Fibre thread stretching unit with additive supply

Abstract

The invention relates to a fiber sliver drawing unit for a spinning preparation machine, a corresponding spinning preparation machine, a storage device for temporarily storing a defined quantity of fiber sliver, and a method for applying an additive to a fiber sliver intended for further processing in a spinning machine. The aim is to provide a simpler, more cost-effective, and lower-maintenance method of additive supply, thereby particularly improving the spinning station or...To make the spinning machine less frequently needing cleaning and generally cheaper to manufacture and operate, it is provided that a fiber strip drawing unit according to the invention for a spinning preparation machine has a fiber strip inlet for receiving a fiber strip, at least one drawing and warping field in the transport direction of the fiber strip limited by a pair of rollers for stretching the received fiber strip, and a fiber strip outlet for directing the stretched fiber strip towards a subsequent fiber strip processing device, wherein an additive supply device for applying an additive to the fiber strip is arranged in an area enclosed by the fiber strip inlet and the fiber strip outlet.

Description

[0001] The invention relates to a fiber ribbon drawing unit for a spinning preparation machine, a corresponding spinning preparation machine, a storage device for temporarily storing a defined quantity of fiber ribbon, and a method for applying an additive to a fiber ribbon intended for further processing in a spinning machine.

[0002] In general, a spinning machine spins fiber slivers, which are placed in a can and fed to a spinning unit, into thread or yarn. Common spinning methods with simultaneous winding of the yarn onto a bobbin are rotor spinning and air spinning. In these methods, a fiber sliver is generally fed to the spinning unit for spinning a yarn from the sliver, the spun yarn is then unwound from the spinning unit and transferred to a winding device for winding onto a bobbin. In particular, in air spinning, the fiber sliver is fed via a drafting unit to an air spinneret, in which the outer fibers of the sliver are wound around an inner fiber core within a vortex chamber of the air spinneret by means of a vortex airflow generated by air jets at the inlet opening of the air spinneret. This process ultimately forms the outer fibers that are crucial for the desired strength of the yarn.This can generally be done with fibers made from various materials, including natural fibers such as cotton, synthetic fibers such as polyester, and mixtures of natural and synthetic fibers.

[0003] In the prior art of spinning polyester fibers using an air-jet spinning machine, it is proposed to apply an additive either to the air-jet spinning nozzle itself or to the polyester fibers to be spun within the processing area of ​​the respective air-jet spinning machine. This is because only such an additive can prevent the accumulation of polymer residues, polyester fiber fragments, and / or avivages inside the spinning nozzle, and in particular on the surface of the spinning cone of a yarn-forming element. Such accumulations would significantly disrupt the air-jet spinning process and considerably reduce the spinning result and thus the yarn quality.

[0004] However, introducing an additive in the air-jet nozzle area has several disadvantages. First, the air jets within the spinneret, as well as other spinneret components, can become clogged by excess additive deposits, disrupting the spinning process and resulting in yarn with reduced strength and quality. Furthermore, the introduction of excess additive necessitates time-consuming and costly regular cleaning of the spinning units of a spinning machine. Finally, a spinning machine has numerous spinning units, each requiring its own additive feed, leading to high production costs and significant maintenance requirements.

[0005] Further relevant information can be found in documents US 2004 / 146711 A1 and EP 2 980 285 A2.

[0006] The invention is therefore based on the objective of providing a simpler, more cost-effective and lower-maintenance method of additive supply, which in particular makes the spinning station or spinning machine cheaper to manufacture and operate.

[0007] The object of the invention is achieved by a fiber sash drawing unit for a spinning preparation machine, in particular for a carding machine or drawing unit, according to claim 1, a spinning preparation machine according to claim 11, and a method for applying an additive to a fiber sash according to claim 13. Advantageous embodiments of the invention are specified in the dependent claims.

