EP2106477B1 - Cloth tape for a machine for the production of sheet material, in particular paper or cardboard - Google Patents

Description

The present invention relates to a fabric tape for a machine for producing web material, in particular paper or cardboard. Such a fabric tape can be used, for example, in a forming section as a forming fabric.

In the production of sheet material, such as e.g. Paper, there is a general requirement that at the web material contact side, ie the side with which the web material to be produced is in direct contact, a very fine structuring should be present to avoid marking effects. On the running side, ie the side which is in contact with the various rollers deflecting and advancing the fabric belt, the largest possible abrasion or wear volume should be present or a very robust construction should be provided in order to minimize the wear.

From the EP 0 432 413 A1 is a composite fabric for machine wires known in which one above the other two fabric layers are provided with two layers each directly superimposed transverse threads. The number of transverse threads of the paper side layer corresponds to the number of transverse threads of the machine side or running side layer. In the longitudinal direction of the fabric extending threads are integrated into the two layers of fabric and change at points of intersection between the two layers of fabric to make a structural connection between them.

The WO 2006/020414 A1 discloses a fabric for a paper machine with two superimposed layers of fabric with warp threads and weft threads. The number of weft threads in the paper side fabric layer is twice as large as the Number of weft threads in the running side or machine side fabric layer.

The WO 2004/085740 A2 discloses a fabric tape for a paper machine in which the connection between two layers of fabric by in this structurally involved and at intersection points between the fabric layers changing warp threads takes place. The fabric layers further comprise respective layers of weft yarns, wherein the number of weft yarns in the paper-side fabric layer is again twice as large as the number of weft yarns in the running fabric layer.

From the EP 1 605 095 A1 is a fabric tape for a paper machine is known in which the two fabric layers are formed in a band longitudinal direction extending threads, wherein in the running side fabric layer, the number of these threads is twice as high as in the paper-side fabric layer. The connection of the two fabric layers takes place by means of these with the longitudinally extending threads structurally setting and changing between the fabric layers transverse threads.

From the US 6,354,335 and the WO 2005/001197 Tissue tapes with chain ratios of 2: 1 are known. The latter document discloses the features of the preamble of claim 1.

It is the object of the present invention to provide a fabric tape for a machine for producing sheet material which has a very low marking characteristic with high wear resistance.

According to the invention, this object is achieved by a fabric tape for a machine for producing web material, in particular paper or cardboard, comprising a web material contact side providing first fabric layer with warp and weft threads and a lying under the first fabric layer second fabric layer with warp and weft threads, wherein the ratio the number of warp threads of the first fabric layer to the number of warp threads of the second fabric layer is greater than 1, viewed in the direction of the course of the weft threads, the warp threads of the first fabric layer are offset relative to the warp threads of the second fabric layer and wherein the warp ratio is not an integer is.

By selecting a warp ratio which is not an integer and greater than 1 according to the invention, a higher warp denier density is present on the web material contact side of the fabric web, with the result that a denser fabric structure with a larger number of bend points of the weft threads per Area unit is present. The marking tendency can thus be significantly reduced. At the underlying second fabric layer, the warp thread density is lower, so that especially when this second fabric layer provides the machine contact side, by appropriate thread selection the requirements occurring there can be taken into account. Due to the fact that, viewed in the direction of the course of the weft threads, the warp threads of the first fabric layer are offset relative to the warp threads of the second fabric layer, hydraulic marking in the paper web due to locally greatly differing dewatering performance is avoided. By the solution according to the invention thus the dewatering performance is considered across the width of the fabric strip comparatively.

In a preferred embodiment, a warp ratio not greater than 1.5 has been found to be very advantageous.

According to a further preferred embodiment of the invention, it is provided that the ratio of the number of weft threads of the first fabric layer to the number of weft threads of the second fabric layer is greater than 1, in particular 1.5 or 2.

Preferably, the first fabric layer and the second fabric layer are connected to each other by binding threads, wherein in particular the binding threads are arranged in pairs, the binding threads of a pair when interweaving with threads of the first and second fabric layers alternate and the binding threads of a pair when changing from weaving with Cross threads of the first fabric layer for interweaving with threads of the second fabric layer and vice versa to form intersections. This means that while one binder thread of the binder thread pair is interwoven with threads of the first fabric layer, the other binder thread of the pair interweaves with weaves at least one thread of the second fabric layer and while a binder thread of the binder thread pair with at least one thread of the second fabric layer, weaves the other binder thread of the pair with threads of the first fabric layer, wherein the binding threads of the pair when changing from weaving with threads of the first fabric layer to Interweaving intersect with threads of the second fabric layer and these intersection points are preferably arranged between the first and the second fabric layer. As a rule, in this case, the binding threads of a pair alternate with each other during interweaving with the threads of the first fabric layer so that they weave together in the first fabric layer a common weaving path.

A concrete embodiment of the invention provides that repeats the weave pattern of the fabric tape in Gesamtrapporten, wherein form the binding threads of each pair of binder thread two intersections within the Gesamtrapports.

In order to reduce the marking tendency, an advantageous development of the invention provides that not all crossing points within the repeat can be arranged on a parallel line of straight lines.

According to a further advantageous embodiment of the invention, it is provided that at least part of the weft threads of the fabric band are binding weft threads, which produce a connection between the first fabric layer and the second fabric layer.

In the following, a warp thread should generally be understood as meaning a first warp thread, which is only incorporated into the first fabric layer. A first weft thread is to be understood as a weft thread which is integrated only in the first fabric layer. A second warp thread is furthermore to be understood as meaning a warp thread which is integrated into the second fabric layer only, as a weft thread is to be understood as a weft thread which is integrated only in the second fabric layer.

Preferably, the binding weft threads structure-forming and an integral part of the first fabric layer. This means that part of the weft threads of the first fabric layer are first weft threads, another part of the weft threads of the first fabric layer are the binding weft threads and all the warp threads of the first fabric layer are first warp threads. Furthermore, this means that the first fabric layer is formed by interweaving the first warp yarns with the first weft yarns and with the binder weft yarns, wherein the first fabric layer is bonded to the second fabric layer by interweaving the binder weft yarns with the first warp yarns and second warp yarns ,

Further, by mutually interweaving the binding weft yarns with the first warp yarns, the weaving pattern formed by interweaving the first warp yarns with the first weft yarns is continued.

To provide a web material contact side or paper side with high fiber support and low marking tendency, it is advantageous if the first fabric layer forms a plain weave.

Preferably, all of the weft threads of the second fabric layer are second, i. Only in the second fabric layer integrated weft threads and all warp threads of the second fabric layer second only in the second fabric layer incorporated warp threads. In this case, the second fabric layer is formed by interweaving the second warp yarns with the second weft yarns and the first fabric layer is bonded to the second fabric layer by interweaving the binder weft yarns with first and second warp yarns. In this embodiment, the weaving pattern formed by interweaving the second warp yarns with the second weft yarns is not continued by the mutually alternating weaving of the binding weft yarns with the second warp yarns, i. the binding weft threads are not an integral part of the second fabric layer.

In particular, in this case, the second warp threads each interweaves Binding thread of a pair between two successive crossing points on the outside of the second fabric layer running a second warp or two consecutive second warp threads. If the binding weft thread crosses two second warp threads, the force for binding the first to the second fabric layer per binding thread is distributed over two second warp threads. As a result, the respectively setting second warp thread is drawn less to the first fabric layer.

In this context, the outside of the second fabric layer is to be understood as meaning the side of the second fabric layer that is exposed, i. the side of the second fabric layer which provides the running side or machine contact side of the fabric tape.

A specific embodiment of the invention provides that the weave pattern of the second fabric layer comprises four or eight second warp threads.

In the former case, the weave pattern of the second fabric layer is repeated in reports which are each formed by four second weft threads and four second warp threads, wherein each second weft thread continuously crosses three successive second warp threads on the outside of the second fabric layer, before this between the first and the second fabric layer continuously crosses a second warp thread.

