Device for feeding at least one sliver to a sliver-processing textile machine, spinning preparation assembly having such a device, and corresponding method

Abstract

The invention relates to a device for feeding at least one sliver (5), which can be provided by a storage container (4) mounted on a base (6), to a sliver-processing textile machine (3), comprising: a longitudinal beam (7) which extends along a longitudinal axis (L_7) and can be supported on the base (6) via a support assembly (18) and which can be moved parallel to an axis (Z) oriented perpendicularly to the longitudinal axis (L_7); and a guide device (14) for guiding the at least one sliver (5) towards the textile machine (3), the guide device being connected to the longitudinal beam (7) and comprising a supply roller (10), the supply roller (10) being rotatable by means of a drive device (11) such that the sliver (5) can be drawn from the storage container (4). A control device (34) is provided which is designed and configured such that when the longitudinal beam (7) is moved by a stroke distance along the axis (Z), the supply roller (10) is rotated by the drive device (11) on the basis of the stroke distance.

Description

[0001] Internal file number P249929WO1 17.07.2025

[0002] Device for feeding a fiber ribbon processing textile machine with at least one fiber ribbon, arrangement in the spinning preparation area with such a device and a corresponding method

[0003] Description

[0004] The invention relates to a device for feeding a fiber ribbon processing textile machine with at least one fiber ribbon, which can be supplied from a feed container arranged on a floor, an arrangement in the spinning preparation area with such a device, and a corresponding method for operating the device. Such devices can also be referred to as creels.

[0005] The fiber sliver is drawn from the feed hopper via the creel and fed to the textile machine. If the sliver breaks or runs dry, the textile machine operator must stop the process and ensure that more fiber sliver is supplied to the textile machine via the creel, for example, by changing the feed hopper. Depending on the operator's height, the creel may be positioned so high in its operating position that the operator cannot reach it. To enable the operator to reach the creel for maintenance, height-adjustable creels are known from the prior art; these can be moved from the operating position to a maintenance position.

[0006] For example, DE 10 2022 128 352 A1 discloses a creel device for feeding a fiber ribbon processing textile machine with a plurality of fiber ribbons that can be provided in movable feed containers, comprising: a height-adjustable longitudinal beam which is arranged above a mounting surface for setting up the feed containers, and a guide device arranged on the longitudinal beam for guiding the fiber ribbons drawn from the feed containers to the textile machine, wherein the creel device has a height adjustment device operatively connected to the longitudinal beam with a drive device for driven displacement of the longitudinal beam along a vertical axis arranged perpendicular to the mounting surface.

[0007] The object of the invention is to propose a height-adjustable device for feeding a fiber tape processing textile machine with at least one fiber tape, which enables low-interference operation of the device and the textile machine, as well as a corresponding arrangement in the spinning preparation with such a device and a corresponding method.

[0008] To solve the problem, a device for feeding a fiber tape processing textile machine with at least one fiber tape, which can be provided from a feed container arranged on a floor, is proposed, comprising: an Internal file number P249929WO1 17.07.2025

[0009] A longitudinal beam extending along a longitudinal axis, which can be supported on the ground by a support arrangement and can be displaced parallel to a vertical axis oriented perpendicular to the longitudinal axis, and a guide device for guiding the at least one fiber strip towards the textile machine, wherein the guide device is connected to the longitudinal beam and comprises a feed roller which can be driven by a drive device in a rotating manner, so that the fiber strip can be withdrawn from the feed container by means of the feed roller, wherein a control device for controlling the device is provided, which is designed and configured such that when the longitudinal beam is displaced along the vertical axis by a stroke, the feed roller is driven by the drive device depending on the stroke.

[0010] The displacement of the longitudinal beam changes the clamping length of the fiber tape and consequently its tension. By driving the feed roller in relation to the stroke, the tape tension can be regulated, thus preventing, for example, tape breaks caused by increased tension. In particular, the device according to the invention allows the tape tension to be kept constant or substantially constant when the longitudinal beam is displaced.

[0011] In one possible embodiment, the control device can be designed and configured such that when the longitudinal beam is moved along the vertical axis by the stroke, the feed roller is rotated by the drive device by an angle of rotation, depending on the stroke.

[0012] In one possible embodiment, the guide device can include an upper roller which, together with the feed roller, forms a roller pair between which the fiber strip can be clamped. The longitudinal beam can have a machine-side end that can be positioned opposite the textile machine.

