpected effect on the air emerging from the jet nozzles (or other fluid). This design causes an improvement in the flow conditions in the vortex chamber and an improvement in the flow conditions in the fiber conveying channel. The swirl chamber adjacent end face of the fiber guide element can also be designed such that it serves as a guide surface for the turbulent flow. In a further embodiment of the invention idea, the end face can be designed such that it does not disturb the vortex flow at least (in that the end face has a greater inclination than the flow direction of the exiting fluid). In both cases, the adaptation of the end face also improves the effect according to the invention.

The increased air flow or the air throughput (amount per unit time) through the fiber conveying channel, the fiber guide between the outlet rollers and the entrance of the fiber conveying channel (see Figure 1 or 2) is improved. The increased air flow through the fiber conveying channel "draws" the continuous bandage of loose staple fibers more intensively into the fiber conveying channel. The individual fibers in the staple fiber strand are better aligned by this flow, and the staple fiber strand is less prone to "flapping" (caused by the air flow around the rotating discharge rolls) before entering the fiber feed channel. The number of production interruptions, caused by breaks of the staple fiber association immediately after the outlet rollers, could be reduced by the inventive embodiments. Likewise a measurable improvement of the yarn quality could be determined.

In the following the invention and the idea of the invention will be explained with reference to exemplary embodiments illustrated in FIGS., Wherein the invention is not limited to the embodiments shown in the examples.

Figur 1

Stand der Technik aus der Schrift EP 854 214

Figuren 2 und 2 a

Stand der Technik gemäss der JP 3-10 63 68

Figur 3

eine erste Ausführungsform der Erfindung

Figur 3 a

Schnitt der erfindungsgemässen Vorrichtung gemäss Figur 3

Figur 3 b

einen zweiten Schnitt der Ausführungsform gemäss Figur 3

Figur 3 c

Faserführungselement und Halbschale der Tunnelauskleidung

Figur 4

weitere Variante der Erfindung

Figur 4 a

Schnitt I-I aus der Figur 4

Figur 5

weitere mögliche Ausführungsform der Erfindung

Figur 6

schematische Darstellung des Spinnprozesses

Figuren 7, 7 a, 7 b, 8, 8 a

weitere Ausführungsformen der Erfindung

It shows:

FIG. 1

Prior art from the document EP 854 214

FIGS. 2 and 2 a

Prior art according to JP 3-10 63 68

FIG. 3

a first embodiment of the invention

Figure 3 a

Section of the device according to the invention according to FIG. 3

FIG. 3 b

a second section of the embodiment according to Figure 3

FIG. 3 c

Fiber guiding element and half shell of the tunnel lining

FIG. 4

further variant of the invention

Figure 4 a

Section II from FIG. 4

FIG. 5

another possible embodiment of the invention

FIG. 6

schematic representation of the spinning process

Figures 7, 7 a, 7 b, 8, 8 a

further embodiments of the invention

FIG. 3 shows a first embodiment of the invention. The inventive mode of action will be explained with reference to this figure something. In the figure, a fiber guide element 3 can be seen, which is surrounded by a hollow cylindrical tunnel lining 17. The tunnel lining 17 may be in one piece or in several pieces, preferably in two pieces. The fiber conveying channel 4 is encased by the tunnel lining 17. The tunnel lining 17 is shaped in such a way that a shoulder 18 for the swirl chamber housing 15 is formed at the end of the fiber conveying channel 4. The end face of the shoulder 18 serves as a guide surface for the fluid emerging from the jet nozzles 13.1 (not shown). The outlet openings of the jet nozzles for the fluid (normally air) in the vortex chamber 14.1 have an elliptical shape (see Figure 3). In this first embodiment of the invention, the fiber guide element 3 and the associated tunnel lining 17 is installed in the swirl chamber housing 15. As will be shown in the following figures, the vortex chamber housing 15 does not necessarily include the fiber guide element 3 and its tunnel lining 17. The two last-mentioned elements can also have their own housing which adjoins the swirl chamber housing 15 (see, for example, FIG. 7). FIG. 3 also shows the spindle 7 with its yarn guide channel 8. FIG. 3 a shows the cross section 3 according to the section II. In this cross section, it can be seen that the device has four individual jet nozzles 13.1. The invention is not limited to the fact that it can only be used on devices with four jet nozzles. This means that it can also be used in devices with fewer or more than four jet nozzles. FIG. 3 also clearly shows how the jet nozzles 13.1 have an inclination α to the fiber transport direction (material flow direction 19). The inclination angle α may have an amount of 45 ° to 88 °, but the inclination angle α is preferably 70 ° to the material flow direction 19. The inclination angle of the end face of the heel 18 to the material flow direction in this first embodiment also has the same amount (shown are 70 ° ). In this first variant of the invention, it is also readily apparent how the end face 20 of the fiber guiding element 3 adjoining the vortex chamber 14.1 has the same angle of inclination to the material flow direction 19 as the bores of the jet nozzles 13.1. The angle of inclination of the holes corresponds to the flow direction of the exiting fluid. FIG. 3 b shows a section of this first variant according to the invention according to the section lines II-II. Here it is particularly easy to see how the end face 20 of the fiber guide element 3 in the swivel clamp is aligned with the end face of the shoulder 18. Furthermore, it can be seen in FIG. 3 a that the bores 13. 1 are arranged rotationally symmetrically.