In the last-mentioned case, the weave pattern of the second fabric layer is repeated in repeats which are each formed by eight second weft threads and eight second warp threads, each second weft thread continuously crossing seven successive second warp threads on the outside of the second fabric layer, before it intersects between the first and the second fabric layer continuously crosses a second warp thread.

A further concrete embodiment of the invention provides that the respective first warp threads interweaving binding weft thread of a pair between two successive The following intersections on the outside of the first fabric layer continuously crosses at least two first warp threads. In this context, it is conceivable that the first of the two binding weft threads of a pair between successive crossing points on the outside of the first fabric layer continuously crosses the same number of first warp threads as the second binding thread of the pair when weaving the first fabric layer.

In this context, the outer side of the first fabric layer is to be understood as the side of the first fabric layer which is exposed, i. the side of the first fabric layer which provides the paper side or web material contact side of the fabric tape.

It is also conceivable that the first of the two binding weft threads of a pair between successive crossing points on the outside of the first fabric layer continuously crosses a different number of first warp threads than the second binding weft thread of the pair when weaving the first fabric layer.

To achieve a particularly flat and regular paper side, it makes sense if the first warp threads weaving binding weft yarn of a pair between two successive crossing points on the outside of the first fabric layer continuously crosses an odd number of first warp threads and the middle first warp this odd number of first warp threads forming an intersection of an immediately adjacent pair of binding wefts.

Depending on the specific requirements of the fabric tape according to the invention, it may be useful if one or two first weft threads or weft threads and / or one or two second weft threads or weft threads are or are arranged between adjacent pairs of binding weft threads.

In an alternative embodiment it can be provided that the ratio of the number of warp threads of the first fabric layer to the number of warp threads of the second

Fabric layer is in particular greater than or equal to 1.5 and that the cross-sectional area of the second weft threads, ie the weft threads which are interwoven with the warp threads of the second fabric layer, in the range of 0.018 mm ² to 0.284 mm ² , preferably 0.023 mm ² to 0.197 mm ² , is most preferably greater than 0.1256mm ² . With such a large warp ratio, it is thus possible to use comparatively thick second weft threads. Due to the thick second weft threads wear resistance of the fabric tape according to the invention is significantly increased.

A further concrete embodiment of the invention provides that the ratio of the number of warp threads of the first fabric layer to the number of warp threads of the second fabric layer is in particular greater than or equal to 1.5 and that the cross-sectional area of the first warp threads is less than or equal to 0.018 mm ² , preferably is less than or equal to 0.011 mm ² , most preferably less than or equal to 0.008 mm ² . In this way, a particularly fine and mark-free paper-side first fabric layer can be provided.

Specifically, the first warp threads may have a smaller cross-sectional dimension than the second warp threads. Furthermore, it is conceivable that the first weft threads have a smaller cross-sectional dimension than the second weft threads. to provide a uniform paper side, in particular in conjunction with a plain weave of the first fabric layer, it makes sense if the first weft threads have a substantially same cross-sectional dimension as the first warp threads.

Furthermore, it is conceivable that the second weft threads have a larger cross-sectional dimension than the second warp threads.

According to a specific embodiment of the invention, it may be provided that the density of the first warp threads in the first fabric layer is 25 per cm or more, preferably 30 per cm or more, more preferably 40 per cm or more, and / or the density of the first weft threads in the first fabric layer is 25 per cm or more, preferably 30 per cm or more, particularly preferably 40 per cm or more.

According to a further embodiment of the invention, instead of a shot-tied system, a chain-bound system can be provided. In this case, at least a part of the warp threads are binding warp threads which establish a connection between the first fabric layer and the second fabric layer.

Specifically, in this case, one part of the warp threads of the first fabric layer may be first warp threads, another part of the warp threads of the first fabric layer, the binder warp threads and all weft threads of the first fabric layer may be first weft threads, wherein the first fabric layer is formed by interweaving the first weft threads with the first warp threads and is formed with the binding warp threads and the first fabric layer is connected to the second fabric layer in that the binding warp threads are interwoven with first and second weft threads.

If it is a structure-bound system, the weave pattern formed by interweaving the first warp yarns with the first weft yarns is continued by mutually interweaving the binder warp yarns with the first weft yarns.

Also in this case, the first fabric layer preferably forms a plain weave.

If the binding threads are not an integral part of the second fabric layers, then all warp threads of the second fabric layer are second warp threads and all weft threads of the second fabric layer are second weft threads, the second fabric layer being formed by interweaving the second weft threads with the second warp threads and the first fabric layer with the second Fabric layer is connected by the binding warp threads with first and second weft threads are interwoven.

In a further embodiment variant, a third fabric layer may be provided, which provides a machine contact side. It can also be provided that the number of warp threads of the first fabric layer is greater than the number of warp threads of the third fabric layer.

The warp yarns may be oriented to extend in a belt longitudinal direction, with the weft yarns then extending in a belt transverse direction providing a connection between the first fabric layer and the second fabric layer.

The fabric tape according to the invention preferably finds use as a forming fabric in a former of a paper machine which produces printable papers, in particular SC, LWC or Newsprint. The forming fabric is preferably used in a lower wire position of the former, in particular Gappformers or Langsiebformers or Hybridformers.

Due to the high abrasion resistance of the forming fabric according to the invention, it can be used to advantage in paper machines, which operate at a machine speed of 1800m / min or more, especially 2000m / min or more.

Fig. 1

in prinzipartiger Darstellung ein Gewebeband mit einem Kettverhältnis 3:2,

Fig. 2

eine der Fig. 1 entsprechende Ansicht bei einem Kettverhältnis 5:2,

Fig. 3

die Schussfadenverläufe für einen vollständigen Bindungsrapport einer ersten Ausführungsform eines Gewebebandes mit dem in Fig. 1 gezeigten Kettverhältnis 3:2,

Fig. 4

die Schussfadenverläufe für einen vollständigen Bindungsrapport einer zweiten Ausführungsform eines Gewebebandes mit dem in Fig. 1 gezeigten Kettverhältnis 3:2,

Fig. 5

die Schussfadenverläufe für einen vollständigen Bindungsrapport einer dritten Ausführungsform eines Gewebebandes mit dem in Fig. 1 gezeigten Kettverhältnis 3:2,

Fig. 6

die Schussfadenverläufe für einen vollständigen Bindungsrapport einer vierten Ausführungsform eines Gewebebandes mit dem in Fig. 1 gezeigten Kettverhältnis 3:2,

Fig. 7

die Schussfadenverläufe für einen vollständigen Bindungsrapport einer fünften Ausführungsform eines Gewebebandes mit dem in Fig. 1 gezeigten Kettverhältnis 3:2,

Fig. 8

die Schussfadenverläufe für einen vollständigen Bindungsrapport einer sechsten Ausführungsform eines Gewebebandes mit dem in Fig. 1 gezeigten Kettverhältnis 3:2,

Fig. 9

in prinzipartiger Darstellung ein kettgebundenes Gewebeband mit einem Kettverhältnis 3:2.

The present invention will be described below in detail with reference to the accompanying drawings. It shows:

Fig. 1

in principle a representation of a fabric tape with a warp ratio of 3: 2,

Fig. 2

one of the Fig. 1 corresponding view at a warp ratio of 5: 2,

Fig. 3

the weft thread courses for a complete binding repeat of a first embodiment of a fabric band with the in Fig. 1 shown warp ratio 3: 2,

Fig. 4

the weft courses for a complete binding repeat of a second embodiment of a fabric band with the in Fig. 1 shown warp ratio 3: 2,

Fig. 5

the weft courses for a complete binding repeat of a third embodiment of a fabric band with the in Fig. 1 shown warp ratio 3: 2,

Fig. 6

the weft yarn courses for a complete binding repeat of a fourth embodiment of a fabric band with the in Fig. 1 shown warp ratio 3: 2,

Fig. 7

the weft courses for a complete binding repeat of a fifth embodiment of a fabric band with the in Fig. 1 shown warp ratio 3: 2,

Fig. 8

the weft courses for a complete binding repeat of a sixth embodiment of a fabric band with the in Fig. 1 shown warp ratio 3: 2,

Fig. 9

in principle a chain-bound fabric tape with a warp ratio 3: 2.