[0013] The control device can be designed and configured such that, in the event of displacement of the longitudinal beam along the vertical axis by the stroke from a first position to a second position, the first position being located between the ground and the second position, the feed roller is driven in such a way that a point on the feed roller, opposite the upper roller, rotates in the direction of the machine-side end of the longitudinal beam.

[0014] The control device can alternatively or in combination be designed and configured such that when the longitudinal beam is displaced along the vertical axis by the stroke from a first position to a second position, the second position being located between the ground and the first position, the feed roller is driven in such a way (Internal file number P249929WO1 17.07.2025) that a point on the feed roller, opposite the upper roller, rotates away from the machine-side end of the longitudinal beam.

[0015] Furthermore, to solve the problem, a method for operating a device according to a previously described embodiment is proposed, comprising the following steps: displacement of the longitudinal beam along the vertical axis by a stroke, and rotation of the feed roller by the drive device by an angle of rotation as a function of the stroke.

[0016] To solve the problem, an arrangement in the spinning preparation is further proposed, comprising: a device for feeding a fiber ribbon processing textile machine with at least one fiber ribbon, which can be provided from a feed container arranged on a floor, according to a previously described embodiment; and a fiber ribbon processing textile machine, which can be fed with at least one fiber ribbon by the device.

[0017] The following describes a device according to the invention with reference to the figure drawings. It shows:

[0018] Figure 1 shows a perspective view from an oblique angle above of an arrangement with a tracker and a device according to the invention for feeding the tracker;

[0019] Figure 2 shows a perspective side view of the device for feeding the conveyor from Figure 1, wherein the gate device is arranged in a first height position;

[0020] Figure 3 shows a perspective side view of the device for feeding the conveyor from Figure 1, wherein the gate device is arranged in a second height position.

[0021] Figure 4 shows a schematic side view of the arrangement from Figure 1, with the longitudinal beam being moved from the operating position to the maintenance position; and

[0022] Figure 5 shows another schematic side view of the arrangement from Figure 1, wherein the longitudinal beam is moved from the maintenance position to the operating position.

[0023] Figures 1 to 5, which are described together below, show an arrangement 1 comprising a textile machine, here configured as a drawing unit 3, and a device 2 for feeding the drawing unit 3 according to an embodiment of the present invention. The device 2 for feeding the drawing unit 3 can also be referred to as a creel device. The creel device 2 according to the invention, which is shown in more detail in Figures 2 and 3, serves, in a manner known per se, to feed the downstream drawing unit 3 with one or a plurality of movable internal file number P249929WO1 17.07.2025

[0024] The fiber tapes 5 are provided by the feed containers 4. The drawing device 3 serves, in a manner known per se, to homogenize the fiber tapes 5 provided by the upstream creel device 2. For the sake of clarity, only a subset of the, here by way of example, eight feed containers 4 and eight fiber tapes 5 are provided with the reference numerals.

[0025] To illustrate the orientation of the arrangement 1 in space, a longitudinal direction X, a transverse direction Y, and a vertical direction Z are shown, defined in terms of a fixed Cartesian coordinate system and indicated by corresponding arrows. The vertical axis Z is perpendicular to a fixed surface 6, in particular the floor of a spinning mill, on which the arrangement 1 is to be set up. Terms such as "below," "below," "above," or "above" represent spatial references to the arrangement 1 in the direction of the vertical axis.

[0026] The gate assembly 2 has a height-adjustable longitudinal beam 7 extending along a longitudinal axis L_7. In this case, the longitudinal axis L_7 runs parallel to the X-axis. The longitudinal beam 7 is arranged parallel to a defined support surface 8, on which the feed containers 4 are placed on the floor 6. Figure 1 shows an example of the gate assembly 2 with eight discharge points 9, while Figures 2 and 3 show six discharge points 9, enabling the simultaneous discharge of fiber strips 5 from the feed containers 4. The feed containers 4 are shown as round cans and are arranged in two rows below the longitudinal beam 7.