[0008] The fiber tape drawing machine according to the invention has a fiber tape inlet for receiving a fiber tape, at least one drawing and warping field in the transport direction of the fiber tape bounded by a pair of rollers for drawing the received fiber tape, and a fiber tape outlet for directing the drawn fiber tape towards a subsequent fiber tape processing device, in particular a storage device for temporarily storing a defined quantity of the drawn fiber tape or a spinning machine, wherein an additive supply device for applying at least one additive to the fiber tape, in particular to the fiber tape surface, is arranged in an area enclosed by the fiber tape inlet and the fiber tape outlet.

[0009] Furthermore, the invention relates to a spinning preparation machine with at least one additive feeding device for applying at least one additive to the fiber strip to be processed or produced by the spinning preparation machine.

[0010] Furthermore, the invention proposes a storage device for temporarily storing a defined quantity of fiber tape, comprising a fillable and emptied storage space for storing the defined quantity of fiber tape and at least one additive supply device for applying an additive to the fiber tape during filling and / or emptying of the storage space.

[0011] The inventive method for applying an additive to a fiber sliver comprises, as process steps, first feeding at least one fiber sliver to a fiber sliver drawing unit of a spinning preparation machine and / or another device for pre-processing the fiber sliver before further processing of the fiber sliver into a yarn within a spinning machine, followed by applying at least one additive to the surface of the fiber sliver or to the fiber sliver, in particular by means of an additive feeding device, within the fiber sliver drawing unit and / or before further processing of the fiber sliver into a yarn by means of the spinning machine.

[0012] In contrast to the prior art, the additive is added according to the present invention pre-processed in the spinning preparation stage, outside of the processing of the fiber sliver by a spinning machine. This offers the initial advantage of significantly reducing the amount of excess additive introduced, thus considerably reducing the need for time-consuming and costly cleaning of the spinning units of the spinning machine and also resulting in a better spinning outcome.

[0013] Furthermore, the inventors recognized that the number of devices processing a fiber sliver in the pre-process stage is typically significantly lower compared to the number of (air) spinning stations in a spinning machine. This means that pre-process additive feeding, particularly in the drafting units of spinning preparation machines and / or in other devices for pre-processing the fiber sliver, such as storage devices for temporarily storing a defined quantity of fiber sliver, can reduce the effort required to feed the additive. This allows for a simpler spinning machine design and thus lower manufacturing and operating costs.

[0014] For the purposes of the present invention, a spinning preparation machine is understood to be any machine that is processually located upstream in the processing chain of fibers for a spinning machine.

[0015] A spinning machine within the meaning of the invention is initially any device that spins a yarn or thread from a fiber ribbon. Preferably, the spinning machine is an air-jet spinning machine. An air-jet spinning machine is understood to be any spinning machine that uses at least one airflow to swirl fibers, in particular wound fibers, around an internal fiber core to form a thread or yarn. The yarn formation process takes place in the region of a spinneret, which is formed from one or more spinning elements. An air-jet spinning machine preferably has at least one spinning unit comprising a spinneret, each spinning unit serving to produce a yarn from a fiber ribbon fed to the spinneret. The spinneret has an inlet for the fiber ribbon, an internal swirl chamber, and one or more yarn-forming elements arranged at least partially in the swirl chamber.The spinning nozzle comprises spinning elements and an outlet for the yarn produced inside the vortex chamber. Furthermore, the spinning nozzle preferably has several air nozzles opening into the vortex chamber, which are particularly preferably connected to at least one air supply line. During operation of the air spinning machine, compressed air supplied by the air supply line flows into the vortex chamber via the air nozzles to generate a vortex airflow within the vortex chamber for air spinning the fiber sliver into yarn.

[0016] A yarn or thread within the meaning of the invention is a fiber composite produced from a fiber sliver, in which at least a portion of the fibers are wound around an inner fiber core during the spinning process. The yarn or thread can be, for example, a so-called air yarn, OE yarn, rotor yarn, or ring yarn. A yarn can also be a roving for further processing. The fiber composite, and thus the yarn, is preferably at least partially, and particularly preferably entirely, made of natural fibers or synthetic fibers, or chemical fibers, for example, polyester.