The Fig. 1 shows in principle a representation of a section of a generally designated 100 fabric tape for the production of web material, such as paper or the like, said fabric tape 100 can be used for example or advantageously as a forming fabric.

The fabric tape 100 comprises two fabric layers 101, 102, wherein the first fabric layer 101 at the in Fig. 1 upper side, which is the outside of the first fabric layer 101, a Bahnmaterialkontaktseite 103 provides. With this web material contact side 103, the web material to be produced, for example paper, comes into direct contact. The lower or second fabric layer 102 provides a machine contact side 104. With this machine contact side 104, the fabric belt 100 comes in contact with the various of these leading, driving and deflecting rollers of a machine for producing web material.

One recognizes in Fig. 1 in that the first fabric layer 101, which provides the web material contact side 103, is constructed with warp threads OK, while the second fabric layer 102 is likewise constructed with warp threads UK. Between the warp threads OK of the first fabric layer 101 and the warp threads UK of the second fabric layer 102 is in the in Fig. 1 Example shown a Kettverhältnis of 3: 2. This means that the number of warp threads OK of the first fabric layer 101 in the fabric tape 100, for example based on a weave repeat or also based on the entire fabric tape, is 1.5 times greater than the number of warp threads UK of the second fabric layer 102 This warp ratio, which is greater than 1 but not greater than 1.5 and not an integer, has several advantages. At first it becomes possible, as well as in Fig. 1 It can be seen that thinner warp yarns OK are used for the first fabric layer 101 than the warp yarns UK of the second fabric layer 102. This in turn leads to a finer fabric structure at the web material contact side 103, with the result that the marking tendency can be lowered. At the machine contact side 104, the thicker warp threads UK can be oriented with regard to their dimensioning and also with regard to the choice of material to the high wear requirements occurring there and thus contribute to an optimized wear volume.

These two in Fig. 1 recognizable fabric layers 101, 102 or the warp yarns OK, UK thereof may be interwoven with weft threads, on the one hand in the respective fabric layers, in particular the fabric layer 101, structurally integrated, for example, to create a plain weave there, but on the other hand also switch between the fabric layers 101, 102 and realize in this way a firm connection of the two fabric layers. This shows the Fig. 3 for a weave repeat both in the warp direction and in the weft direction, in each case the course of the interwoven with the warp threads of the fabric layer 101 and the warp threads of the fabric layer 102 weft threads.

In the in the FIG. 3 shown fabric tape 100 is a weft-bonded fabric, ie, the first fabric layer 101 is connected to the second fabric layer by binding weft threads.

In all Figures 3-8 the warp threads OK of the first fabric layer 101 are first warp threads, ie warp threads, which are integrated only in the first fabric layer. Furthermore, in all Figures 3-8 the warp threads UK of the second fabric layer 102 second warp threads, ie warp threads, which are integrated only in the second fabric layer.

Accordingly, the warp threads 1, 3, 5, 6, 8, 10, 11, 13, 15, 16, 18, 20, 21, 23, 25, 26, 28, 30, 31, 33, 35, 36, 38 40, 41, 43, 45, 46, 48, 50 the warp yarns OK of the first fabric layer 101, while the warp yarns 2, 4, 7, 9, 12, 14, 17, 19, 22, 24, 27, 29, 32, 34, 37, 39, 42, 44, 47, 49 correspond to the warp threads UK of the second fabric layer 102.

The weft threads present in a weave repeat are arranged one above the other in pairs, with a pair of weft threads exclusively bound into the upper fabric layer 101 or the lower fabric layer 102 alternating with a pair of weft threads woven into the two fabric layers 101, 102 However, at intersections, they switch between them in order not only to structure-forming, but also to connect the two fabric layers 101 102 with each other. How to recognize in Fig. 3 in the top line two weft threads OS1 and US1, of which the weft yarn OS1 is integrated only in the fabric layer 101 and with the warp yarns OK the same sets in the manner of a plain weave. The weft US1 is integrated only in the fabric layer 102, in such a way that it comparatively long floats at the Outside, so the running side has to provide the highest possible wear volume here.

In the warp direction then follows a pair of weft threads B1 and B2 change between the first fabric layer 101 and the second fabric layer 102. In this way, the two weft threads B1, B2 in the fabric layer 101 actually form a single weft thread, which again bonds in the manner of a plain weave with the local warp threads OK. This is followed again by a pair of weft threads OS2, US2 of which the weft thread OS2 binds identically, like the first-mentioned weft thread OS1, while the weft thread US2 sets over other warp threads UK of the fabric layer 102.

This pattern continues with alternating layers of intersections between the weft threads of a respective pair of binding weft threads and alternating layers of tying points of the weft threads US incorporated only in the lower fabric layer 102 over a complete weave repeat. It goes without saying that in the Fig. 3 Bonding pattern shown is only one example of a structure of a fabric tape 100 having a warp ratio of 3: 2. Here a wide variety of variations in the threadlines, in the binding structures, in the positions of the crossing points, etc. can be made. Furthermore, it goes without saying that other Kettverhältnisse, for example, 4: 3, 5: 3, 5: 4, etc., can be selected. All these Kettverhältnisse are characterized by the fact that they are greater than 1, but not greater than 1.5 and continue to be not an integer. An advantage of this Kettverhältnisse is that so that a very low fabric thickness can be obtained, at the same time a very good drainage and a low water drag effect is guaranteed with low void volume.

In the present case, the weave pattern of the second fabric layer 102 is repeated in repeats which are respectively formed by five second weft threads, for example US1-US5 and five second warp threads, for example, 2, 4, 7, 9, 12 and 14. Here, each second weft threads US1-US5 on the outside of the second fabric layer 102 continuously crosses four each other following second warp threads before it crosses between the first fabric layer 101 and the second fabric layer 102 continuously a second warp thread.

The weave pattern of the fabric tape 100 is repeated in total repeats, wherein within the overall repeat the binding threads B1-B20 of each pair of binder yarns are more than two, i. form six intersections X in the specific case. For example. the binding thread pair B1, B2 forms the intersections X1-X6 within the repeat of the fabric band 100.

Considered in the direction of the course of the weft threads, the warp threads of the first fabric layer 101 are offset relative to the warp threads of the second fabric layer 102.

Further, the ratio of the number of weft threads of the first fabric layer 101, i. first weft threads OS1-OS10 and binding weft pairs, the number of weft threads of the second fabric layer 102, i. second weft threads US1-US10 are greater than 1. This implies that each pair of binder weft yarn weaves together with the first warp yarns a weaving path corresponding to the weaving path of a first weft yarn, i. the binding weft threads are an integral part of the first fabric layer 101, whereas the binding weft threads are not part of the second fabric layer 102.

Concretely, the ratio of the number of weft threads of the first fabric layer 101 to the number of wefts of the second fabric layer 102 is 2.0.

Further, the respective first warp threads 1, 3, 5, 6, 8, 10, 11, 13, 15, 16, 18, 20, 21, 23, 25, 26, 28, 30, 31, 33, 35, 36 38, 40, 41, 43, 45, 46, 48, 50 weaving binding weft B1-B20 of each pair between two successive crossing points X on the outside of the first fabric layer 101 running at least two first warp threads. Concretely, the respective first warp threads 1, 3, 5, 6, 8, 10, 11, 13, 15, 16, 18, 20, 21, 23, 25, 26, 28, 30, 31, 33, 35, 36 38, 40, 41, 43, 45, 46, 48, 50 Woven binding weft threads B1-B20 of a pair between two successive crossing points X on the outside of the first fabric layer 101 are running either two or three first warp threads.