[0027] Figures 2 and 3 show the gate arrangement 2 according to the invention in more detail, which, here only by way of example, has six of the take-off points 9 for a total of six of the feed containers 4. The fiber strips 5 provided by the feed containers 4 are guided to the drawing device 3 via a guide device 14, which is arranged on the longitudinal beam 7. The guide device 14 comprises a feed roller 10 for each take-off point 9, which can be driven by a common motor 11, in particular an electric motor, and by means of which the fiber strips 5 can be taken from the feed containers.

[0028] The motor 11 can be arranged at an end of the saw assembly 2 on the longitudinal beam 7, away from the drawing unit 3, and can be driven by a drive train preferably housed in the longitudinal beam 7, connecting it to the feed rollers 10. The motor 11 can be controlled by a control unit 34. The control unit 34 can be designed separately, as shown here, or it can be integrated into the control unit of the drawing unit 3. Each driven feed roller 10 is associated with a corresponding upper roller 12 of the guide unit 14, with which the respective feed roller 10 forms a roller pair 13, between which the respective fiber strip 5 is clamped and guided. Internal file number P249929WO1 17.07.2025

[0029] To guide the fiber strips 5 drawn from the feed containers 4 to the drawing unit 3, the guide device 14 comprises a guide element 15 at each of the draw-off points 9, which is positioned upstream of the respective pair of rollers 13. The respective guide element 15 can, for example, have a strip guide equipped with an opening, particularly in the form of an eyelet, which can be held on the longitudinal beam 7 by a retaining rod. During operation of the arrangement 1, the drawn fiber strip 5 passes through the guide element 15, is deflected in the longitudinal direction X, and then passes through the roller gap of the pair of rollers 13 at the respective draw-off point 9.

[0030] In the area of ​​the machine-side end of the longitudinal beam 7 facing the drawing device 3, open guide grooves 16 of the guide device 14 are arranged, through which the fiber strips 5 are guided separately from one another. The guide grooves 16 define the contact point between the guide device 14 and the fiber strip 5 that is closest to the drawing device 3.

[0031] Each of the take-off points 9 is further assigned a sensor 17, in particular an optical sensor, which can be arranged behind the respective pair of rollers 13 and monitors the respective fiber strip 5. In this way, it can be monitored whether all the fiber strips 5 entering the drawing unit 3 are present. The sensors 17 are connected to the control unit 34. If one of the sensors 17 detects a strip break because, during operation, one of the sensors 17 detects no fiber strip or a stationary fiber strip, the control unit 34 can stop the rollers of the drawing unit 3 and the feed rollers 10 of the creel unit 2.

[0032] Subsequently, a machine operator can rectify the fault by adjusting the height of the gate device 2 from a first height position shown in Figure 2, which can also be referred to as the operating position, to a second height position shown in Figure 3, which can also be referred to as the maintenance position. This process is also illustrated in Figure 4, as explained further below. The distance along the height axis Z between the first height position and the second height position can be referred to as the stroke D.

[0033] In order to move the height-adjustable longitudinal beam 7 into the maintenance position, for example upon detection of a belt breakage, the gate device 2 can have a height-adjustable support arrangement 18 for driven movement of the longitudinal beam 7 along the vertical axis Z, which can be controlled in particular via the control device 34.

[0034] The support arrangement 18, which is operatively connected to the longitudinal beam 7, can have two support columns 19 on which the longitudinal beam 7 is supported. The respective support column (Internal file number P249929WO1, 17.07.2025)

[0035] The support assembly 19 comprises a base 20 erected on the stationary ground 6 and a displacement element 21 arranged to be displaceable relative to the base 20 along the vertical axis Z. Furthermore, the support assembly 18 includes a drive unit 22 with an actuator 23, in particular pneumatically or electrically operated, for each support column 19, wherein the displacement element 21 may comprise or be a cylinder of the actuator 22. In Figure 2, the cylinder is shown in an extended position in which the longitudinal beam 7 is held in the operating position. In Figure 3, the displacement element 21 is shown in a retracted position in which the longitudinal beam 7 is held in the maintenance position, which is lower than the operating position. The respective actuator 23 may be housed in the base 20 or in a column section 24 that is attached to the underside of the longitudinal beam 7.It goes without saying that the respective support column 19 may, if necessary, have a covering to shield the moving parts of the support arrangement 18.

[0036] In the maintenance position shown in Figure 3, the longitudinal beam 7 can be arranged at a height that allows the operator to reach the longitudinal beam 7 or the guide device 14 without aids. In other words, in the maintenance position, the respective discharge point 9 on the longitudinal beam 7 is easily and conveniently accessible from the hall floor 6, while maintaining sufficient distance between the longitudinal beam 7 and the storage containers 4.

