Method for making an electrical contact

Abstract

Method for producing an electrical contact between several first fibers (2) and several second fibers (4) by means of a connecting device having several electrically conductive elements (6), the method comprising the following steps: A. Positioning a first fiber (2) on an electrically conductive element (6), B. Positioning a second fiber (4) on the electrically conductive element (6) so that an electrical contact is established between the first fiber (2) and the second fiber (4) and C. Fixing the first fiber (2) and the second fiber (4) to the connecting device.

Description

[0001] The invention relates to a method for producing an electrical contact between several first fibers and several second fibers.

[0002] Today, a wide variety of garments are designed and manufactured with integrated electrical devices. This can be done for aesthetic or fashion reasons, for example, by incorporating lighting elements such as LEDs. These are attached to or integrated into the garments and powered by a electrical supply. Lighting elements, in particular, but also other electrical devices, can be used by emergency personnel to make firefighters or police officers easily identifiable. Speakers or microphones can also be effectively integrated into clothing to establish and maintain radio communication between emergency responders and headquarters or a control center, eliminating the need for the responder to manually operate a radio.Electrical devices can, of course, be equipped with position sensors or GPS sensors that determine their position from received GPS signals and transmit this information to a control center, for example. This makes it easy to maintain an overview of the positions of individual emergency personnel, especially during large and complex operations.

[0003] The use of electrically powered heating elements in clothing, such as jackets, to ensure sufficient warmth for the wearer is well-known. This is particularly advantageous for hunters who may need to remain still for extended periods in potentially cold environments.

[0004] If a garment is to be equipped with electrical components and a power supply, the conventional approach today is to manufacture the garment first and then attach the necessary wiring. A corresponding design is known, for example, from EP 2 133 809 B1. It describes a garment consisting of at least two parts, for example a jacket with a hood, where the electrical connection between the two parts is achieved, for example, via snap fasteners.

[0005] Methods are known from WO 2017 / 102 615 A1 and DE 11 2007 000 189 T5 in which a contact area in the form of a flat expansion or a “pad” is arranged at one end of the electrical conductors to be joined, which can then be more easily brought directly into contact and connected together.

[0006] However, GB 2 554 646 A, DE 10 2016 224 568 A1 and US 2018 / 0 090 861 A1 suggest arranging the conductors to be joined directly next to each other and make various suggestions for finding and fixing the correct orientation to each other.

[0007] US Patent 2012 / 0 030 935 A1 describes the joining of electrically conductive fibers in textiles. The fibers are surrounded by insulation, which is melted to join them. The desired bond is formed upon subsequent hardening. A similar process is known from US Patent 2004 / 0 244 193 A1.

[0008] From US patent 2010 / 0101858A1, a method is known in which a plurality of electrically conductive fibers in a textile are connected to a single electrically conductive element in order to connect the fibers to a power supply.

[0009] US 2008 / 0 066 306 A1 deals with a type of textile rivet that is pierced through elements to be joined and then reshaped by a suitable tool.

[0010] Retrofitting garments with electrical wiring, electrical components, and a power supply is complex, cumbersome, and therefore expensive. The invention therefore aims to further improve a method and a device in such a way that these disadvantages are avoided or at least reduced.

[0011] The invention solves the stated problem by a method for producing an electrical contact between several first fibers and several second fibers by means of a connecting device having several electrically conductive elements, wherein the method comprises the following steps: a) positioning a first fiber on an electrically conductive element, b) positioning a second fiber on the electrically conductive element so that an electrical contact is made between the first fiber and the second fiber, and c) fixing the first fiber and the second fiber to the connecting device.

[0012] The inventive method thus makes it possible to establish an electrical contact between a first fiber and a second fiber, which can, for example, be threads in a textile. Advantageously, the first and second fibers are electrically conductive. This can be achieved, for example, by using thin metallic wires or textiles or carbon fibers coated with an electrically conductive material, such as carbon black or metal. To establish an electrical contact between the at least one first fiber, which is itself electrically conductive, and the at least one second fiber, which is also electrically conductive, the two fibers are positioned in a connecting device.In this process, they come into contact with an electrically conductive element of the connecting device, so that electrical contact is established between the first and second fibers via this conductive element. In this state, the first and second fibers are then fixed to the connecting device, so that the electrical contact is maintained even when the connected fibers are subjected to mechanical stress, such as that which can occur when wearing a garment.