[0017] A fiber sliver is essentially the fiber material supplied to the (air) spinning process, provided as a continuous sliver or composite of fibers to be spun. All fibers can be made of the same material, or the sliver can contain chemically distinct fibers. However, the fibers in the sliver are not yet spun together. Accordingly, for the purposes of the present invention, a fiber sliver is understood to be a defined, i.e., predeterminable or predetermined, quantity of individual fibers of a defined, i.e., predeterminable or predetermined, length, which are aligned parallel to each other along their direction of extension and bundled together to form a sliver of defined thickness and density.The individual fibers combined to form a fiber tape can therefore preferably be natural fibers, synthetic fibers or a combination of natural and synthetic individual fibers.

[0018] A fiber tape drawing machine according to the invention is any device that can lengthen, thin, stretch, and / or refine a fiber tape, wherein preferably in the fiber tape drawing machine the individual fibers of the fiber tape are aligned parallel to one another, compacted as required, and / or the entanglement of the individual fibers to one another is reduced. For this purpose, the drawing machine preferably has at least two pairs of rollers, which are arranged spaced apart from one another in the transport direction of the fiber tape with an intermediate drawing area and can be driven at different rotational speeds to set a defined drawing ratio.

[0019] The fiber strip drafting unit is designed for a spinning preparation machine and is preferably a component of the spinning preparation machine. More preferably, the fiber strip drafting unit is a component of a carding machine or a drafting unit.

[0020] According to the invention, the fiber tape drawing unit has a fiber tape inlet, which can either be formed as an independent component or simply denote the area of ​​the fiber tape drawing unit where the fiber tape is fed into the fiber tape drawing unit. The fiber tape inlet is generally located in the transport direction of the fiber tape through the fiber tape drawing unit, upstream of the first pair of rollers.

[0021] Preferably, the fiber tape drawing unit has several pairs of rollers arranged one behind the other, which are particularly preferably operated at increasing rotational speeds with increasing distance from the fiber tape inlet and / or along the transport direction of the fiber tape through the drawing unit, in order to draw the fiber tape with a predetermined, and in particular variably adjustable, draft ratio. Thus, a drawing and drafting zone is created between two successive pairs of rollers within which the fiber tape is drawn. Particularly preferably, the fiber tape drawing unit has several drawing and drafting zones arranged one behind the other.

[0022] Each pair of rollers has at least two opposing stretching rollers. However, it is also conceivable that along the circumference of at least one of the stretching rollers of a pair of rollers, several further stretching rollers, each opposite the first stretching roller, can be arranged. In particular, at least two further stretching rollers can be arranged on one stretching roller, each opposite the first stretching roller and rolling along it.

[0023] To discharge the stretched fiber strip from the fiber strip drawing unit and to feed the fiber strip to a subsequent processing device, the fiber strip drawing unit has a fiber strip outlet. The fiber strip outlet can be located in the transport direction of the fiber strip in the fiber strip drawing unit behind a last pair of rollers or be formed by an outlet roller pair of the fiber strip drawing unit, in particular a so-called delivery roller pair.

[0024] According to the invention, the additive feeding device is arranged in an area enclosed or limited by the fiber tape inlet and the fiber tape outlet. In other words, the additive feeding device is arranged between the fiber tape inlet and the fiber tape outlet at at least one location, particularly in the area of ​​the fiber tape drawing unit or the storage device, wherein the location can be situated along the transport direction of the fiber tape in the processing area of ​​the fiber tape inlet, the fiber tape outlet, or in an intermediate area.