FIG. 3 c shows a plan view of the fiber guiding element 3. It is clearly recognizable that the end face 20 of the fiber guiding element 3 adjoining the turbulence chamber has a conical surface. The conical end face 20 is cut off by a surface which forms the fiber delivery edge 6. From this figure, it can be clearly seen that the end face 20 can have a corresponding effect on the flow in the vortex chamber by appropriate design. The end face 20 therefore preferably has the same or a greater inclination to the material flow direction than the direction of flow of the exiting air (or fluids). As a result, the end face 20 can also serve as a guide surface for the exiting fluid or at least (with a greater or even vertical inclination) have no disturbing effect on the turbulent flow. In this figure, a half shell of the tunnel lining 17.1 is shown in the view. The tunnel lining may be in one piece or, as here shown, consist of two half-shells (upper half-shell not shown). Preferably, the end face of the shoulder 18 and the end face 20 have the same inclination, so that both surfaces are aligned. However, as will be explained in the following figure, the end face 20 may also have a different (greater or smaller) inclination than the face 18.

FIG. 4 shows an embodiment in which the end face 21 of the fiber guiding element 3 has a larger, i.e. has steeper inclination to the material flow direction 19 than the flow direction of the fluid (has inclination α). The surface 21 has a larger (steeper) inclination angle to the material flow direction 19 than the holes of the jet nozzles 13.1. Furthermore, the surface 21 is flat and not cone-shaped. The steeper angle of the face 21 causes that surface to have a different effect on the swirling flow. Depending on the application, it may prove advantageous to choose this variant of the end face or another angle of inclination. In addition to the larger (steeper) inclination of the end face 21, compared to the embodiment of the preceding figures, the surface of the end face 21 of the fiber guide element 3 in the vortex chamber is also not conical. This is particularly apparent from the figure 4a, which shows a section along the section line I-I of Figure 4.

FIG. 5 shows a further embodiment of the invention. The device in Figure 5 differs from the preceding devices in the fiber guide element 22. Again, the end face 20 of the fiber guide element 22 in the swirl chamber on the same slope as the jet nozzles 13.1 (inclination α). Also, the end face of the shoulder 18 has the same inclination, so that the surfaces 18 and 20 form an aligned, conical surface. Experiments have shown that it is best if the surfaces 18 and 20 have the same slope and are aligned. Preferably, they also have the same inclination as the jet nozzles.
However, variants are also conceivable in which (in contrast to FIG. 4) the end face of the fiber guiding element in the swirling chamber has a smaller inclination than the shoulder 18 (not shown in the figures).

Which variant is the most favorable depends on the particular application (for example, on the type of yarn). The inventive idea therefore also generally includes the possibility that the surfaces 18 and 20 have different inclinations. These statements are not limited to the variant shown in Figure 5.

