WO2015144312A1

WO2015144312A1 - Textile grid

Info

Publication number: WO2015144312A1
Application number: PCT/EP2015/000655
Authority: WO
Inventors: Christoph Baumgart
Original assignee: Synteen & Lückenhaus Gmbh
Priority date: 2014-03-27
Filing date: 2015-03-27
Publication date: 2015-10-01
Also published as: EP3122924A1; DE102015003608A1

Abstract

A textile grid (1) consisting of two groups of direction-setting grid structure threads (2, 3) which cross each other in groups and are laid in such a way that they are connected to each other at crossing points (4) of the grid (1) and form open grid spaces, and flat textile elements (7) which are integrated into the grid structure, extend in at least one of the directions (5; 6) of the grid structure threads (2, 3), fill the open grid spaces except for through-flow locations (8) for liquids and have a laying length which, with regard to the size of an open grid space in the laying direction, is larger than the grid inner dimension (9) measured in the laying direction.

Description

Textile grid

The present invention relates to a textile grid with two groups in groups of mutually crossing directional lattice structure threads. Such a textile grid becomes practical

Use case, but not limited thereto, required for reinforcement of the substructure of roads. For this purpose, the intersecting lattice structure threads of high strength. This gives the roadbed the necessary strength in the longitudinal and transverse directions, but also offers the problem that due to the high strength of these lattice structural threads the textile grid rests relatively rigid on the ground. In particular, this may result in the further problem that the textile grid produces only a poor bond to the substrate on the one hand and to the tar layer to be applied thereto on the other hand, because it is unable to follow the ripples in the longitudinal and transverse direction, which inevitably has the subsurface ,

CONFIRMATION COPY It has therefore been attempted to create a textile grid in which the grid surfaces are traversed with a sheet material, which allows the flooding of this layer by previously applied hot bitumen or improved.

Such more or less flat, the adhesion of the textile grid on the ground improving layers have proven excellent, but are also only to a limited extent able to guarantee ripples of the substrate in the sense of a everywhere with the ground in contact lattice structure.

It is therefore an object of the present invention to further develop the known textile grid so that this disadvantage is eliminated.

The solution to this problem arises from the features of the main claim.

Of essential importance for the invention is to improve the utilization of the adhesion of the complete textile lattice on the road surface so that the relatively rigid directional lattice structures lie directly on the ground and in this way provide a reinforcement of the composite material " cause positive effect.

The invention is based on improving the reinforcing effect essentially by direct contact between the lattice structural threads, which ultimately bear the load and the adjacent tar layers of the substructure or superstructure of the road by direct adhesion to the boundary layers, even if in particular the substrate, on which the textile grid is to be placed first, has a ripple, which so far only under a considerable thick layer of bituminous adhesion promoter can be overcome.

This disadvantage is eliminated by the invention in that the surface elements contributing to the adhesion of the textile grid to the substrate are laid with a larger laying length in the finished textile grid, than the directional grid structure threads extending in each case in the same direction.

The adhesion-improving surface elements can thus follow the short-wave and long-wave ripples in the substrate and in this way draw the relatively rigid lattice structure fibers toward the substrate, so that the adhesion-promoting hot bitumen layer, which is ultimately the textile lattice before the application of the tar coating layer holds on the ground, only relatively thin is needed and the reinforcing effect of the directional lattice structure threads with respect to the composite material road "only requires a small matrix volume.

The reinforcement is therefore achieved mainly by the virtually direct contact between the adjacent tar layers, so that the micro-movement of the adjacent tar layers remains low and is not affected by material-fatiguing long-term movements.

Basically, there are various embodiments of the invention, which - depending on the purpose - based on the common principle to make the laying length of the surface elements in the respective intended reinforcing direction greater than the length of the laid in this direction lattice structure threads. A measure of this is the so-called grid internal dimension, which represents the distance between adjacent individual or bundled lattice structure threads. According to the invention, this grid internal dimension is always slightly smaller than the length of the flat elements laid in this direction, so that they can be placed close to the substrate, following the long or short waviness of the substrate, thus avoiding a lattice structure element in the air as it were ,

The lattice structural element is then pulled by the surface element flooded with hot bituminous material in the direction of the substrate, in particular also because the flat elements are only slightly longer than the respective internal grid dimension.

The oversize of the surface elements results practically from the amplitude of the waviness and, taking into account the grating structure elements, can also be approximately calculated.