[0025] An additive feeding device can initially be any device for feeding an additive to a fiber tape, wherein the additive feeding device is preferably designed to apply at least one additive to a surface of a fiber tape. The application of the additive can take place at a single position or from a single direction with respect to the fiber tape. Furthermore, additive feeding to a fiber tape can also occur at several positions simultaneously and / or from several directions using a single additive feeding device. The additive feeding can be either contactless with the fiber tape or in contact with a surface of the fiber tape.

[0026] Furthermore, several additive feeding devices can be operated in parallel or connected together, whereby individual components can be omitted or shared between several additive feeding devices, for example an additive reservoir or collection container and / or at least sectionally the transport lines for the additive.

[0027] The additive can be either a liquid or a solid. Furthermore, emulsions, dispersions, or other mixtures of substances are also conceivable as additives, with the additive preferably being liquid or free-flowing. Preferably, the additive is an aqueous solution and / or water-soluble. The additive can be added to the fiber sliver to improve the properties of the resulting yarn, for example, with regard to its hairiness, strength, elongation, and yarn uniformity. In addition, the additive can be used to support the manufacturing process.

[0028] By way of example, possible additive combinations already known from the prior art, as detailed in EP 2 730 695 A1 and EP 2 735 644 A1, are mentioned. In particular, the additive can consist of a combination of water with an admixture of at least one other component.

[0029] Pre-processing refers to a processing step of the fiber sliver that precedes the processing steps inherent to or associated with an (air) spinning machine, such as feeding the fiber sliver, drawing the fiber sliver, spinning yarn from the fed fiber sliver, and winding the spun yarn. This pre-processing step takes place in a processing area located outside the processing area of ​​the (air) spinning machine. Pre-processing preferably includes handling of the produced fiber sliver, such as forwarding and / or processing the fiber sliver within a spinning preparation machine, transporting the fiber sliver between spinning preparation machines (e.g., from the carding machine to the drafting machine) and / or transporting it from a spinning preparation machine to the spinning machine, or intermediate storage.Storage of a defined quantity of fiber tape, for example in a can designed as a storage device.

[0030] In a preferred embodiment of the fiber tape drawing machine according to the invention, an additive feeding device for applying at least one additive to the fiber tape or to the surface of the fiber tape is arranged in the area of ​​the incoming fiber tape, in particular between the fiber tape inlet and a first drawing roller or a first pair of rollers, thereby achieving a particularly good distribution of the additive over the entire surface of the fiber tape during the subsequent drawing of the fiber tape. Additive feeding in the area of ​​the incoming fiber tape can, in particular, be carried out as an alternative or in addition to a further additive feeding device at another position in the fiber tape drawing machine or to at least one further additive feeding device.

[0031] Additionally or alternatively, an additive feeding device for applying at least one additive to the fiber tape or to the surface of the fiber tape can be arranged in the processing area of ​​the fiber tape drawing unit or in the area of ​​at least one drawing and drawing section, particularly behind a first pair of rollers and before a last pair of rollers of the fiber tape drawing unit. This ensures, on the one hand, that the additive is applied to the already partially drawn and thus more receptive fiber tape, and on the other hand, that the additive is still well distributed on the fiber tape surface as it passes through at least one subsequent pair of rollers. Particularly preferably, an additive feeding device is arranged in each of several drawing and drawing sections, and most preferably, at least one additive feeding device is arranged in each drawing and drawing section.

[0032] Furthermore, or alternatively, an additive application device for applying at least one additive to the fiber sliver or its surface can be arranged in the processing area of ​​the fiber sliver drawing unit or in the area of ​​the fiber sliver exiting the fiber sliver drawing unit, particularly behind a last pair of rollers of the fiber sliver drawing unit. This ensures that the additive remains on the surface of the fiber sliver and is therefore located, in particular, on the outer wrapping fibers necessary for spinning. This allows for particularly effective support of the subsequent spinning process with a very small amount of additive. Moreover, such application can also significantly influence the surface properties of the spun yarn.The additive supply device is preferably arranged behind a last pair of rollers before the fiber strip exit or in the processing area of ​​the fiber strip exit of the fiber strip drawing unit.