[0037] In the operating position shown in Figure 2, the longitudinal beam 7 can be arranged in a first height position, the operating position, which is optimal for ongoing operation. In this position, the fiber strips 5 can enter an entry point 25 of the drawing device 3 at an entry angle that is optimal for the drawing device 3, as shown in Figures 1 and 4. A height difference between a discharge point 26 of the creel device 2, formed by the guide grooves 16, and the entry point 25 of the drawing device 3 can be set by means of the support arrangement 18. For example, for wrapping around the rider rollers of the drawing device 3 arranged in the entry point 25, it is advantageous if the fiber strips 5 enter from an oblique angle above, as shown in Figures 1, 4, or 5.Furthermore, the longitudinal beam 7 can be moved along the vertical axis Z by means of the support arrangement 18 when stationary as well as during operation, whereby the longitudinal beam 7 is always aligned parallel to the mounting surface 8.

[0038] An operating unit 27 can be arranged on at least one of the support columns 19, via which the machine operator can, for example, restart the spreading unit 3, in particular its rollers, and the motor 11 for driving the feed rollers 10 at the gate unit 2 after a can change. The control unit 34 can be integrated into the support column. The operating unit 27 is, here by way of example, attached to the column section 24 closest to the spreading unit 3, but could also be provided at another location easily accessible to the machine operator. Furthermore, the Internal File Reference P249929WO1 17.07.2025

[0039] The machine operator can use the control unit 27 to switch the drive unit 22 in order to move the longitudinal beam 7 up and down. Furthermore, the control unit 27 can store preset heights ("memory function") to which the longitudinal beam 7 is moved when the desired height is selected. It is also conceivable that a corresponding control unit could alternatively or additionally be provided on an operating terminal 41 of the stretching device 3, an operating panel 42 of the stretching device 3, or on a mobile device.

[0040] Figures 4 and 5 each schematically depict a portion of the track assembly 3 together with the longitudinal beam 7. For clarity, only the first two discharge points 9, 9' of the longitudinal beam 7 are shown, and the support arrangement is omitted. The longitudinal beam 7 is shown in both the operating and maintenance positions, with the operating and maintenance positions separated vertically by the stroke D. The maintenance position is indicated in Figures 4 and 5 by the addition of an asterisk (*) to the reference symbols and the representation of the fiber band 5* as a dashed line. In the operating position, the fiber band 5 is shown as a solid line.

[0041] Figure 4 shows the relocation of the longitudinal beam 7 from the operating position to the maintenance position (see arrow P). In other words, the relocation of the longitudinal beam 7 along the vertical axis Z by a stroke D from a first position to a second position is shown, the second position being located between the floor 6 and the first position.

[0042] Figure 5 shows the relocation of the longitudinal beam 7 from the maintenance position to the operating position (see arrow P). In other words, the relocation of the longitudinal beam 7 along the vertical axis Z by a stroke D from a first position to a second position is shown, with the first position being located between the floor 6 and the second position.

[0043] In Figures 4 and 5, the fiber strips 5, 5* are drawn from associated feed containers 4 by roller pairs 13, 13' at the discharge points 9, 9* in the operating position and the maintenance position, respectively, and subsequently guided through the guide grooves 16 towards the rider rollers of the infeed point 25. The fiber strips 5, 5* are supported by the bottom of the guide grooves 16. The fiber strips 5, 5* are clamped by the roller pairs 13, 13', so that the roller pairs 13, 13' each form a first clamping point at the discharge point 9, 9', where the respective fiber strip 5, 5* is secured. The fiber strips 5, 5* are also clamped between the rider rollers of the infeed point 25 of the drawing unit 3, thus forming a second clamping point. Internal file number P249929WO1 17.07.2025

[0044] In the operating position, the inlet point 25, or the second clamping point, has a distance D5.0 from the bottom of the guide grooves 16. The bottom of the guide grooves 16 also has a distance D5.1 from the first discharge point 9 and a distance D5.2 from the second discharge point 9'. The clamping length of the fiber tape 5 between the first discharge point 9 and the second clamping point is therefore the sum of the distances D5.0 and D5.1. Similarly, the clamping length of the fiber tape 5 between the second discharge point 9' and the second clamping point is the sum of the distances D5.0 and D5.2.