Further, the respective second warp yarns 2, 4, 7, 9, 12, 14, 17, 19, 22, 24, 27, 29, 32, 34, 37, 39, 42, 44, 47, 49 intersect between weaving yarns of each pair two successive crossing points X on the outside of the second fabric layer 102 continuously only a second warp thread.

For example, the twine weave B1 interweaving the second warp threads B1 of the pair B1, B2 between the two successive crossing points X1, X2 on the outside of the second fabric layer 102 continuously crosses the first warp thread 12.

In the present exemplary embodiment, a first weft thread OS1-OS10 and a second weft thread US1-US10 are arranged between adjacent pairs of binding thread threads B1-B20. For example, between the adjacent pairs B1, B2 and B3, B4, the first weft thread OS2 and the second weft thread US2 are arranged.

An alternative embodiment is in Fig. 2 shown. It can be seen here that the fabric band 100 is again constructed with the two fabric layers 101 and 102, whereby now however the ratio of the warp yarns OK of the first fabric layer 101 to the warp threads UK of the second fabric layer 102 corresponds to 5: 2. This makes it possible to use for the running side fabric layer 102 even thicker and thus more wear-resistant warp threads UK. This results in that the mass of the warp threads UK of the fabric layer 102 in relation to the mass of the warp threads UK of the first fabric layer 101 is significantly larger, resulting in a very smooth-running design. Furthermore, with such a warp ratio which is greater than 1.5, it is advantageous to use weft threads with a cross-sectional area greater than 0.1256 mm ² . This applies in particular to the weft threads woven together primarily with the warp threads OK of the first fabric layer 101, which also provide the required strength at the Ensure machine contact side.

It should finally be pointed out that, of course, the principles of the invention can also find application in a fabric tape having more than two layers of fabric. For example, a third fabric layer (not shown in the figures) may be present, which then provides the machine contact side, so that the second fabric layer 102 shown in the figures is a middle fabric layer. Also in relation to this third fabric layer, the number of warp threads of the web material side fabric layer 101 may be greater, so that even between the web material side fabric layer and the running side fabric layer a warp ratio of greater than 1 is present.

Furthermore, it is pointed out that advantageously the warp threads run in a band longitudinal direction, while the weft threads run in a band transverse direction. In this way, it is possible to produce with the in the band longitudinal direction and thus the direction of the tape extending warp threads fabric tapes with almost any and woven to adapt to the length requirements sizing.

The FIG. 4 shows the weft paths for a complete binding repeat of a second embodiment of a fabric belt 100 with the in Fig. 1 shown warp ratio 3: 2.

The fabric tape 100 has a first fabric layer 101 and a second fabric layer 102. The first fabric layer 101 and the second fabric layer 102 are connected to each other by binding threads B1-B8.

In the present case, the binding threads are binding wefts and arranged in pairs. In this case, the binding threads B1-B8 of a pair, for example B1, B2 or B3, B4 or B5, B6 alternate during interweaving with threads of the first fabric layer 101 and the second fabric layer 102. Furthermore, the binding threads of a pair intersect when interweaving interweaving with threads of the first fabric layer 101 for interweaving with threads of the second fabric layer 102 and vice versa cross to form intersections X.

The first fabric layer 101 is formed by interweaving first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20 with first weft yarns OS1-OS8 and with the binding wefts B1-B8. In other words, part of the weft threads of the first fabric layer 101 are first weft threads OS1-OS8, another part of the weft threads of the first fabric layer 101 are the binding wefts B1-B8, and all the warp threads of the first fabric layer 101 are first warp yarns 1,3,5,8 , 10,11,13,15,16,18 and 20.

It should be noted here that the first warp yarns and the first weft yarns only contribute to the interweaving of the first fabric layer 101 and thus are only incorporated into the first fabric layer 101, i. the first warp yarns and the first weft yarns do not contribute to forming the second fabric layer 102.

As from the representation of FIG. 4 it can be seen, the binding threads of a pair when interweaving with threads of the first fabric layer 101 alternately from each other so that they weave together a common Web path. For example. weave the two binding threads B1, B2 of the pair with the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20 together a weaving path, ie the two binding threads B1, B2 of the pair complement each other when interweaving with the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20.

As a result of the mutually alternating weaving of the binding weft threads B1-B8 with the first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20, this is achieved by interweaving the first warp threads 1, 3, 5, 8 , 10, 11, 13, 15, 16, 18 and 20 continue weaving patterns formed with the first weft threads OS1-OS8. This means that the binding threads in the first fabric layer 101 are pattern-forming. As from the representation of FIG. 4 can be seen, the first fabric layer 101 forms a plain weave.

The second fabric layer 102 is formed by interweaving second warp yarns 2,4,7,9,12,14,17 and 19 with second weft yarns US1-US8. In other words, all the weft threads of the second fabric layer 102 are second weft threads US1-US8 and all the warp threads of the second fabric layer 102 are second warp threads 2,4,7,9,12,14,17 and 19. Here, the first fabric layer 101 is with the second fabric layer 102 connected by the binding wefts B1-B8 with the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20 and with the second warp yarns 2,4,7,9,12,14 , 17 and 19 are interwoven.

It should be noted here that the second warp yarns and the second weft yarns only contribute to weaving the second fabric layer 101, i. the second warp yarns and the second weft yarns do not contribute to forming the first fabric layer 102.

In the present case, the weave pattern of the second fabric layer 102 is repeated in repeats which are respectively formed by eight second weft threads US1-US8 and eight second warp threads 2,4,7,9,12,14,17 and 19. In this case, every second weft thread US1-US8 continuously crosses on the outside of the second fabric layer 102 seven consecutive second warp threads before it continuously crosses a second warp thread between the first fabric layer 101 and the second fabric layer 102.

The weave pattern of the fabric tape 100 is repeated in total repeats, wherein within the overall repeat the binding threads B1-B8 of each pair of binder yarns form two intersections X. For example. the binder thread pair B1, B2 forms the intersections X1 and X2 within the repeat of the fabric band 100.

According to the invention, the ratio of the number of warp threads of the first fabric layer 101, ie in the present case first warp threads 1,3,5,8,10,11,13,15,16,18 and 20, to the number of warp threads of the second fabric layer 102, ie present second warp threads 2,4,7,9,12,14,17 and 19, greater than 1. In the specific case, the ratio is 1.5.

As viewed in the direction of the weft threads, the warp threads of the first fabric layer 101, i. present, the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20, relative to the warp yarns of the second fabric layer 102, i. in the present case, the second warp threads 2,4,7,9,12,14,17 and 19, arranged offset.

Further, the ratio of the number of weft threads of the first fabric layer 101, i. first weft threads OS1-OS8 and binding weft pairs, to the number of weft threads of the second fabric layer 102, i. second weft threads US1-US8 greater than 1. This implies that each pair of binder weft yarn weaves together with the first warp yarns a weaving path corresponding to the weaving path of a first weft yarn, i. the binding weft threads are an integral part of the first fabric layer 101, whereas the binding weft threads are not part of the second fabric layer 102.

Specifically, the ratio of the number of weft threads of the first fabric layer 101 to the number of weft threads of the second fabric layer 102 is 1.5.

Furthermore, the respective first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweave bonding weft threads B1-B8 of each pair between two consecutive crossing points X on the outside of the first fabric layer 101 continuously cross at least two first warp threads. Concretely, the respective first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweave bonding weft threads B1-B8 of a pair between two consecutive crossing points X on the outside of the first fabric layer 101 ie an odd number, first warp yarns, wherein the middle one of the three first warp yarns forms an intersection of an immediately adjacent pair of binder yarns.

For example, the respective first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweave bonding weft threads B1 of the pair B1, B2 between two consecutive crossing points X1, X2 on the outside of the first fabric layer 101 running the first three warp threads 6, 8 and 10, wherein the middle one of the three first warp threads, namely, the first warp 10, a crossing point X4 and X7 of the two immediately adjacent pairs of binding wefts B3, B4 and B7, B8 forms.