The fiber guide element 22 of Figure 5 has a deflection point 23. The deflection point 23 is formed as an edge; but it can also find other types of deflection application. The remaining elements of the figure correspond to the preceding description, which is why will not be discussed here in detail. The mode of action of the deflection point 23 will be explained in the following FIG. Experiments have shown that, in addition to the use of the paragraph 18 as a guide surface for the air and the adaptation of the end face 20, even with the use of a deflection point 23 particularly good results in terms of yarn quality can be achieved.

Figure 6 tries to explain the operation of the deflection point 23 something. A more detailed explanation of the operation of such deflection can be found in the date of this application yet unpublished patent application of the applicant CH 0235/02. The fiber guide element 22 with deflecting leads a staple fiber strand 24 with a flat arrangement of the fibers in the direction of the spindle 7. In the figure can be seen what the effect of the deflection point 23 is: At the deflection point 23, the free fiber ends 25 of the fibers in the staple fiber 24 can stand (shown by way of example). It can be seen that the free fiber ends 25 include both front and rear fiber ends (corresponding left or right of the deflection point 23). By way of example, it can be seen how the staple fiber structure 24 has more free fiber ends on or on the surface of the staple fiber strand 24 after passing through the deflection point 23. The deflection point thus increases the number of free fiber ends on or in the immediate vicinity of the surface of the staple fiber strand. These free fiber ends can thus be better detected by the turbulence 11 (or more free fiber ends are detected) and placed around the inlet port 9. In this way, more free fiber ends spun, or more so-called. Umwindefasern be generated, which improves the spinning process and the quality itself. The spun yarn 10 thus has a higher proportion of Umwindefasern and therefore a higher strength, than yarns of spinning devices without deflection.

Figures 7, 7 a and 7 b show different variants for the execution of the paragraph of the tunnel lining. In all three figures it can be seen that the vortex chamber housing 15 connects to a housing 32 for the fiber guide element and the tunnel lining. For the invention, it is irrelevant whether the swirl chamber housing 15 also includes the housing 32 or whether it is two separate housing, which connect to each other. The invention and the inventive concept are applicable in both cases. The variant which is shown in FIG. 7 has a tunnel lining 26, which is shaped in such a way that the shoulder 29 with an inclination angle β is formed at the end of the fiber conveying channel 4. Preferably, the tunnel lining 26 has a thickness a which is in a range of 0.1 to 3 mm. The thickness a of the tunnel lining is preferably 0.5 mm. It can be seen how in the immediate vicinity of the front side of the shoulder 29 in the swirl chamber housing 15, the bore of the jet nozzle 13.1 is arranged. The shoulder 29 is arranged so close to the opening of the jet nozzle 13.1, that its end face serves as a guide surface for the exiting flow. In the figure it can be seen how the shoulder 29 is arranged in alignment with the bore. The bore is also arranged in alignment with the inner surface or lateral surface of the vortex chamber 14.1, so that the bore 13.1 "tangentially aligned" enters the inside of the vortex chamber housing 15, or tangentially into the vortex chamber 14.1. It can not be seen in this figure that the jet nozzle 13.1 can have an angle of inclination α to the material flow direction (see preceding figures). The inclination α of the jet nozzle to the material flow direction may be in a range of 45 ° to 88 °, preferably in a range of 58 ° to 75 °, but are preferred inclinations to the material flow direction of α equal to 60 ° or 70 ° (based on the angle α of the preceding figures). The inclination angle β of the front side of the shoulder 29 may have a different amount than the inclination angle α. The most suitable angle of inclination β can best be determined empirically for the specific application. Experiments have shown that in most cases an angle of inclination β is suitable is, which has the same amount as the angle α. However, the invention also provides for the use of different angles.

That the paragraph can be arranged in alignment with the holes, is particularly well seen in Figure 7 b. Here, the tunnel lining 27 has a shoulder 30 with an end face, which even has an angle of inclination of 90 °. However, the front side of the shoulder can also be in alignment if the angle of inclination is not 90 ° (see, for example, FIG. 7).

The fact that the bores of the jet nozzles can also be at a distance from the shoulder of the tunnel lining is shown, for example, in FIG. 7 a. The tunnel lining 28 has in FIG. 7a a shoulder 31 which (measured from the foot of the shoulder) has a distance d from the geometric center of the bore 13.1.