[0033] Although the additive can be applied to the fiber tape in any way, it is particularly preferred that the additive supply device includes at least one means for spraying the additive onto the fiber tape, thus enabling the additive to be applied to the surface of the fiber tape in a simple, contactless manner and with a particularly uniform distribution. A particularly advantageous embodiment of the additive supply device preferably includes at least one nozzle, preferably several nozzles, for spraying the additive, as well as a transport line connected to each nozzle. The at least one nozzle is particularly preferably arranged opposite a surface of the fiber tape or with an outlet opening directed towards a surface of the fiber tape, thus enabling simple direct spraying of the additive.

[0034] Furthermore, it is preferred that the additive is supplied to the at least one nozzle in the additive supply device by means of compressed air, wherein the additive supply device particularly preferably comprises at least one pressure vessel, in particular a compressed air vessel for several nozzles, in which the additive is held for conveyance into the area of ​​the line and in which a gaseous pressure medium is also contained.

[0035] An advantageous embodiment of the fiber tape drawing device according to the invention provides that the dispensed quantity, in particular the dispensed volumetric and / or mass flow rate, of the additive supplied via the nozzle's transport line is adjustable by means of a metering device. Preferably, each nozzle is assigned a separate metering device, or the dispensed quantity of additive to each nozzle is individually adjustable. This advantageously allows for precise control of the metering to prevent the application of more or less than the predetermined target quantity of additive to individual fiber tape sections. The metering device preferably comprises a pump and / or a valve.

[0036] It is advantageous if the flow rate or the volume and / or mass flow rate of the additive is adjustable, for example, to adapt the specified amount of additive to the respective fiber sliver and / or the desired properties of the yarn to be spun from it. Preferably, the amount of additive dispensed, particularly from each nozzle, is adjustable by means of the metering device to between 0.001 ml / min and 7.0 ml / min, more preferably between 0.01 ml / min and 5.0 ml / min, and most preferably between 0.05 and 3.0 ml / min, and / or the mass flow rate of the supplied additive is preferably between 0.001 g / min and 7.0 g / min, more preferably between 0.01 g / min and 5.0 g / min, and most preferably between 0.05 g / min and 3.0 g / min.

[0037] Furthermore, a design of the fiber tape drawing unit is preferred which has an additive feed device with at least one switching device for changing between different additives, making it particularly easy and quick to change the currently used additive.

[0038] A preferred embodiment of the spinning preparation machine according to the invention provides that the additive feeding device is arranged in the area of ​​a drawing unit, in particular a fiber strip drawing unit according to the invention.

[0039] Finally, in an alternative or preferred embodiment of the method for applying an additive to a fiber sliver, the additive is applied in the area of ​​a device for pre-processing the fiber sliver after its production. This allows for particularly early application of the additive and thus particularly good distribution on the surface of the fiber sliver. Generally, the additive application can take place at any point during pre-processing of the fiber sliver before further processing into yarn using a spinning machine, and especially before transporting the fiber sliver to a spinning station of a spinning machine. More preferably, it can also take place during the intermediate storage of a defined quantity of fiber sliver. Furthermore, additive application at multiple points is conceivable.The same additive can be applied multiple times, or several different additives can be applied.

[0040] An additive feeding device according to one of the preferred embodiments can preferably be used for the preferred method for applying an additive to a fiber strip and / or be part of the spinning preparation machine and / or the storage device or be assigned to these respectively.

[0041] An embodiment of a fiber tape drawing device according to the invention for drawing a fiber tape is explained in more detail below with reference to the drawing. The figure shows: Fig. 1 a schematic view of a fiber strip drawing machine with several pairs of rollers and several additive feeding devices.