Like from the FIG. 4 can be seen, each binder thread of each pair of binder threads between two successive crossing points on the outside of the first fabric layer continuously crosses the same number of first warp threads; in the specific case three first warp threads.

Furthermore, the respectively second warp threads 2, 4, 7, 9, 12, 14, 17 and 19 interweave bonding threads of each pair between two consecutive crossing points X on the outside of the second fabric layer 102 continuously crosses two successive second warp threads 2, 4, 7 9,12,14,17 and 19.

By way of example, the twine threads B2 of the pair B1, B2 weaving in each case between the two successive crossing points X1, X2 on the outside of the second fabric layer 102 continuously crosses the two successive warp threads 9 and 12.

In the present exemplary embodiment, two first weft threads OS1-OS8 and two second weft threads US1-US8 are arranged between adjacent pairs of binding weft threads B1-B8. For example, the two first weft threads OS3, OS4 and the two second weft threads US3, US4 are arranged between the adjacent pairs B12, B2 and B3, B4.

The FIG. 5 shows the weft courses for a complete binding repeat of a third embodiment of a fabric tape 100 with the in Fig. 1 shown warp ratio 3: 2.

The fabric tape 100 has a first fabric layer 101 and a second fabric layer 102. The first fabric layer 101 and the second fabric layer 102 are connected to each other by binding threads B1-B16.

In the present case, the binding threads are binding wefts and arranged in pairs. In this case, the binding threads B1-B16 of a pair, for example B1, B2 or B3, B4 or B5, B6 alternate during interweaving with threads of the first fabric layer 101 and the second fabric layer 102. Further, the binding threads of a pair intersect when interlaced from weaving with threads of the first fabric layer 101 to weave with threads of the second fabric layer 102 and, conversely, intersect to form intersections X1-X16.

The first fabric layer 101 is formed by interweaving first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20 with first weft yarns OS1-OS8 and with the binder wefts B1-B16. In other words, part of the weft threads of the first fabric layer 101 are first weft threads OS1-OS8, another part of the weft threads of the first fabric layer 101 are the binding wefts B1-B16, and all the warp threads of the first fabric layer 101 are first warp yarns 1,3,5,8 , 10,11,13,15,16,18 and 20.

It should be noted here that the first warp yarns and the first weft yarns only contribute to the interweaving of the first fabric layer 101, i. the first warp yarns and the first weft yarns do not contribute to forming the second fabric layer 102.

As from the representation of FIG. 5 it can be seen, the binding threads of a pair when interweaving with threads of the first fabric layer 101 alternately from each other so that they weave together a common Web path. For example. weave the two binding threads B1, B2 of the pair with the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20 together a weaving path, ie the two binding threads B1, B2 of the pair complement each other when interweaving with the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20.

As a result of the mutually alternating weaving of the binding weft threads B1-B16 with the first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20, this is achieved by interweaving the first warp threads 1, 3, 5, 8 , 10,11,13,15,16,18 and 20 with the first weft threads OS1-OS8 formed weave patterns continued. This means that the binding threads in the first fabric layer 101 are pattern-forming. As from the representation of FIG. 5 it can be seen; the first fabric layer 101 forms a plain weave.

The second fabric layer 102 is formed by interweaving second warp yarns 2,4,7,9,12,14,17 and 19 with second weft yarns US1-US8. In other words, all the weft threads of the second fabric layer 102 are second weft threads US1-US8 and all warp threads of the second fabric layer 102 second warp threads 2,4,7,9,12,14,17 and 19. Here, the first fabric layer 101 with the second fabric layer 102 in that the binding weft threads B1-B16 are connected to the first warp threads 1,3,5,8,10,11,13,15,16,18 and 20 and to the second warp threads 2,4,7,9,12, 14,17 and 19 are interwoven.

In the present case, the weave pattern of the second fabric layer 102 is repeated in repeats which are respectively formed by eight second weft threads US1-US8 and eight second warp threads 2,4,7,9,12,14,17 and 19. In this case, every second weft thread US1-US8 continuously crosses on the outside of the second fabric layer 102 seven consecutive second warp threads before it continuously crosses a second warp thread between the first fabric layer 101 and the second fabric layer 102.

The weave pattern of the fabric tape 100 is repeated in total repeats, wherein the binding threads B1-B16 of each pair of binder yarns form two intersections X within the overall repeat. For example. the binder thread pair B1, B2 forms the intersections X1 and X2 within the repeat of the fabric band 100.

According to the invention, the ratio of the number of warp threads of the first fabric layer 101, i. present first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20, to the number of warp yarns of the second fabric layer 102, i. in the present case, the second warp threads 2,4,7,9,12,14,17 and 19, greater than 1. In the specific case, the ratio is 1.5.

Looking in the direction of the weft threads, the warp threads are the first

Fabric layer 101, i. present, the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20, relative to the warp yarns of the second fabric layer 102, i. in the present case, the second warp threads 2,4,7,9,12,14,17 and 19, arranged offset.

Further, the ratio of the number of weft threads of the first fabric layer 101, i. first weft threads OS1-OS8 and binding weft pairs, to the number of weft threads of the second fabric layer 102, i. second weft threads US1-US8 greater than 1. This implies that each pair of binder weft yarn weaves together with the first warp yarns a weaving path corresponding to the weaving path of a first weft yarn, i. the binding weft threads are an integral part of the first fabric layer 101, whereas the binding weft threads are not part of the second fabric layer 102.

Concretely, the ratio of the number of weft threads of the first fabric layer 101 to the number of wefts of the second fabric layer 102 is 2.0.

Furthermore, the respective first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweave bonding weft threads B1-B16 of each pair between two consecutive crossing points X on the outside of the first fabric layer 101 continuously cross at least two first warp threads. Concretely, the first warp yarns 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweaving bonding weft threads B1-B16 of a pair between two successive crossing points X on the outside of the first fabric layer 101 continuously cross three first ones warps.

For example, the respective first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweave bonding weft threads B1 of the pair B1, B2 between two consecutive crossing points X1, X2 on the outside of the first fabric layer 101 running the first three warp threads 11,15 and 18.

Furthermore, not all crossing points X1-X16 can be arranged within the repeat of the fabric band 100 on a parallel line of straight lines.

Like from the FIG. 5 can be seen, each binder thread of each pair of binder threads between two successive crossing points X on the outside of the first fabric layer 101 continuously crosses the same number of first warp threads; in the specific case three first warp threads.

Furthermore, the respectively second warp threads 2, 4, 7, 9, 12, 14, 17 and 19 interweave bonding threads of each pair between two consecutive crossing points X on the outside of the second fabric layer 102 continuously crosses two successive second warp threads 2, 4, 7 9,12,14,17 and 19.

By way of example, the twine threads B2 of the pair B1, B2 weaving in each case between the two successive crossing points X1, X2 on the outside of the second fabric layer 102 continuously crosses the two successive warp threads 4 and 7.

In the present exemplary embodiment, a first weft thread OS1-OS8 and a second weft thread US1-US8 are arranged between adjacent pairs of binding weft threads B1-B16. For example, between the adjacent pairs B1, B2 and B3, B4, the first weft threads OS2 and the second weft threads US2 are arranged.

The FIG. 6 shows the weft courses for a complete binding repeat of a third embodiment of a fabric tape 100 with the in Fig. 1 shown warp ratio 3: 2.

The fabric tape 100 has a first fabric layer 101 and a second fabric layer 102. The first fabric layer 101 and the second fabric layer 102 are connected to each other by binding threads B1-B16.