From the comparison of the paragraphs shown in Figures 7, 7 a and 7 b, the idea of the invention is particularly well recognizable: It is the idea to provide a heel or an area in the middle or immediate vicinity of the outlet openings of the fluid device that the exiting fluid (Air) serves as a guide surface. These baffles "direct" the exiting flow or vortex flow in an appropriate manner, so that the turbulence is optimally adapted to the needs. It is essential that the paragraphs of the tunnel linings or possibly even the vortex chamber 14.1 facing or adjacent end faces of the fiber guide elements conduct the vortex flow low. This is an essential functional feature of the invention. It is the most favorable for the particular application form and arrangement of the paragraph to choose. The heel can therefore be arranged flush with a corresponding inclination angle or at a corresponding distance from the outlet opening of the bores 13.1. Which is the cheapest option is empirically determined in the specific application (eg depending on the type of yarn or quality to be produced). The goal is in any case to use the shoulder or the end face of the fiber guide element as a guide surface and thus to achieve optimum flow conditions or vortex flows for yarn formation. The deliberate use of these surfaces as fins for the turbulent flow produces noticeable improvements of the spinning process. Although prior art devices are known which include heel chambers with shoulders (see, for example, Figure 2), it has heretofore been unknown to conceive such heels as baffles. Such known from the prior art paragraphs were previously contained in the vortex chambers production technology or had at least never held the inventive function.

Figures 8 and 8 a show preferred arrangements of the jet nozzles. The two figures correspond to the cross section I-I from FIG. 3, with a correspondingly adapted bore arrangement (in comparison to the arrangement of FIG. 3). It can be clearly seen that the vortex chamber housing has a circular inner surface and the bore of each jet nozzle "tangentially aligned" runs in the inner surface of the vortex chamber housing. Of course, the inventive concept can also be implemented in devices in which the holes are not tangent in the cross-section of the vortex chamber housing. Figures 8 and 8 a show therefore only preferred embodiments for the implementation of the invention. FIG. 8 shows a variant in which the longitudinal axis of the bore 33 of the one jet nozzle runs parallel to the fiber guiding surface 16. The tangential and aligned transition from the bore to the circular inner surface of the vortex chamber thus takes place in the zenith 34. Preferably, the fluid device in the vortex chamber housing a total of three or preferably four rotationally symmetrically arranged jet nozzles 13.1.

Also, the figure 8 a shows four rotationally symmetrically arranged jet nozzles. In contrast to Figure 8, however, the holes are arranged rotated about the longitudinal axis of the device (compare with Figure 8). Thus, the bore 33 of a jet nozzle can also be arranged such that its longitudinal axis 35 pierces the lateral surface of the vortex chamber in the zenith 34.
The bore 33 of a jet nozzle may also be arranged in a region between the two latter positions. Preferably, a plurality of jet nozzles are used, which are arranged or distributed rotationally symmetrically about the longitudinal axis of the device (see Figures 8 or 8 a).

The invention and the inventive concept are not limited to the possibilities and embodiments explicitly mentioned here. The described and shown variants are intended more as a suggestion for the person skilled in the art to use the idea of the invention as favorably as possible for the respective case. Of the described embodiments, therefore, further advantageous arrangements and combinations are readily derivable, which also reflect the inventive concept and should be protected by this application. Some of the features disclosed and described above in the specification could also be claimed individually. It would also be conceivable to claim some of these features from the description in a different combination than in the following claims. The invention is particularly suitable in devices for air spinning, wherein air is preferably used as the fluid.

Legend

1

Staple fiber strand

2

Pair of delivery rollers

3

Fiber guide element

3.1

Fiber guiding element of the prior art

3a

Sheath of the fiber guiding element 3.1

4

Fiber conveying channel

5

Spiral fiber guide surface

6

Fiber delivery edge

7

spindle

8th

yarn guide

9

Inlet mouth Garnführungskanal

10

woven thread

11

vortex flow

12

Free fiber ends

13.1

jets

14

room

14.1

swirl chamber

15

Eddy chamber housing

16

Level fiber guide surface

17

tunnel lining

17.1

Half shell of the tunnel lining

18

paragraph

19

Material flow direction

20

End face of the fiber guide element 3 in the vortex chamber

21

End face of the fiber guide element with a greater inclination than the flow direction of the fluid