[0045] In the maintenance position, the clamping length of the fiber tape 5* between the first pull-off point 9 and the second clamping point is the sum of the distances D5.0* and D5.1*. A clamping length of the fiber tape 5* between the second pull-off point 9' and the second clamping point is the sum of the distances D5.0* and D5.2*.

[0046] Figures 4 and 5 show that the individual distances D5.1, D5.1* and D5.2, D5.2* are independent of the position of the longitudinal beam, whereas the distance D5.0 becomes larger with increasing stroke D compared to the distance D5.0*.

[0047] Thus, the clamping length of the fiber bands 5, 5* increases when the longitudinal beam 7 is moved from the maintenance position towards the operating position (Figure 5). This increase is the same for all fiber bands 5 and, depending on the stroke D, corresponds to the difference between the distance D5.0 and D5.0*. Due to the fixed clamping of the fiber bands 5, 5* at the first and second clamping points, the fiber bands 5, 5* are stretched to such an extent that the band tension increases. This can lead to breakage of the fiber bands 5, 5*.

[0048] To avoid this, a strip tension compensation device is provided, designed such that when the longitudinal beam 7 is displaced parallel to the vertical axis, the strip tension of the fiber strip 5, 5* remains constant or substantially constant. The strip tension can be considered substantially constant if it changes by less than 10%, in particular less than 5%, 3%, or 1%. In this case, the strip tension compensation device is formed by the motor 11, the drive train, the feed rollers 10, and the control device 34.

[0049] When the longitudinal beam 7 is moved from the maintenance position towards the operating position (Figure 5), the feed roller 10 is rotated by the motor 11 via the drive train by an angle α, depending on the current stroke D of the longitudinal beam 7 or its current height position, such that additional fiber strip is fed into the area between the two clamping points. In Figure 5, the feed rollers 10 are thus rotated counterclockwise. In other words, a point on the surface of the feed roller 10, opposite the upper roller 12, is rotated towards the machine-side end of the longitudinal beam. Internal reference P249929WO1 17.07.2025

[0050] The current rotation angle α of the feed rollers 10 is controlled by the control unit 34 such that the arc length corresponding to angle α on the circumference of the feed rollers 10 corresponds to the current difference between the distance D5.0 and D5.0*. Since the difference between the distance D5.0 and D5.0* depends on the current stroke D, the rotation angle α of the feed rollers is also controlled as a function of the stroke D. In this described case, the strip tension can be considered theoretically constant over the stroke D.

[0051] If the longitudinal beam 7 is moved from the maintenance position towards the operating position during operation of the stretching device 3, the previously described rotation angle α is applied to the feed rollers 10 in addition to their operating speed. The additional rotation angle α and the operating speed are oriented in the same direction, so the additional rotation angle α must be added to the rotation angle defined by the operating speed.

[0052] When the longitudinal beam 7 is moved from the operating position towards the maintenance position (Figure 4), the clamping length of the fiber strips 5, 5* is reduced. Due to the fixed clamping of the fiber strips 5, 5* at the first and second clamping points, the fiber strips 5, 5* sag, which can lead to a deterioration of the uniformity in the stretching device 3.

[0053] To prevent this sagging, the feed roller 10 is rotated by the motor 11 via the drive train, depending on the stroke D of the longitudinal beam 7, so that fiber strip is pulled out of the area between the two clamping points. In Figure 4, the feed rollers 10 are thus rotated clockwise. The current rotation angle α of the feed rollers 10 is controlled by the control unit 34 such that the arc length corresponding to angle α on the circumference of the feed rollers 10 corresponds to the current difference between the distance D5.0 and D5.0*. In this described case as well, the strip tension can be considered theoretically constant over the stroke D.