In the present case, the binding threads are binding wefts and arranged in pairs. Here, the binding threads B1-B16 of a pair, for example, B1, B2 or B3, B4 or change

B5, B6 when interweaving with threads of the first fabric layer 101 and the second fabric layer 102 from each other. Furthermore, the binding threads of a pair intersect when interlaced by interweaving with threads of the first fabric layer 101 for interweaving with threads of the second fabric layer 102 and vice versa to form intersections X1-X16 crosses.

The first fabric layer 101 is formed by interweaving first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20 with first weft yarns OS1-OS8 and with the binder wefts B1-B16. In other words, part of the weft threads of the first fabric layer 101 are first weft threads OS1-OS8, another part of the weft threads of the first fabric layer 101 are the binding wefts B1-B16, and all the warp threads of the first fabric layer 101 are first warp yarns 1,3,5,8 , 10,11,13,15,16,18 and 20.

It should be noted here that the first warp yarns and the first weft yarns only contribute to the interweaving of the first fabric layer 101, i. the first warp yarns and the first weft yarns do not contribute to forming the second fabric layer 102.

As from the representation of FIG. 6 it can be seen, the binding threads of a pair when interweaving with threads of the first fabric layer 101 alternately from each other so that they weave together a common Web path. For example. weave the two binding threads B1, B2 of the pair with the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20 together a weaving path, ie the two binding threads B1, B2 of the pair complement each other when interweaving with the first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20.

As a result of the mutually alternating weaving of the binding weft threads B1-B16 with the first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20, this is achieved by interweaving the first warp threads 1, 3, 5, 8 , 10, 11, 13, 15, 16, 18 and 20 continue weaving patterns formed with the first weft threads OS1-OS8. This means that the binding threads in the first fabric layer 101 are pattern-forming. As from the representation of FIG. 6 to can be seen, the first fabric layer 101 forms a plain weave.

The second fabric layer 102 is formed by interweaving second warp yarns 2,4,7,9,12,14,17 and 19 with second weft yarns US1-US8. In other words, all the weft threads of the second fabric layer 102 are second weft threads US1-US8 and all warp threads of the second fabric layer 102 second warp threads 2,4,7,9,12,14,17 and 19. Here, the first fabric layer 101 with the second fabric layer 102 in that the binding weft threads B1-B16 are connected to the first warp threads 1,3,5,8,10,11,13,15,16,18 and 20 and to the second warp threads 2,4,7,9,12, 14,17 and 19 are interwoven.

In the present case, the weave pattern of the second fabric layer 102 is repeated in repeats, which are each formed by four second weft threads US1-US8 and four second warp threads 2,4,7,9,12,14,17 and 19. In this case, every second weft thread US1-US8 continuously crosses three successive second warp threads on the outside of the second fabric layer 102 before it continuously crosses a second warp thread between the first fabric layer 101 and the second fabric layer 102.

The weave pattern of the fabric tape 100 is repeated in total repeats, wherein the binding threads B1-B16 of each pair of binder yarns form two intersections X within the overall repeat. For example. the binder thread pair B1, B2 forms the intersections X1 and X2 within the repeat of the fabric band 100.

According to the invention, the ratio of the number of warp threads of the first fabric layer 101, i. present first warp yarns 1,3,5,8,10,11,13,15,16,18 and 20, to the number of warp yarns of the second fabric layer 102, i. in the present case, the second warp threads 2,4,7,9,12,14,17 and 19, greater than 1. In the specific case, the ratio is 1.5.

Considered in the direction of the course of the weft threads, the warp threads of the first fabric layer 101, ie in the present case the first warp threads are 1,3,5,8,10,11,13,15,16,18 and 20, relative to the warp threads of the second fabric layer 102, ie in the present case the second

Warp threads 2,4,7,9,12,14,17 and 19, arranged offset.

Further, the ratio of the number of weft threads of the first fabric layer 101, i. first weft threads OS1-OS8 and binding weft pairs, to the number of weft threads of the second fabric layer 102, i. second weft threads US1-US8 greater than 1. This implies that each pair of binder weft yarn weaves together with the first warp yarns a weaving path corresponding to the weaving path of a first weft yarn, i. the binding weft threads are an integral part of the first fabric layer 101, whereas the binding weft threads are not part of the second fabric layer 102.

Concretely, the ratio of the number of weft threads of the first fabric layer 101 to the number of wefts of the second fabric layer 102 is 2.0.

Furthermore, the respective first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweave bonding weft threads B1-B16 of each pair between two consecutive crossing points X on the outside of the first fabric layer 101 continuously cross at least two first warp threads. Concretely, the first warp yarns 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweaving bonding weft threads B1-B16 of a pair between two successive crossing points X on the outside of the first fabric layer 101 continuously cross three first ones warps.

For example, the respective first warp threads 1, 3, 5, 8, 10, 11, 13, 15, 16, 18 and 20 interweave bonding weft threads B1 of the pair B1, B2 between two consecutive crossing points X1, X2 on the outside of the first fabric layer 101 running the first three warp threads 5, 8 and 11.

Furthermore, not all crossing points X1-X16 can be arranged within the repeat of the fabric band 100 on a parallel line of straight lines.

Like from the FIG. 6 can be seen, each binder thread crosses each pair of binder threads between two successive crossing points X on the outside of the first fabric layer 101 continuously the same number of first warp threads; in the specific case three first warp threads.

For example, the first binding yarn B1 of the pair B1, B2 between the two successive crossing points X1, X2 on the outside of the first fabric layer 101 continuously crosses the three first warp yarns 5, 8, 11 and the second binder yarn B2 of the pair B1, B2 crosses between the two two consecutive crossing points X1, X2 on the outside of the first fabric layer 101 running the first three warp threads 1,15,18.

Furthermore, the binding threads of each second pair of binding threads, when these second warp threads 2, 4, 9, 12, 14, 17 and 19 interweave, intersect two consecutive second warp threads 2 between two consecutive crossing points X on the outside of the second fabric layer 102, 4,7,9,12,14,17 and 19, whereas the binding yarns of each first pair of binding yarns, when these second warp yarns 2,4,7,9,12,14,17 and 19 interweave, are interposed between two consecutive crossing points X on the Outside of the second fabric layer 102 continuously only a second warp 2,4,7,9,12,14,17 and 19 intersect. As from the representation of FIG. 6 it can be seen, each first pair of binder threads is arranged between two second pair of binder threads, as each second pair of binder threads is arranged between two first pair of binder threads.

For example, the respective second warp threads interweaving binding threads of the pair B1, B2 between two successive crossing points on the outside of the second fabric layer 102 continuously crossing two consecutive warp threads 4 and 7, whereas the respective second warp threads weaving binding threads of the pair B3, B4 between two successive Crossing points on the outside of the second fabric layer 102 constantly crossing only a second warp thread.

The aforementioned arrangement of first and second pairs of binder threads is not on the embodiment of FIG. 6 limited, but can be transferred to a variety of configurations of inventive fabric tapes.

In the present exemplary embodiment, a first weft thread OS1-OS8 and a second weft thread US1-US8 are arranged between adjacent pairs of binding weft threads B1-B16. For example, between the adjacent pairs B1, B2 and B3, B4, the first weft threads OS2 and the second weft threads US2 are arranged.

The FIG. 7 shows the weft paths for a complete binding repeat of a second embodiment of a fabric belt 100 with the in Fig. 1 shown warp ratio 3: 2.

The fabric tape 100 has a first fabric layer 101 and a second fabric layer 102. The first fabric layer 101 and the second fabric layer 102 are connected to each other by binding threads B1-B8.

That in the FIG. 7 fabric tape shown differs from that in the FIG. 4 essentially illustrated in that the weave pattern of the second fabric layer 102 is repeated in repeats which are respectively formed by four second weft threads US1-US8 and four second warp threads 2,4,7,9,12,14,17 and 19. In this case, every second weft thread US1-US8 continuously crosses three successive second warp threads on the outside of the second fabric layer 102 before it continuously crosses a second warp thread between the first fabric layer 101 and the second fabric layer 102.