[0042] By means of a schematic in the Figure 1In the illustrated fiber strip drawing unit 1, a fiber strip 2 is drawn so that it can subsequently be fed to a spinning preparation machine (not shown), for example a carding machine or a drawing machine, and subsequently to a spinning machine such as a rotor or air spinning machine for spinning yarn from the fiber strip 2. Particularly in the case of a drawing machine, more than one fiber strip 2 can also be fed according to an embodiment not shown.

[0043] The fiber strip drawing unit 1 has three pairs of rollers 5a, 5b, 5c arranged one behind the other along the course of the fiber strip 2 inside the fiber strip drawing unit 1, wherein the space between two successive pairs of rollers forms a drawing and warping field 4.

[0044] To positively influence the properties of the fiber strip 2 for the spinning process following the drawing, several additive feed devices 7a, 7b, 7c are arranged in the area of ​​the fiber strip drawing unit 1. Each of these devices has an additive nozzle connected to an additive feed line, which is directed onto a surface of the fiber strip 2. Although each of the additive feed devices 7a, 7b, 7c could also have its own additive container, all additive feed lines leading to an additive nozzle are each connected to an additive container, which is preferably pressurized, so that the additive is forced through the additive feed lines towards the additive nozzles.

[0045] The first additive feed device 7a is arranged between a fiber strip inlet 3 of the fiber strip drawing unit 1 and a first pair of rollers 5a, while a further additive feed device 7b is arranged in a drawing and warping area 4 between the first pair of rollers 5a and a second pair of rollers 5b. Finally, a third additive feed device 7c is arranged behind the last pair of rollers 5c and in front of a fiber strip outlet 6 of the fiber strip drawing unit 1.

[0046] Preferably, a metering device is arranged in front of the nozzle or on the additive line of each nozzle in order to be able to adjust the amount of additive specified at the nozzle of the respective additive supply device 7a, 7b, 7c.

[0047] The additive is applied to the fiber tape 2 after the fiber tape 2 has been fed to the fiber tape drawing unit 1 within the fiber tape drawing unit 1 via the appropriately arranged additive feeding devices 7a, 7b, 7c.

[0048] In one embodiment (not shown), an additive feeding device is arranged to apply an additive to the fiber tape 2 during the filling and emptying of a can. For this purpose, the additive feeding device is arranged such that the fiber tape 2 can be supplied with the additive as it enters the can chamber. In a preferred embodiment, the inlet for filling the can is arranged separately from an outlet for removing the fiber tape 2 from the can, or in a further preferred embodiment, it is identical to the outlet. The preferred arrangement of at least one additive feeding device in the area of ​​both the inlet and the outlet enables the additive to be applied to the fiber tape 2 as needed during a filling and / or emptying process. The additive feeding device can be configured accordingly, as described above. Reference symbol list

[0049] 1 Fiber strip drawing unit 2 Fiber strip 3 Fiber strip inlet 4 Drawing and warping area 5a-c Roller pairs 6 Fiber strip outlet 7a-c Additive feed device

Claims

1. A fibre band drafting system (1) for a spinning preparation machine, in particular for a carding machine or drawing frame, having - a fibre band entrance (3) for receiving at least one fibre band (2), which is formed from a defined quantity of individual fibres of defined length, the quantity of individual fibres being combined along their direction of extension, aligned parallel to one another, to form a sliver of defined thickness and density, - at least one drafting zone (4) bounded in the transport direction of the fibre band (2) by a roller pair (5a, 5b, 5c) for drafting the received fibre band (2), and - a fibre band exit (6) for discharging the drafted fibre band (2) in the direction of a subsequent fibre band processing device, characterized in that - an additive feeding device (7a, 7b, 7c) for applying an additive to the fibre band (2) is arranged in an area enclosed by the fibre band entrance (3) and the fibre band exit (6).

2. The fibre band drafting system (1) according to claim 1, characterized in that an additive feeding device (7a) for applying an additive to the fibre band (2) is arranged in the region of the incoming fibre band (2), in particular between the fibre band entrance (3) and a first roller pair (5a).