[0013] The electrically conductive element of the connecting device preferably comprises a carrier material designed as a double-sided adhesive tape with integrated electrically conductive particles, preferably made of metal. Such an adhesive tape is available, for example, under the name "Z-Tape." Due to the electrically conductive particles, an electric current can only flow in the z-direction, i.e., from one top side of the adhesive tape to the opposite bottom side of the tape, or vice versa. Current flow parallel to the top or bottom side is impossible because there are not enough particles present to exceed the percolation threshold. This type of adhesive tape has the advantage that it does not need to be precisely aligned with the first and / or second fiber.Manufacturing tolerances or inaccuracies are compensated for because the adhesive tape allows electrical contact in only one direction between its top and bottom surfaces.

[0014] Preferably, the connecting device has an electrically conductive layer on the side facing away from the first fiber and the second fiber, for example an electrically conductive textile, a metal mesh or the like.

[0015] Preferably, the connecting device has a leveling layer on the side of the electrically conductive layer facing away from the adhesive tape, for example in the form of a viscous plastic, adhesive, or other leveling material. This allows any unevenness to be compensated for. Furthermore, it provides mechanical stabilization and electrical insulation of the underlying electrical contact areas.

[0016] A cover layer or coating, for example made of a thermoplastic material, is preferably used to enhance mechanical stability and electrical insulation. This cover layer or coating is advantageous regardless of the overall design of the connection device.

[0017] In a preferred embodiment, the first fiber and the second fiber are fixed to the joining device by sewing, gluing or welding.

[0018] If the first fiber and / or the second fiber are sewn to the joining device, i.e., fixed to it by sewing, this is preferably done using an electrically conductive yarn. In a first embodiment of this design, the joining device has a support layer on which the at least one electrically conductive element is arranged. This at least one electrically conductive element serves as a bridge between the first fiber and the second fiber. In another embodiment, in which the first fiber and the second fiber are fixed to the joining device by sewing, the joining device consists entirely or at least substantially of the electrically conductive yarn. The electrically conductive yarn then naturally also forms the electrically conductive element of the joining device.The first and second fibers are arranged such that, when sewing with the electrically conductive yarn, an electrical contact is established between the electrically conductive yarn and the first fiber, and an electrical contact is established between the electrically conductive yarn and the second fiber. Particularly preferably, a direct electrical contact also occurs between the first and second fibers.

[0019] Of course, an electrically non-conductive yarn can also be used for sewing if it is ensured that an electrical contact is established between the electrically conductive element of the joining device and the first fiber, and between the electrically conductive element of the joining device and the second fiber.

[0020] In a particularly preferred embodiment, the joining device has a fixing layer made of a fixing material, which is preferably a thermoplastic. This material is melted or at least softened sufficiently to bond with the ends of the first and second fibers by heating, for example, by ironing. After the material cools, it hardens, resulting in a permanent bond and fixation of the fibers to the fixing layer and the rest of the joining device. Although the fixing layer is hardened after cooling, this does not preclude it from being flexible or even elastic. On the contrary, flexible and especially elastic fixing materials have the advantage of being better able to withstand the mechanical stresses that can occur, for example, when wearing clothing.Furthermore, their flexibility and especially elasticity increase the wearing comfort of garments that have fibers connected by this type of connecting device.

[0021] The use of this type of welding, in which a fixing material is melted or softened to bond with the fiber ends, has the significant advantage of being a clean, easy-to-handle, yet fast and therefore cost-effective way to fix the first and second fibers to the binding device. The fixing layer made of the fixing material is easy to handle even when unheated, as it is neither sticky nor greasy. The amount of fixing material required can be easily measured, for example, by forming the fixing layer as a strip of the material. This strip can be attached to another component of the bonding device, such as sewn on, so that it cannot be lost.

[0022] Heating, especially with an iron, does not take a long time and can therefore be used on an industrial scale.

[0023] If this is still not desired, the fastening can of course also be achieved in other ways, particularly by sewing. In this case, the ends of at least one first fiber and at least one second fiber are sewn to the joining device in such a way that permanent contact is made between the respective fibers and the electrically conductive element of the joining device. This has the advantage that no separate machines or devices are required, since sewing machines are already used to join various textile elements.

[0024] Preferably, the first and second fibers are textile fibers or threads, carbon fibers, or metallic wires. Other electrically conductive elements are also possible.