The flat elements act because they are inundated or impregnated by the hot bituminous bonding agent, depending on the material and porosity of the flat elements, in the sense of a holding layer that holds the textile grid in spite of the necessary grid rigidity in the direction of the ground.

Conveniently, the textile grid is made so that it is opened as a role. This offers the advantage that the roll material practically in the longitudinal direction of the substrate - here the road - can be handled immediately before the upper tar layer is applied. The roll width is on the order of between about 1 and about 5 meters, but can also be significantly wider when it comes to the use of such textiles grid for highways.

In order to further improve the adhesion of the textile grid to the substrate, it is proposed to coat the grid with bitumen or bitumen-like material outside of the grid surfaces which are necessary for flooding the flat elements.

This measure makes use of previously applied hot bituminous materials on the road surface for an immediate material-bound connection between the road surface and textile grid by the corresponding adhesive properties of the hot bituminous layer on the one hand and the bituminous coating of the textile grid on the other hand. The permeability of the flat elements in the normal direction to the textile grid is necessary so that the hot-bituminous bonding agent can flood the laid on him textile grid. Therefore, the permeability is of considerable importance.

According to the invention, they should each form on both sides of the flat elements between in each case two adjacent groups of the lattice structure threads, so that sufficiently large free cross sections in the textile lattice are also available for the process of flooding of the flat elements.

With suitable measures, the permeability points can then also be reinforced along the entire length of the lattice structure threads in their respective installation direction. with the exception of those points that are required by the other group of lattice structural threads.

The flat elements can be formed by Lunten, preferably Glasfaserlunten.

In each case several Lunten can be introduced between two adjacent groups of the lattice structure threads. These Lunten have however in each case a larger one

Length within each grating surface, which is limited by the groups of the lattice structure threads and thus contribute to the invention improved retention effect on the road surface at.

On the other hand, the flat elements can also be long strips or foils or comparable nonwoven material having a width which is smaller than the grid internal dimension, so that laterally of these flat elements also sufficiently large and long permeability sites form, which are necessary for flooding the flat elements in the laying of the textile grid are.

The advantage of these flat elements is, in particular, that they can be laid both in one direction and in the other direction of the respective lattice structure threads in order to meet the respective requirements of road construction companies in this way. The necessary Durchlässigkeitsstellen side of the

Long belts / films or similar nonwoven materials can be caused in particular by exploiting the shrinkage effect. For this purpose, the material of these long strips, etc. in the width direction should be compared to the material of the grid Structural threads in the same direction have the greater shrinkage behavior.

This ensures that the long strips, foils or comparable nonwoven materials can be shrunk in their direction transverse to the laying direction by a heat process, but the lattice structure threads lying in the same direction should not or only in all cases be shrunk less so that The 10 permeability points are therefore easy to produce.

The excess length of the flat elements in relation to the length of the running in this direction lattice structural threads can be achieved in various ways.

! 5

However, all embodiments have in common that ultimately the flat elements run with a larger laying length within the grating free surfaces than the grating internal dimension measured in the same direction.

20

The excess length of the flat elements can be realized, for example, by an increased feed speed of the flat elements in relation to the speed of the lattice structure threads laid in the direction of the flat elements.

5

The increase in the feed rate is in one part per thousand to one-digit percentage range and can possibly be optimized by experiment. On the other hand, it can also make sense to provide the flat elements of a material with predetermined shrinkage behavior, while the running in the laying direction lattice structure threads then have a relation to this shrinkage behavior increased shrinkage behavior.

5 In that case, the excess length of the flat elements can be treated by simple temperature treatment of the pre-fabricated textile grid with a temperature corresponding to the shrinkage temperature of the directional lattice structural threads. It will then use a shrinkage of these lattice structural threads, which is stronger than any shrinkage of the flat elements, so that in the finished fabric grid after shrinking the flat elements ultimately run with an excess length in their individual lattice free surfaces.

The textile grid essentially consists of the direction-giving and the tensile strength-providing lattice structure threads and the flat elements used as laying optimizers.

The direction-giving lattice structure threads can therefore be designed in the form of a tissue or a lamina bound at their intersections.

The bond between the directional lattice structure threads can, except by interweaving at this point readily be performed as a bond. Preferably, the lattice structural threads at least the

Material of one of the two groups of a shrinkable material, for example polyester or similar plastics. It should be expressly stated here that it does not depend on a three-dimensional structure of the finished textile grid, but that only the excess length of the flat elements located in the grid rake surfaces is required according to the invention in order to increase the adhesion in direct contact of the grid structure threads on the To achieve the background. Furthermore, the invention relates to a device for producing one of the two embodiments of the textile grid according to the invention.