Furthermore, the two fabric tapes differ in that in which in the FIG. 7 shown fabric strip of each second warp threads 2,4,7,9,12,14,17 and 19 weaving binder yarn of each pair between two successive crossing points X on the outside of the second fabric layer 102 continuously only a second warp 2,4,7,9,12,14,17 and 19 crosses.

By way of example, the twine thread B2 weaving the respective second warp threads of the pair B1, B2 between the two successive crossing points X1, X2 continuously crosses the second warp thread 12 on the outside of the second fabric layer 102.

The FIG. 8 shows the weft paths for a complete binding repeat of a second embodiment of a fabric belt 100 with the in Fig. 1 shown warp ratio 3: 2.

The fabric tape 100 has a first fabric layer 101 and a second fabric layer 102. The first fabric layer 101 and the second fabric layer 102 are connected to each other by binding threads B1-B8.

That in the FIG. 8 fabric tape shown differs from that in the FIG. 7 shown fabric tape essentially in that between adjacent pairs of binding weft threads B1-B16 respectively a first weft thread OS1-OS8 and only a second weft thread US1-US8 is arranged. For example, between the adjacent pairs B1, B2 and B3, B4, the first weft threads OS2 and the second weft threads US2 are arranged. It follows that the ratio of the number of weft threads of the first fabric layer 101 to the number of weft threads of the second fabric layer 102 is 2.0.

If a binding thread on the outside of the second fabric layer crosses one or two successive second warp threads 2, 4, 7, 9, 12, 14, 17 and 19, a tying point comprising one or two second warp threads is formed. In the in the FIGS. 4 . 5 . 7 and 8th shown in all pairs of binding threads, the distance between two tethers either two consecutive second warp threads (see FIGS. 4 and 5 ) or three successive lower warp threads (see FIGS. 7 and 8th ).

In the in the FIG. 6 shown fabric band, the distance between two binding sites in the second pairs of binding thread two successive second warp threads and the first pair of binding thread three successive lower warp threads, wherein the first and second pairs of binder thread are arranged alternately.

In all the fabric tapes shown, the first warp threads may have a smaller cross-sectional dimension than the second warp threads. Furthermore, the first weft threads may have a smaller cross-sectional dimension than the second weft threads. Furthermore, the first weft threads may have a substantially same cross-sectional dimension as the first warp threads. In addition, the second weft threads may have a larger cross-sectional dimension than the second warp threads.

Further, in the illustrated fabric tapes, the density of the first warp yarns in the first fabric layer 25 may be 25 cm or more, preferably 30 cm or more, more preferably 40 cm or more, such as the density of the first weft yarns in the first fabric layer 25 per cm or more, preferably 30 per cm or more, more preferably 40 per cm or more.

Furthermore, it makes sense if the warp threads extend in the longitudinal direction of the fabric band and the weft threads run in the transverse direction of the fabric band.

The FIG. 9 shows in contrast to those in the Figures 1-8 shown fabric tape 200, in which the first fabric layer 201 is connected to the second fabric layer 202 by pairs of binding warp BK.

The binding threads BK of a pair alternate here during weaving with threads of the first and the second fabric layer and intersect when changing from weaving with threads of the first fabric layer 201 for weaving with threads of the second fabric layer 202 and vice versa to form intersections. In this connection, the binding warp threads BK of a pair alternate with each other during interweaving with the threads of the first fabric layer 201 such that they weave together during weaving of the first fabric layer 201 a common weaving path. The two binding warp threads BK of a pair weave the first fabric layer 201 accordingly as a first warp thread.

By mutually interweaving the binding warp yarns BK with the first weft yarns, the weaving pattern formed by interweaving the first warp yarns OK with the first weft yarns is continued.

Accordingly, one part of the warp yarns of the first fabric layer 201 are first warp yarns OK, another part of the warp yarns of the first fabric layer 201 are the binder warp yarns BK arranged in pairs, and all the weft yarns of the first fabric layer 201 are first weft yarns. Since the paired binding warp yarns are structuring, the first fabric layer 201 is formed by interweaving the first weft yarns with the first warp yarns OK and with the binder warp yarns BK.

In contrast, all the warp threads of the second fabric layer 202 are second warp threads UK and all the weft threads of the second fabric layer are second weft threads, so that the second fabric layer 202 is formed only by interweaving the second weft threads with the second warp threads UK. The binding warp threads contribute nothing to the weave structure of the second fabric layer 202 here.

According to the invention, the ratio of the number of warp threads OK, BK of the first fabric layer 201 to the number of warp threads UK of the second fabric layer is greater than 1 and in the specific case is 1.5.

Claims (41)