22

Fiber guiding element with deflection point

23

deflection

24

Staple fiber bandage with flat arrangement of the fibers

25

Free fiber ends

26

tunnel lining

27

tunnel lining

28

tunnel lining

29

Heel with angle of inclination β

30

Paragraph with angle of inclination 90 °

31

Paragraph by far d

32

Housing for fiber guide element and tunnel lining

33

Bore of the first jet nozzle

34

zenith

35

Longitudinal axis of the bore 33rd

α

Inclination of the jet nozzles to the fiber or material transport direction

β

Inclination angle of the paragraph

a

Thickness of the tunnel lining

d

Distance shoulder and geometric center of the hole 13.1

Claims (11)

1. A device for the manufacture of a spun fibre or thread from a staple sliver, containing a fibre guide element, a fibre conveying channel, an eddy chamber housing connected to the fibre guide element, whereby the fibre guide element exhibits a face surface which delimits the eddy chamber which is formed, the eddy chamber housing contains a spindle with a yarn guide channel allocated in a distance to the fibre guide element, whereby the eddy chamber housing contains a fluid device with at least one jet nozzle for creating an eddy current around the intake aperture mouth of the yarn guide channel,
   characterised in that
   the fibre conveying channel (4) exhibits a tunnel cladding (17, 26, 27, 28), which is shaped in such a way that at the end of the fibre conveying channel (4) a shoulder (18, 29, 30, 31) to the eddy chamber housing (15) is formed, whereby the front face of the shoulder serves as a deflection guide surface for the fluid, which emerges from the jet nozzle(s) (13.1.).
2. The device according to Claim 1, characterised in that the front face (20, 21) of the fibre guide element (3, 22) in the eddy chamber (14.1) exhibits the same or a greater inclination than the direction of flow of the fluid emerging from the fluid device (13.1).
3. The device according to Claim 1 or 2, characterised in that the front face of the shoulder (18) exhibits the same inclination angle (α) as the direction of flow of the fluid emerging from the fluid device (13.1).
4. The device according to one of the foregoing Claims, characterised in that the shoulder (18, 29, 30) is arranged flush with the mouth aperture of the jet nozzle (13.1).
5. The device according to one of the foregoing Claims, characterised in that the front face (20, 21) of the fibre guide element (3, 22) in the eddy chamber (14.1) and/or the hole of each nozzle jet (13.1) exhibits an inclination angle (α) of 45 to 88 degrees or 58 to 75 degrees, for preference 70 degrees of 60 degrees to the direction of the material flow (19).
6. The device according to Claim 1, characterised in that the tunnel cladding (17, 17.1, 26, 27, 28) exhibits a thickness (a) of 0.1 to 3 mm, and for preference 0.5 mm.
7. The device according to one of the foregoing Claims, characterised in that the distance interval (d) between the step (31) and the centre point of the hole of the jet nozzle (13.1) or jet nozzles amounts to 0.9 mm to 1.3 mm, and for preference 1.1 mm.
8. The device according to one of the foregoing Claims, characterised in that the eddy chamber housing (15) exhibits a circular inner surface and the hole of each jet nozzle (13.1) passes tangentially flush into the cross-section of the eddy chamber housing (15).
9. The device according to Claim 8, characterised in that the longitudinal axis (35) of the hole (33) of the at least one jet nozzle lies parallel to the fibre guide surface (16) of the fibre conveying channel or the geometrical point of intersection between the longitudinal axis (35) of the hole (33) of the at least one jet nozzle and the casing surface of the eddy chamber (14.1) at the zenith point (34) of the cross-section of the eddy chamber housing (15), or that the longitudinal axis (35) of the hole (33) of the at least one jet nozzle lies in the area between the said two positions.
10. The device according to Claim 9, characterised in that the fluid device (13.1) in the eddy chamber housing (15) exhibits a total of 3, and for especial preference 4, rotationally symmetrically arranged jet nozzles (13.1).
11. The device according to one of the foregoing Claims, characterised in that the fibre guide surface (16) exhibits a deflection point (23), which causes a deflection of the staple sliver (24), and for preference the deflection point (23) is formed as a supplementary edge.

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