[0025] In a preferred embodiment of the method, the first fibers and / or the second fibers are each part of a textile, in particular a nonwoven, a knitted fabric, or a woven fabric. This includes, for example, woven elements made of carbon fibers used to manufacture carbon fiber composites. Conventionally, such textiles are joined together by sewing. Only in the production of glass fiber and carbon fiber composites are the individual textile elements bonded together using synthetic resins. Without establishing an electrical connection between the first fiber and the second fiber, which are advantageously electrically conductive, they must be joined by bringing each fiber into contact with the electrically conductive element of the joining device and then fixing it in place.For this purpose, the first fiber and / or the second fiber, at least a portion of it, can be pulled out of the respective textile in order to connect them together.

[0026] In a preferred embodiment, the connecting device has a covering layer, for example made of a textile, in particular a woven fabric, which is folded and / or turned over before the fibers are fixed in such a way that it completely surrounds the electrically conductive element. This covers the electrically conductive components and, in particular, the electrical contacts between them. This ensures that, on the one hand, the electrical contacts are afforded a certain degree of protection even under mechanical stress and damage, and on the other hand, that the electrical contacts and the electrically conductive elements are insulated from the environment, in particular from other components of clothing. The material of the surrounding layer is advantageously electrically insulating.

[0027] According to the invention, several, preferably two, three, four or five, first fibers are connected to several, preferably two, three, four or five, second fibers. Preferably, the first fibers and / or the second fibers are connected to each other by spacers.

[0028] This is particularly advantageous when the various electrically conductive fibers are used not only for transmitting electrical current but also, for example, as data lines, such as bus lines. The use of spacers or other connecting devices that join the respective first or second fibers significantly simplifies the process. Naturally, in this case, the connecting device advantageously has several electrically conductive elements, the number of which corresponds to the number of connections to be made between the respective fibers. Thus, if five first fibers are to be connected to five second fibers, the connecting device advantageously has at least five electrically conductive elements.The spacers not only keep the respective first or second fibers at an optimal distance from each other for their arrangement in the connection device, but also predefine the sequence or sorting of the individual fibers to be used as power or data cables, preventing accidental swapping that could lead to faulty wiring or connection of the individual fibers and thus malfunctions in electrical devices.

[0029] The invention further solves the stated problem by a method for connecting a first textile element, which has several first fibers, with a second textile element, which has several second fibers, by means of a connecting device which has at least one electrically conductive element, wherein the method comprises the following steps: A) connecting the first fibers with the second fibers according to a method described herein and B) connecting the first textile element with the second textile element, in particular by sewing.

[0030] These methods can be used in the production of garments made from several textile elements that are cut separately. Traditionally, these textile elements are sewn together, without any particular emphasis on connecting individual fibers. However, since garments intended to incorporate wiring or cabling require such connections between individual fibers—specifically, between first and second fibers—these connections are made separately using the method described here.

[0031] Advantageously, the textile elements are first joined together before the fibers are joined. This ensures sufficient stability of the connection between the textile elements before the individual fibers are joined together. Of course, it is also possible to first join the first fibers to the second fibers and only then join the textile elements together.

[0032] Preferably, the connecting device is attached to the first textile element, and the first fiber is connected to the electrically conductive element. This eliminates the need to supply the connecting device as a separate element, which increases the risk of loss. If the connecting device is already attached to a textile element, it not only cannot be lost, but the positioning of at least one first fiber can also have already taken place. For this purpose, it is advantageous if the fiber is at least temporarily positioned within a connecting device, so that the fiber is in contact with the electrically conductive element of the connecting device. The actual fixing then occurs at a later point when the second fiber is also in contact with the electrically conductive element.

[0033] The electrical contact between the first fiber and the electrically conductive element of the connecting device and / or the electrical contact between the second fiber and the electrically conductive element of the connecting device can also be established, for example, by placing the connecting device onto the already joined textile elements, which are advantageously sewn together. This is advantageously done in such a way that the electrically conductive element comes into contact with the respective desired fibers, thus establishing the electrical connection. The connecting device then advantageously has a fixing layer made of a fixing material, which is advantageously bonded to the connected textile element by ironing.

[0034] The connecting device, with its electrically conductive element, preferably serves as a bridge to span the seam where the two textile elements are joined. In this case, it is advantageous to join the textile elements first. Such a bridge compensates for inaccuracies in the positioning of the textile elements relative to each other, which would otherwise result in inaccuracies in the positioning of the first and second fibers relative to each other. Furthermore, it can bridge defects or damage to the fibers being joined, such as corrosion at the fiber ends.