1. Fabric tape (100) for a machine for the production of sheet material, in particular paper or cardboard, comprising a first fabric layer (101), which provides a sheet-material contact side and which is formed by interweaving warp threads (103) with weft threads (OS1-OS10), and a second fabric layer (102) which lies below the first fabric layer (101) and which is formed by interweaving warp threads (104) with weft threads (US1-US10), the ratio of the number of warp threads (103) of the first fabric layer (101) to the number of warp threads (104) of the second fabric layer (102) being greater than 1, the warp threads (103) of the first fabric layer (101), when viewed in the direction of the running of the weft threads (OS1-OS10, US1-US10), being arranged offset in relation to the warp threads (104) of the second fabric layer (102), characterized in that the ratio of the number of warp threads (103) of the first fabric layer (101) to the number of warp threads (104) of the second fabric layer (102) is not an integer.
2. Fabric tape according to Claim 1,
   characterized in that the ratio of the number of warp threads (103) of the first fabric layer (101) to the number of warp threads (104) of the second fabric layer (102) is not greater than 1.5.
3. Fabric tape according to Claim 1 or 2, characterized in that the ratio of the number of weft threads (OS1-OS10) of the first fabric layer (101) to the number of weft threads (US1-US10) of the second fabric layer (102) is greater than 1.
4. Fabric tape according to one of the preceding claims,
   characterized in that the ratio of the number of weft threads (OS1-OS10) of the first fabric layer (101) to the number of weft threads (US1-US10) of the second fabric layer (102) is 1.5 or 2.
5. Fabric tape according to one of the preceding claims,
   characterized in that the first fabric layer (101) and the second fabric layer (102) are interconnected by binding threads (B1-B20).
6. Fabric tape according to Claim 5,
   characterized in that the binding threads (B1-B20) are arranged in pairs, in that, when interweaving with threads of the first and of the second fabric layer (101, 102), the binding threads of one pair (B1/B2-B19/B20) alternate with one another, and in that, when changing from interweaving with threads of the first fabric layer (101) to interweaving with threads of the second fabric layer (102) and vice-versa, the binding threads of one pair (B1/B2-B19/B20) intersect while configuring intersection points (X1-X16).
7. Fabric tape according to one of preceding Claims 5 - 6,
   characterized in that the weaving pattern of the fabric tape is repeated in entire repeats, the binding threads of each pair of binding threads (B1/B2-B19/B20), within the entire repeat, configuring two intersection points (X1-X16).
8. Fabric tape according to one of preceding Claims 5 - 7,
   characterized in that not all intersection points (X1-X16) within the repeat are arrangeable on one parallel group of straight lines.
9. Fabric tape according to one of preceding Claims 5 - 8,
   characterized in that, when interweaving with the threads of the first fabric layer (101), the binding threads of one pair (B1/B2-B19/B20) alternate with one another such that they collectively weave a common weaving path.
10. Fabric tape according to one of preceding Claims 4 - 9,
    characterized in that at least part of the weft threads of the fabric tape (100) are binding weft threads (B1-B20) which produce a connection between the first fabric layer (101) and the second fabric layer (102).
11. Fabric tape according to Claim 10, characterized in that part of the weft threads of the first fabric layer (101) are first weft threads (OS1-OS10), another part of the weft threads of the first fabric layer (101) are the binding weft threads (B1-B20), and all warp threads of the first fabric layer (101) are first warp threads (103) and the first fabric layer (101) is formed by interweaving the first warp threads (103) with the first weft threads (OS1-OS10) and with the binding weft threads (B1-B20).
12. Fabric tape according to one of preceding Claims 10 - 11,
    characterized in that, by way of alternatingly interweaving the binding weft threads (B1-B20) with the first warp threads (103), the weaving pattern formed by interweaving the first warp threads (103) with the first weft threads (OS1-OS10) is continued.
13. Fabric tape according to one of the preceding claims,
    characterized in that the first fabric layer (101) forms a plain weave.
14. Fabric tape according to one of preceding Claims 10 - 13,
    characterized in that all weft threads of the second fabric layer (102) are second weft threads (US1 - US10) and all warp threads of the second fabric layer (102) are second warp threads (104), the second fabric layer (102) is formed by interweaving the second warp threads (104) with the second weft threads (US1-US10), and the first fabric layer (101) is interconnected with the second fabric layer (102) in that the binding weft threads (B1-B20) are interwoven with first and with second warp threads (103, 104).
15. Fabric tape according to one of the preceding claims,
    characterized in that the weaving pattern of the second fabric layer (102) comprises four or eight second warp threads.
16. Fabric tape according to one of the preceding claims,
    characterized in that the weaving pattern of the second fabric layer (102) is repeated in repeats, one repeat being formed by four second weft threads (US1-US10) and four second warp threads (104), and each second weft thread (US1-US10), running on the outer side of the second fabric layer (102), intersects three successive second warp threads (104), before said second weft thread (US1-US10), running between the first and the second fabric layer (101, 102), intersects a second warp thread (104).
17. Fabric tape according to one of preceding Claims 1 - 15,
    characterized in that the weaving pattern of the second fabric layer (102) is repeated in repeats, one repeat being formed by eight second weft threads (US1-US10) and eight second warp threads (104), and each second weft thread (US1-US10), running on the outer side of the second fabric layer (102), intersects seven successive second warp threads (104), before said second weft thread (US1-US10), running between the first and the second fabric layer (101, 102), intersects a second warp thread (104).
18. Fabric tape according to one of preceding Claims 10 - 17,
    characterized in that the binding weft thread (B1-B20) of a pair running on the outer side of the first fabric layer (101) and which in each case interweaves first warp threads (103), between two successive intersection points (X1-X16), intersects at least two first warp threads (103).
19. Fabric tape according to one of preceding Claims 10 - 18,
    characterized in that the binding weft thread (B1-B20) of a pair running on the outer side of the first fabric layer (101) and which in each case interweaves first warp threads (103), between two successive intersection points (X1-X16), intersects an odd number of first warp threads (103), and the median of the odd number of first warp threads forms an intersection point (X1-X16) of a directly adjacent pair of binding weft threads (B1-B20).
20. Fabric tape according to one of preceding Claims 10 - 19,
    characterized in that the binding thread (B1-B20) of a pair running on the outer side of the second fabric layer (102) and which in each case interweaves second warp threads (104), between two successive intersection points (X1-X16), intersects one second warp thread (104) or two successive second warp threads (104).
21. Fabric tape according to one of preceding Claims 10 - 20,
    Characterized in that one or two first weft thread(s) (OS1-OS10) and/or one or two second weft thread(s) (US1-US10) are/is arranged between adjacent pairs of binding weft threads (B1-B20).
22. Fabric tape according to one of the preceding claims,
    characterized in that the ratio of the number of warp threads (103) of the first fabric layer (101) to the number of warp threads (104) of the second fabric layer (102) is, in particular, greater than or equal to 1.5, and in that the cross-sectional area of the second weft threads (US1-US10) is in the range of 0.018 mm² to 0.284 mm², preferably 0.023 mm² to 0.197 mm², most preferably is greater than 0.1256 mm².
23. Fabric tape according to one of the preceding claims,
    characterized in that the ratio of the number of warp threads (103) of the first fabric layer (101) to the number of warp threads (104) of the second fabric layer (102) is, in particular, greater than or equal to 1.5, and in that the cross-sectional area of the first warp threads (103) is smaller than or equal to 0.018 mm², preferably smaller than or equal to 0.011 mm², most preferably smaller than or equal to 0.008 mm².
24. Fabric tape according to one of the preceding claims,
    characterized in that the first warp threads (103) have a smaller cross-sectional dimension than the second warp threads (104).
25. Fabric tape according to one of the preceding claims,
    characterized in that the first weft threads (OS1-OS10) have a smaller cross-sectional dimension than the second weft threads (US1-US10).
26. Fabric tape according to one of the preceding claims,
    characterized in that the first weft threads (OS1-OS10) have a cross-sectional dimension which is substantially identical to that of the first warp threads (103).
27. Fabric tape according to one of the preceding claims,
    characterized in that the second weft threads (US1-US10) have a larger cross-sectional dimension than the second warp threads (104).
28. Fabric tape according to one of the preceding claims,
    characterized in that the density of the first warp threads (103) in the first fabric layer (101) is 25 per cm or more, preferably 30 per cm or more, particularly preferably 40 per cm or more.
29. Fabric tape according to one of the preceding claims,
    characterized in that the density of the first weft threads (OS1-OS10) in the first fabric layer (101) is 25 per cm or more, preferably 30 per cm or more, particularly preferably 40 per cm or more.
30. Fabric tape according to one of the preceding claims,
    characterized in that the second fabric layer (102) makes available a machine-contact side.
31. Fabric tape according to one of the preceding claims,
    characterized in that a third fabric layer, which makes available a machine-contact side, is provided.
32. Fabric tape according to Claim 31,
    characterized in that the number of warp threads (103) of the first fabric layer (101) is greater than the number of warp threads of the third fabric layer.
33. Fabric tape according to one of preceding Claims 1 to 9,
    characterized in that at least part of the warp threads are binding warp threads (BK) which produce a connection between the first fabric layer (201) and the second fabric layer (202).
34. Fabric tape according to Claim 33,
    characterized in that part of the warp threads of the first fabric layer (201) are first warp threads (OK), another part of the warp threads of the first fabric layer are the binding warp threads (BK), and all weft threads of the first fabric layer are first weft threads, the first fabric layer is formed by interweaving the first weft threads with the first warp threads and with the binding warp threads, and the first fabric layer is interconnected with the second fabric layer in that the binding warp threads are interwoven with first and with second weft threads.
35. Fabric tape according to one of Claims 33 and 34, characterized in that, by way of alternatingly interweaving the binding warp threads (BK) with the first weft threads, the weaving pattern formed by interweaving the first warp threads with the first weft threads is continued.
36. Fabric tape according to one of Claims 33 to 35, characterized in that the first fabric layer (201) forms a plain weave.
37. Fabric tape according to one of Claims 33 to 36, characterized in that all warp threads of the second fabric layer (202) are second warp threads (UK) and all weft threads of the second fabric layer (202) are second weft threads, the second fabric layer (202) is formed by interweaving the second weft threads with the second warp threads (UK), and the first fabric layer (201) is interconnected with the second fabric layer (202) in that the binding warp threads (BK) are interwoven with first and with second weft threads.
38. Fabric tape according to one of the preceding claims,
    characterized in that the warp threads (103, OK) run in the longitudinal direction of the fabric tape (100, 200) and the weft threads (OS1-OS10, US1-US10, B1-B20) run in the cross direction of the fabric tape (100, 200).
39. Use of the fabric tape (100, 200) according to one of the preceding claims as a forming wire in a former of a paper-making machine producing printable paper, in particular SC, LWC or newsprint.
40. Use according to Claim 39,
    characterized in that the forming wire (100, 200) is employed in a lower wire position of the former, in particular of a twin-wire former or of a Fourdrinier wire former or of a hybrid former.
41. Use according to Claim 39 or 40,
    characterized in that the paper-making machine operates at a machine speed of 1800 m/min or more, in particular 2000 m/min or more.

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