In this case, it is assumed that a conventional weaving machine in which the lattice structure threads on the one hand from a warp beam or a gate coming processed as warp threads and on the other hand by a weft insertion as a weft yarn.

In this regard, reference is made to the known prior art. Essential to such a weaving machine with regard to the invention is an additional device for the bands to be woven. The long goods materials (belts) to be woven in are guided via belt heald frames with their own specialist training. The band weaves extends in principle over the entire machine width for the production of the textile grid and the shedding of the band heddle takes place alternately with the shedding of the warp threads.

The alternating shedding ultimately leads to a loose integration of the flat elements in the interconnected at the intersection of lattice structure threads, which is sufficiently stable in order to then lead the material over a Bitumentränkvorrichtung with downstream squeezing and downstream heater.

The bonding of the flat elements to the transverse to their longitudinal direction lattice structural threads thus creates a stable and easy to transport product in the form of a role, which can then be easily processed on site ultimately. This device is advantageously equipped with band Webschäften, which are provided for guiding the wide-extending long belts or the like.

Therefore, the yarn eyes required for this purpose also have broad guiding properties and are either configured as wide-lying elliptical, oval thread eyes or have laterally open cross-sections, from which the long objects fed via the thread eyes can project laterally. There are also roller pairs into consideration, which are either free-spinning or rotationally driven at conveying speed. Conveniently, the flat elements are supplied individually coming from a feed gate or they come from a tree and must be cut before the individual laying in the lattice open areas on a slitter in narrower long bands before they are then fed to the band-Webschäften.

In this case, the width of the tree from which the Langgutmaterial is subtracted, less than the width of the warp beam, since naturally the respective widths of the individual Kettfäden of the Langgutmaterial may not be occupied.

In the following the invention will be explained in more detail by means of exemplary embodiments.

Show it:

1 shows a first embodiment of the invention in top view;

Fig. la embodiment gem. Fig.l in the direction Ia; 2 shows another embodiment of the

Invention;

2a embodiment according to. 2 in direction of view IIa;

3 shows another embodiment of the

Invention gem. Fig.l;

4 embodiment of the invention, laid on uneven ground in cross section;

Fig.4a background in top view;

5 shows another embodiment of the

Invention;

Fig.6 upstream band-Webschäfte;

Figure 7 subordinate band-weaving shafts;

8a shows a first embodiment of

Invention for a wide guide;

8b shows another embodiment of the

Invention for a wide guide;

8c still another embodiment of the invention for a wide guide, motor driven;

9 shows a device according to the invention

Delivery mechanism for the flat elements.

Unless otherwise stated below, the following description applies to all figures.

The figures show a textile grid according to this invention.

Such textile grid consists of two groups of groups mutually crossing directional lattice structure threads 2; 3. This creates a large-meshed grid, which is formed by ckende grid clearing surfaces and in which at the intersections 4 of the grid 1, the respective groups are routed together. Significantly, in at least one of

Directions 5; 6 of the lattice structural threads 2; 3 extending textile flat elements laid 7 embedded, which on the one hand fill the said grating free surfaces, leaving permeabilities 8 for liquids and on the other hand, in view of the dimension of a grating surface in the laying direction have a greater laying length, as measured in the laying direction grid internal dimension 9. Die Flat elements 7 therefore have a greater length in the length of the textile grid, so that they can adapt better to the substrate under consideration of the geometric conditions on an uneven surface than the pure grid structure threads could.

This invention therefore has the advantage that the lattice terstrukturfäden be laid on the one hand without additional excess on the substrate to be reinforced, while on the other hand, the flat elements of the predetermined between the individual lattice structural thread contour of the ground due to their excess length can easily follow and in this way outside the Reinforcement points provided by the lattice structural threads can contribute their positive contribution to the reinforcement as an intermediate layer.

It is also essential that the textile grid is opened as a roll 10.

In particular Fig.la shows the longitudinal view of the textile grid according to the invention and there in particular also the respective excess with which the individual flat elements within the grid, which is spanned by the lattice structure threads, are laid. It is not a limitation of the invention if the oversize of the flat elements is present not only in a single direction within the textile grid, but also in the direction transverse thereto, as a result of a preformed curvature, as shown for example in FIG. so that the flat elements can then also insert into corresponding depressions of the substrate as soon as they are glued there, for example over bitumen-hot material.