[0035] The invention further solves the stated problem by providing a connecting device for a method described herein, which includes at least one electrically conductive element. This element is advantageously designed as a metal strip or an electrically conductive textile, for example, a coated woven fabric or nonwoven. Preferably, the connecting device has a covering layer, for example, in the form of a textile layer, which preferably has larger dimensions than the electrically conductive element. After the first fiber and the second fiber have been positioned on the electrically conductive element, this covering layer can be folded, folded, or rolled up to enclose the electrically conductive elements and, in particular, the electrical contact between these elements. In this way, the electrical contact is protected from damage and contamination, and electrical insulation from the environment is also achieved.

[0036] With the aid of the accompanying figures, an embodiment of the present invention will be explained in more detail below. It shows Fig. 1 - a partial exploded view of fibers joined together according to a method according to an embodiment of the present invention, as well as a cross-sectional view through such a connection, Fig. 2 and Fig. 3 - Schematic representations of further embodiments of the present invention, Fig. 4 and Fig. 5 - two sectional views through connections according to further embodiments of the present invention, Fig. 6.1 to 6.3 - various process steps for producing such a compound, Fig. 7 - the schematic representation of a connection according to a further embodiment of the present invention, Fig. 8 - a schematic exploded view of a connecting device and Fig. 9 & 10 - schematic representations of further examples of implementation.

[0037] Fig. Figure 1 schematically shows three first fibers 2 and three second fibers 4. These are connected to each other by a connecting device shown in partial explosion view. This device has three electrically conductive elements 6 which, in the illustrated embodiment, are arranged on a carrier layer 8. The carrier layer 8 can, for example, be coated with an adhesive so that the electrically conductive elements 6 adhere to the carrier layer 8. Alternatively, they can also be sewn on or attached in some other way. In a particularly preferred embodiment, the carrier layer 8 is already a fixing layer made of a fixing material that can be melted, for example, by the application of heat. The in Fig. The connection device shown in 1 has two coating layers 10, which on the one hand serve as a layer against contamination and damage and on the other hand provide electrical insulation from the environment.

[0038] After the first fibers 2 and the second fibers 4 as in Fig. The layers 10 are arranged as shown in Figure 1, with temporary fastening possible, for example, via a simple seam, adhesive, or other positioning aid. The sheathing layers 10 are then arranged and the entire layered structure is heated. This can be done, for example, using an iron or a heat gun. If the carrier layer 8 is a fixing layer, the fixing material melts and creates a permanent bond between the first fibers 2 and the second fibers 4, as well as the electrically conductive elements 6 in the lower right corner of the Fig. Figure 1 shows the layer structure in a cross-sectional view. The encapsulation layers 10, which cover the entire layer structure on both sides, are visible. The material of the carrier layer 8 has wrapped around the electrically conductive elements 6, as well as the first fibers 2 and the second fibers 4, ensuring a permanent fixation of the individual components to one another.

[0039] Fig. Figure 2 shows an embodiment in which a first textile element 12 is already connected to a second textile element 14. In the illustrated embodiment, the edges 16 of the two textile elements 12 and 14, at which they are connected, are folded downwards. The first textile element 12 has three first fibers 2, and the second textile element 14 has three second fibers 4. These are arranged such that they converge in the sewn state shown. However, electrical contact between the first fibers 2 and the second fibers 4 cannot be guaranteed, so a connecting device, shown above, is necessary. This device also has the previously known support layer 8, advantageously made of a fixing material, on the underside of which the three electrically conductive elements 6 are located.The carrier layer 8 with the electrically conductive elements 6 is placed onto the sewn textile elements 12, 14 according to arrows 18, whereby the carrier layer 8 and the electrically conductive elements 6 are positioned so that the electrically conductive elements 6 come into contact with both the first fibers 2 and the second fibers 4. The entire assembly is covered by a sheathing layer 10. Here, too, after the fibers 2, 4 have been placed and positioned relative to the electrically conductive elements 6, heat is applied, causing the material of the carrier layer 8 to melt and creating a permanent bond.