[0054] If the longitudinal beam 7 is moved from the operating position towards the maintenance position during operation of the stretching unit 3, the previously described angle of rotation α is applied to the feed rollers 10 in addition to their operating speed. The additional angle of rotation α and the operating speed are oriented in opposite directions, so the additional angle of rotation α must be subtracted from the angle of rotation defined by the operating speed. Internal file reference P249929WO1 17.07.2025

[0055] Reference sign

[0056] 1 Order 36

[0057] 2 Device 37

[0058] 3 Track direction 38

[0059] 4 storage containers 39

[0060] 5 fiber tape 40

[0061] Floor 6, 41 Operating Terminal

[0062] 7 longitudinal beams 42 control panel

[0063] 8 Installation area

[0064] 9 Deduction point D Distance

[0065] 10 Feed roller L Longitudinal axis

[0066] 11 Motor X Longitudinal direction

[0067] 12 Top roller Y transverse direction

[0068] 13 pairs of rollers Z vertical direction

[0069] 14 Guide device

[0070] 15 guide element

[0071] 16 guide groove

[0072] 17 Sensor

[0073] 18 Support arrangement

[0074] 19 pedestal column

[0075] 20 Foot section

[0076] 21 Relocation section

[0077] 22 Drive unit

[0078] 23 Actuator

[0079] 24 column section

[0080] 25 Entry point

[0081] 26 Delivery point

[0082] 27 Control unit

[0083] 28 Device

[0084] 29 support

[0085] 30 floor swivel bearings

[0086] 31 Swivel arm

[0087] 32 beam pivot bearings

[0088] 33 Drive unit

[0089] 34 Control device

[0090] 35

Claims

Internal file number P249929WO1 17.07.2025 Patent claims 1. Device for feeding a fiber ribbon processing textile machine (3) with at least one fiber ribbon (5) which can be provided from a feed container (4) arranged on a base (6), comprising: a longitudinal beam (7) extending along a longitudinal axis (L_7) and which can be supported on the base (6) by means of a support arrangement (18) and which can be displaced parallel to an axis (Z) oriented perpendicular to the longitudinal axis (L_7), and a guide device (14) for guiding the at least one fiber ribbon (5) towards the textile machine (3), wherein the guide device (14) is connected to the longitudinal beam (7) and comprises a feed roller (10) which can be driven in a rotating manner by a drive device (11) so that the fiber ribbon (5) can be withdrawn from the feed container (4) by means of the feed roller (10), characterized by a control device (34) which is designed and configured as follows:that when the longitudinal beam (7) is displaced along the axis (Z) by a stroke (D), the feed roller (10) is driven by the drive unit (11) depending on the stroke (D).

2. Device according to claim 1, characterized in that the control device (34) is designed and configured such that when the longitudinal beam (7) is displaced along the axis (Z) by the stroke (D), the feed roller (10) is rotated by the drive device (11) by an angle of rotation (a) depending on the stroke (D).

3. Device according to one of claims 1 or 2, characterized in that the guide device (14) comprises an upper roller (12) which forms a roller pair (13) with the feed roller (10) between which the fiber strip (5) can be clamped. Internal file number P249929WO1 17.07.2025 4. Device according to one of claims 1 to 3, characterized in that the longitudinal beam (7) has a machine-side end that can be placed opposite the textile machine (3).

5. Device according to claim 3, characterized in that the control device (34) is designed and configured such that when the longitudinal beam (7) is displaced along the axis (Z) by the stroke (D) from a first position to a second position, wherein the first position is arranged between the floor (6) and the second position, the feed roller (10) is driven such that a point on the feed roller (10), which is opposite the upper roller (12), rotates in the direction of the machine-side end of the longitudinal beam.

6. Device according to one of claims 3 or 4, characterized in that the control device (34) is designed and configured such that when the longitudinal beam (7) is displaced along the axis (z) by a stroke (D) from a first position to a second position, wherein the second position is arranged between the base (6) and the first position, the feed roller (10) is driven such that a point on the feed roller (10), which is opposite the upper roller (12), rotates away from the machine-side end of the longitudinal beam.

7. A method for operating a device according to any one of claims 1 to 6 comprising the following steps: Displacement of the longitudinal beam (7) along the axis (Z) by a stroke (D), and Rotation of the feed roller (10) as a function of the stroke (D) by the drive device (11) by an angle of rotation (a). Internal file number P249929WO1 17.07.2025 8. Arrangement in the spinning preparation, comprising: a device (2) for feeding a fiber ribbon processing textile machine (3) with at least one fiber ribbon (5) which can be provided from a feed container (4) arranged on a floor (6), according to one of claims 1 to 6; and a fiber ribbon processing textile machine (3) which can be fed by the device (2) with at least one fiber ribbon (5).

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