In order to promote this, all parts of the textile grid outside the lattice open areas are coated flat with bitumen or bitumen-like material, so that when laid in previously applied hot bituminous material, the bicompaction can then intimately bond with the hot bituminous material and in this way the textile Grid is held on the ground despite the relatively rigid grid structure threads.

As can easily be understood from FIGS. 1 to 4, for this embodiment of the invention that the dimensions of the flat elements 7 transversely, that is in the transverse direction 11 to the laying direction, the Durchlässigkeitsstel- len 8 between each two adjacent groups of the lattice structure threads. 2 ; 3 in the laying direction form.

The laying direction is here by the presentation of the textile grid as a role (see Fig.2a), the longitudinal direction of the role, so that there are relatively long textile mesh, which can be easily easily laid even on large areas.

The present invention is characterized in that the flat elements 7 are long strips or foils or a comparable nonwoven material, the width is smaller is as the grid internal dimension and of which in each case one in the longitudinal direction of the grille between two adjacent longitudinally extending lattice structure threads 2; 3 is integrated. This applies to the exemplary embodiments shown according to FIGS. 1 to 3, wherein the flat elements can be introduced into the textile grid in various ways. For this purpose, the material of the long belts or

Films or comparable nonwoven material in the width direction relative to the material of the lattice structural yarns 2,3 in the same direction have the greater shrinkage behavior.

This variant offers the advantage that, in a downstream coating and heating process, the shrinkage behavior of the flat elements in the transverse direction without further measures leads to the fact that the grating flanks form out.

In a particular exemplary embodiment, the excess length of the flat elements 7 is achieved by pushing them into the production process at a predetermined conveying speed, so that the excess length of the flat elements 7 is proportional to a feed rate of the feed line, which is higher than the speed of the lattice structure threads laid in this direction Flat elements is, so corresponds to the excess of the differential speed between the speed of the flat elements 7 and the speed of the lattice structure threads.

Another possibility for producing the excess length of the flat elements results from the fact that the lattice structure threads in the direction of laying of the flat elements 7 have a predetermined shrinkage behavior and that after the Laying and the production of the finished textile grid, the excess length of the flat elements 7 is proportional to a temperature after the laying of the flat elements 7 shrinkage of the laid in this direction shrinkable lattice structural threads.

This applies to lattice structural threads both in the longitudinal and in the transverse direction, alternatively or cumulatively. As is shown with reference to FIG. 5 for one exemplary embodiment, the lattice structure threads 3 extending in the transverse direction here are of strong shrinkage behavior compared with the flat elements 7 laid in the same direction. As a result of a heat treatment after the laying of the

Flat elements and extending in this direction lattice structural threads shrinkage of the finished textile lattice in this direction, which is stronger than the shrinkage behavior of laid in the same direction flat elements, so that they are then present with a length excess in the textile grid.

The textile grid according to FIG. 5 is here more shrinkable in the transverse direction than in the longitudinal direction.

However, this is not a limitation of the invention thereto, at any rate as long as the shrinkage behavior of the lattice structure threads laid in the same direction as the flat elements is greater than the shrinkage behavior of the flat elements.

In the embodiment gem. 5, the flat elements are formed in contrast to the embodiment of Figures 1 to 3 from a flattened sliver, which are introduced several times in the respective lattice structure threads. In the exemplary embodiment of FIGS. 1 to 3, the flat elements are formed by a film, ribbon or similar nonwoven material whose width in the finished textile grid is smaller than the grid internal dimension.

According to FIG. 2, this flat material can be pulled off a roll 20 whose width is practically smaller than the width of the finished textile grid. The width of the roll 20 of the flat material corresponds to the width of the finished textile grid minus the running in the same direction total width of all lattice structural threads.

The flat material withdrawn from the roll must then be cut into individual strips via corresponding longitudinal cutting devices 21, which are then to be inserted into the respective inner grid dimension.

As a comparison of FIGS. 1 and 5 shows, the direction-giving lattice structure threads 2, 3 can be designed in the form of a fabric or a lamina bound at the intersections 4.

Advantageously, then the lattice structure threads 2, 3 of at least one of the two groups of a shrinkable material, here the lattice structure threads with the reference numeral 12th

The shrinkable material may preferably be polymeric plastic material, for example polyester, polyamide or comparable plastic material.

In contrast to the production method according to FIG. 2, in which the flat element 7 is drawn off from a roll 10 as a whole and then divided into individual longitudinal elements, in the process according to FIG. element 7 withdrawn from a single roll 10 and each supplied to a point of the textile grid in the longitudinal direction. It is, so to speak, a deduction gate with individual rollers for each one continuous flat element 7 over the entire length of the textile grid.