[0040] Fig. Figure 3 shows a similar embodiment, in which again a first textile element 12 is sewn to a second textile element 14. Here too, the first textile element 12 has a first fiber 2 and the second textile element 14 has a second fiber 4. Unlike in Figure 3, the first textile element 12 has a first fiber 2 and the second textile element 14 has a second fiber 4. Fig. In the embodiment shown in Figure 2, the edges 16 are now folded upwards. Here too, electrical contact between the first fiber 2 and the second fiber 4 cannot be ensured by sewing alone. Therefore, an electrically conductive element 6 is arranged so that it makes contact with the first fiber 2 of the first textile element 12 on one side of the folded edges 16 and with the second fiber 4 of the second textile element 14 on the other side of the folded edges 16. The electrically conductive element 6 is surrounded by a fixing material that melts when heat is applied. The layer structure is again covered by the outer layer 10 made of electrically insulating material. Heat is now applied as indicated by arrows 18, which melts the materials of the carrier layer 8 and the fixing layer, thus creating a connection. Fig. 4 and Fig. Figure 5 shows cross-sectional views through further connections between the individual fibers. A first fiber 2, a second fiber 4, and electrically conductive elements 6 arranged between them are visible. While in Fig. 4 only one electrically conductive element 6 is provided for connecting the first fiber 2 with the second fiber 4, is in Fig. 5. An electrically conductive element 6 is shown both above and below the depicted fibers, so that two electrically conductive elements 6 are present for connecting a first fiber 2 to a second fiber 4. The contacts and the electrically conductive elements 6 are again covered by a material of the carrier layer 8, which melts under the influence of heat and, after cooling and hardening, ensures the permanent connection. The special feature of the in Fig. 4 and Fig. In the 5 illustrated embodiments, the covering layer 10 consists of a shrink tube which, under the application of heat that is also necessary for melting the carrier layer 8, shrinks, so that a permanent and secure connection between the fibers 2, 4 and the electrically conductive elements 6 is ensured.

[0041] Fig. Figure 6 shows process steps in the production of such a compound. In the left-hand illustration of the Fig. Figure 6 shows the outer layer 10, onto which the electrically conductive element 6, in the form of an electrically conductive nonwoven fabric, is applied by a seam 20. The electrically conductive element 6 has two wings 22, which are formed from the left-hand illustration. Fig. The elements shown in Figure 6 are folded downwards, thus ensuring contact between the respective fibers, which are not yet shown in this illustration, and the electrically conductive element 6. This is shown in the middle illustration of the Fig. Figure 6 shows the two wings 22 of the electrically conductive element 6 folded downwards. The first fibers 2 and the second fibers 4 are already positioned on the wings 22. The two wings 22 form separate electrically conductive elements 6 that are insulated from each other. Otherwise, in the illustrated embodiment, a short circuit would occur between the different conductors. The first fibers 2 and the second fibers 4 are each part of a first textile element 12 and a second textile element 14, respectively. They extend beyond the edge of these textile elements, thus enabling particularly simple electrical contact with the wings 22 of the electrically conductive elements 6. The individual side surfaces of the covering layer 10 can now be folded over and folded down, covering the electrical elements and the electrical contact between them. This is shown in the right-hand illustration of Figure 6. Fig. Figure 6 shows the complete encapsulation of the electrically conductive elements 6 as well as the ends of the fibers 2, 4.

[0042] Fig. Figure 7 shows the connection of two textile elements 12, 14 with an enclosed angle. This creates a corner through which the first fibers 2 are to be connected to the second fibers 4. The fibers 2, 4 are brought into electrical contact with the electrically conductive elements 6 and can be connected by a Fig. 7 layers of the covering not shown will be covered.

[0043] Fig. Figure 8 shows a schematic exploded view of a section through connected textile elements. The first textile element 12 and the second textile element 14 each have electrically conductive fibers (not shown). The textile elements 12 and 14 are connected by a double-sided adhesive tape 24 containing electrically conductive particles 26 that come into contact with the first and second fibers and induce an electric current. Fig. 8 from top to bottom and vice versa. A conductive fabric 28 is arranged above it, which allows an electric current to flow into Fig. 8 from left to right and vice versa allowed.

[0044] The conductive fabric 28 is covered by a leveling layer 30, which is designed as a viscous plastic and, in addition to providing mechanical stabilization and electrical insulation, allows it to compensate for unevenness caused by the underlying layers and, for example, a seam between the two textile elements 12, 14. This is covered by the outer layer 10.