3. The fibre band drafting system (1) according to one of claims 1 or 2, characterized in that an additive feeding device (7b) for applying an additive to the fibre band (2) is arranged in the region of the at least one drafting zone (4), in particular downstream of a first roller pair (5a) and upstream of a last roller pair (5c) of the fibre band drafting system (1).

4. The fibre band drafting system (1) according to at least one of the preceding claims, characterized in that an additive feeding device (7c) for applying an additive to the fibre band (2) is arranged in the region of the fibre band exit (6), in particular downstream of a last roller pair (5c) of the fibre band drafting system (1).

5. The fibre band drafting system (1) according to at least one of the preceding claims, characterized in that the additive feeding device (7a, 7b, 7c) has at least one means for spraying the additive onto the fibre band (2).

6. The fibre band drafting system (1) according to claim 5, characterized in that the additive feeding device (7a, 7b, 7c) comprises at least one nozzle for spraying the additive as well as a transport line connected to the nozzle, in which case the nozzle, of which there is at least one, is arranged with an outlet opening directed towards a surface of the fibre band (2).

7. The fibre band drafting system (1) according to claim 6, characterized in that the additive in the additive feeding device (7a, 7b, 7c) is supplied to the nozzle, of which there is at least one, by means of compressed air.

8. The fibre band drafting system (1) according to claim 6 or 7, characterized in that the delivered amount of the additive supplied to the nozzle via the transport line is adjustable by means of a dosing device, with preferably the delivered amount of additive of each nozzle being individually adjustable.

9. The fibre band drafting system (1) according to claim 8, characterized in that the delivered additive quantity is adjustable to between 0.01 ml / min and 5.0 ml / min by means of the dosing device.

10. The fibre band drafting system (1) according to at least one of the preceding claims, characterized in that the additive feeding device (7a, 7b, 7c) comprises a switching device for switching between different additives.

11. A spinning preparation machine, with - at least one additive feeding device (7a, 7b, 7c) for applying an additive to the fibre band (2) to be processed or produced by the spinning preparation machine, which fibre band (2) is formed from a defined quantity of individual fibres of defined length, the quantity of individual fibres being combined along their direction of extension, aligned parallel to one another, to form a sliver of defined thickness and density.

12. The spinning preparation machine according to claim 11, characterized in that the additive feeding device (7) is arranged in the region of a fibre band drafting system (1), in particular a fibre band drafting system (1) according to one of claims 1 - 10.

13. A storage device for temporarily storing a defined quantity of fibre band (2) with - a storage space, which can be filled and emptied, for storing the defined quantity of fibre band (2), which is formed from a defined quantity of individual fibres of defined length, the quantity of individual fibres being combined along their direction of extension, aligned parallel to one another, to form a sliver of defined thickness and density, and - at least one additive feeding device (7a, 7b, 7c) for applying an additive to the fibre band (2) during filling and / or emptying of the storage space.

14. A method for applying an additive to a fibre band (2), with the steps of: - feeding at least one fibre band (2), which is formed from a defined quantity of individual fibres of defined length, the quantity of individual fibres being combined along their direction of extension, aligned parallel to one another, to form a sliver of defined thickness and density, to a fibre band drafting system (1) of a spinning preparation machine and / or another device for preprocessing the fibre band (2) before further processing of the fibre band (2) within a spinning machine to form a thread, - applying an additive to the fibre band (2) within the fibre band drafting system (1) and / or before further processing of the fibre band (2) into a thread by means of the spinning machine.

15. The method for applying an additive to a fibre band (2) according to claim 14, characterized in that the additive is applied in the region of a carding machine, drawing frame or storage device, which is located upstream of the spinning machine in the process, for the intermediate storage of a defined quantity of fibre band (2), in particular in the region of a can during filling and / or emptying.

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