4 also shows, in relation to the representation 4a, which gives a view from above onto the ground, before the textile grid is laid on it, that the textile grid 1 according to the invention is in excellent condition to the contour of the ground consequences. The lying between the lattice structural yarns 2 flat elements 7 are full on the ground, which, according to Fig.4a, for example, may consist of a milled tar ground.

Usually, such a tar subsoil is milled down as deep as necessary when rebuilding a road in order to be able to apply a new fine layer to it.

The longitudinal depressions introduced by the milling tools into the substrate come back more or less periodically, corresponding to the respective point where a corresponding cutting tooth runs.

In addition, FIG. 6 shows a device according to the invention for producing a textile grid 1, insofar as this is new for the invention.

Such a device is a weaving machine, of conventional design, in which the lattice structural threads 2; 3 in the one direction 5 warp threads 13 and in the other direction 6, the weft threads 14 are. The textile grid according to the figures 1 to 3 is characterized in that the flat elements 7 extend in the warp direction. For this purpose, a band weaving shank 15 with an upstream shed, which is shown in FIGS. 6 and 7 on the left side, is used.

In this case, the band weave shank 15 guides the respectively supplied flat elements 7 to form a shed in the direction of the weft insertion at different positions, depending on the arrangement of the band weave shank 15 in front of or behind the healds intended for the warp threads. The band weaving shank 15 has in particular wide guides

16, through which the sheet 7 is fed therethrough.

The wide guides 16 may be designed as wide-oval thread eyes 17, as shown for example in Figure 8a.

Similarly, the width guide 16 may also be designed as a simple transverse slot 18, through which the flat material 7 is passed.

The Breitschlitzausführung is open at the side and has there rounded edges in order not to destroy the registered flat material laterally or aufzuribbeln. It is essential that the band-hive 15 to the reins to

Shedding of the warp threads before or can be subordinate.

6 shows, by way of example, the arrangement of the band weaving shank 15 relative to the compartment for shedding in a pre-arranged arrangement, while FIG. 7 shows the arrangement downstream of the shank for the warp threads. In any case, the band heald 15 is in all cases designed as a shank with its own shed, the shedding alternating with shedding of the warp threads.

8b shows a wide guide, which is formed from a pair of rotatably mounted rollers, which are freely rotatable in this embodiment.

Deviating from this, FIG. 8c shows a development in which a conveyor roller pair is provided for the flat elements, which is driven via an external drive in the conveying direction of the flat elements 7.

It is, so to speak, a delivery mechanism 25 with which the speed of feeding the flat elements is easily controllable. In addition to this, FIG. 1 shows a further development in which the flat elements 7, coming from a roll 20 as a broad material, are first fed to a longitudinal cutting device 21 and then to the strip weaving shank 15. The illustration corresponding to Figure 9 corresponds to the illustration corresponding to Figure 2 with the addition that the flat elements, which are supplied here from the roll, via a delivery mechanism 25 a the band weaving shank 15 (not shown) are delivered.

The belt delivery unit 25a consists of a controlled electric motor drive, so that the feed speed of the flat elements can be kept constant or specified as needed. 2 a further development of the device according to the invention, in which the already finished fabric grid 1 is guided via a bitumen dosing device 22 and, after passing through a corresponding trough, is guided past a heating roller 24 via a pair of squeezing rollers 23, initially around the applied one liquid bitumen material on the one hand ausquetschen to a small thickness and then dry quickly.

It is also essential that, as shown in particular Figures 6 + 7 show the shedding of the supplied flat elements, if they are laid in the warp direction, via heald frames, which have pairwise provided wide guides 16, so that these wide guides turn that for laying the flat elements necessary own compartment can form.

LIST OF REFERENCE NUMBERS

1 textile grid

2 lattice structure threads, first direction

3 lattice structural threads, second direction

4 intersection

5 first direction

6 second direction

7 flat element

8 permeability point

9 grid internal dimension

10 roll

11 transverse dimension of 7

12 shrinkable grid structure thread

13 warp direction 5

14 weft direction 6

15 band weave

16 wide guide

17 thread eye, wide - oval

18 transverse slot

19 feed gate

20 roll

21 longitudinal cutting device

22 bitumen dosing device

23 squeezing device

24 heating device

25 delivery plant

Claims

Patent claims

Textile grid (1) consisting of two groups of mutually crossing directional grid structure threads (2; 3), which are laid connected to one another to form grid open spaces and at crossing points (4) of the grid (1) and are integrated into the grid structure in at least one textile flat elements (7) running in the directions (5; 6) of the lattice structure threads (2,3), which on the one hand fill the lattice open areas leaving permeability points (8) for liquids and whose laying length, viewed based on the dimension of a lattice open area in the laying direction, is on the other hand greater than is the inner grid dimension (9) measured in the laying direction.