[0045] Fig. Figure 9 schematically shows the in Fig. Figure 8 shows a schematic 3D view of the structure. The first textile element 12 and the second textile element 14 are connected to each other via a seam 20. In the illustrated embodiment, the two edges 16 of the respective textile elements 12 and 14 are folded upwards. Two first fibers 2 run through the first textile element 12, while two second fibers 4 run through the second textile element 14. These are to be electrically connected to each other by the connecting device 32.

[0046] The double-sided adhesive tape 24 is applied to the seam 20, the edges 16, and the surrounding area of ​​the first textile element 12 and the second textile element 14. The electrically conductive particles 26 allow current collection and electrical contact between the first fibers 2 and the second fibers 4. In the illustrated embodiment, the electrically conductive fabric 28 is formed in the form of two strips that serve to bridge the seam 20. They are applied according to the arrows 18, thus enabling electrical contact between the first fibers 2 and the second fibers 4. This layer structure is covered by the leveling layer 30 and an overlying sheathing layer 10 (not shown).

[0047] Fig. Figure 10 shows a configuration that can be used separately or as part of another configuration, for example the one in Fig.The embodiment shown in Figure 9 can be used. A first textile element 12 is shown, containing two first fibers 2. These are to be connected to second fibers 4 of a second textile element 14 (not shown), which are only schematically indicated. An LED 34 is arranged between the first fibers 2 and is connected to them via two contact points 36. The connection between the first fibers 2 and the second fibers 4 is created by an electrically conductive yarn 38, which sews the two textile elements 12 and 14 together. No further elements or components are necessary in the illustrated embodiment. The electrically conductive yarn 38 thus forms the connection device and, in particular, its electrically conductive element 6. Reference symbol list 2 first fiber 4 second fiber 6 electrically conductive element 8 Support position 10. Envelope layer 12 first textile element 14 second textile element 16 Rand 18 Arrow 20 seams 22 wings 24 double-sided adhesive tapes 26 electrically conductive particles 28 conductive tissue 30 leveling layer 32 Connecting device 34 LED 36 Contact point 38 electrically conductive yarn

Claims

[1] Method for producing an electrical contact between several first fibers (2) and several second fibers (4) by means of a connecting device comprising several electrically conductive elements (6), the method comprising the following steps: A. Positioning a first fiber (2) on an electrically conductive element (6), B. Positioning a second fiber (4) on the electrically conductive element (6) so that an electrical contact is established between the first fiber (2) and the second fiber (4) and C. Fixing the first fiber (2) and the second fiber (4) to the connecting device. [2] Method according to claim 1, characterized bythat the fixing is done by sewing, gluing or welding, wherein the joining device preferably has a fixing layer made of a fixing material, in particular a thermoplastic, which is melted or at least softened by heating, in particular ironing, and hardens after cooling. [3] Method according to claim 1 or 2, characterized by , that the first fibers (2) and the second fibers (4) are textile fibers or threads, carbon fibers or metallic wires. [4] Method according to any of the preceding claims, characterized by , that the first fibers (2) and / or the second fibers (4) are each part of a textile, in particular a nonwoven, a knitted or a woven fabric. [5] Method according to any of the foregoing claims, characterized by, that the connecting device has a covering layer (10) which is preferably folded and / or folded over in such a way that it completely surrounds the electrically conductive element (6), preferably before fixing. [6] Method according to any of the foregoing claims, characterized by that two, three, four or five first fibers (2) are connected to two, three, four or five second fibers (4), preferably the first fibers (2) and / or the second fibers (4) are connected to each other by spacers. [7] Method for joining a first textile element (12) having several first fibers (2) to a second textile element (14) having several second fibers (4) by means of a joining device having at least one electrically conductive element (6), the method comprising the following steps: A. Joining the first fibers (2) to the second fibers (4) according to a method according to one of the preceding claims, B. Connecting the first textile element (12) to the second textile element (14), in particular by sewing. [8] Method according to claim 7, characterized by , that first the textile elements (12,14) are joined together before the fibers (2,4) are joined. [9] Method according to claim 7 or 8, characterized by , that the connecting device is attached to the first textile element (12) and that the at least one first fiber (2) is connected to the electrically conductive element (6). [10] Connecting device for a method according to one of the preceding claims comprising several electrically conductive elements (6). [11] Connecting device according to claim 10, characterized by, that the electrically conductive element (6) is a metal strip or an electrically conductive textile, in particular a coated fabric or nonwoven.

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