Textile grid (1) according to claim 1, characterized in that the textile grid (1) is presented as a roll (10).

3. Textile grid (1) according to claim 1 or 2, characterized in that the textile grid (1) outside the Grid open areas are coated with bitumen or bitumen-like material.

4. Textile grid (1) according to one of claims 1 to 3, characterized in that the dimensions of the flat elements (7) transversely (11) to the direction in which they are laid determine the permeability points (8) between two adjacent groups of the grid structure threads (2; 3). in the laying direction.

5. Textile grid (1) according to claim 4, characterized in that the permeability points (8) extend along the length of the grid structure threads (2; 3) in the laying direction.

6. Textile grid (1) according to one of claims 1 to 5, characterized in that the flat elements (7) are long strips or foils or a comparable nonwoven, the width of which is smaller than the inner dimension of the grid and one of which is between two adjacent ones in the longitudinal direction of the grid Lattice structure threads (2; 3) running in the longitudinal direction are integrated.

7. Textile grid (1) according to claim 6, characterized in that the material of the long strips has the greater shrinkage behavior in the width direction compared to the material of the grid structure threads (2; 3) in the same direction.

8. Textile grid (1) according to one of claims 1 to 7, characterized in that the excess length of the flat elements (7) is proportional to the speed of the grid laid in this direction. structural threads (2; 3) increased feed speed of the flat elements.

Textile grid (1) according to one of claims 1 to 7, characterized in that the grid structure threads (2; 3) have a predetermined shrinkage behavior in the laying direction of the flat elements (7) and that the excess length of the flat elements (7) is proportional to one after the Laying the flat elements (7) is temperature-related shrinkage of the shrinkable lattice structure threads (12) laid in this direction.

Textile grid (1) according to claim 9, characterized in that the material of the flat elements (7) has a shrinkage behavior which is lower than the shrinkage behavior of the grid structure threads (2; 3) in the laying direction of the flat elements (7).

Textile grid (1) according to one of claims 1 to 10, characterized in that the directional grid structure threads (2; 3) are designed in the form of a fabric or scrim bound at the crossing points (4).

12. Textile grid (1) according to one of claims 1 to 11, characterized in that the grid structure threads (2; 3) consist of at least one of the two groups made of a shrinkable material (12).

13. Textile grid (1) according to claim 1, characterized in that the shrinkable material is polymeric plastic material, for example polyester, polyamide and the like. Device for producing a textile grid ( 1 ) in the form of a fabric, the grid structure threads (2; 3) in one direction (5) the warp threads (13) and in the other direction (6) the weft threads

(14) are and in which band heald shafts (15) with prior shedding are provided, for flat, ribbon-shaped material for the flat elements (7), which alternates over the reed width with the shedding of the warp threads (13).

Device according to claim 14, characterized in that the band heald frames

(15) -preferably- have a wide guide (16) for the flat elements (7) at the level of the thread eyes for the warp threads (13) or just before.

Device according to claim 15, characterized in that the wide guide

(16) a broad elliptical oval thread eye

(17).

Device according to claim 15, characterized in that the wide guide (16) has a laterally open transverse slot

(18).

Device according to claim 15, characterized in that the wide guide (16) is formed by a rotatably mounted pair of rollers, preferably freely rotatable.

Device according to one of claims 14 to 18, characterized in that the flat elements (7) are fed individually from a feed gate

(19) can be supplied incoming.

20. Device according to one of claims 14 to 19, characterized in that the flat elements (7) as wide material coming from a roll (20) can first be fed to a longitudinal cutting device (21) and then to the band heald frames (15).

21. Device according to one of claims 14 to 20, characterized in that a bitumen impregnation device (22) with a squeezing device (23) is provided downstream.

22. The device according to claim 21, characterized in that a heating device (24) is arranged downstream of the squeezing device (23).

23. Device according to claims 14 to 22, characterized in that the shed formation takes place via band heald frames (15), which have wide guides (16) provided in pairs.

24. Device according to claims 14 to 23, characterized in that the flat elements (7) are delivered to the band heald frames (15) via a delivery mechanism (25).