NL2007049C2 - METHOD OF ATTACHING EACH OTHER AT THE CONSTRUCTION SITE WITH TANGLE BELT OF STRIPED ARTIFICIAL GRASS OF A ARTIFICIAL GRASS MAT LAYING ON AND LAYING NEXT TO EACH OTHER. - Google Patents

Description

Method for attaching to each other at the construction site with Velcro strips of artificial grass rolled out or spread out and lying next to each other of an artificial grass mat to be laid loosely on the substrate.

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This invention relates to a method for laying a temporary or permanent, loosely laid artificial turf that is made up of separate, unrolled, artificial turf strips, which can be rolled up again, and which are attached to each other by Velcro so that they form a whole so that can be played, played, played and / or recreated safely. Incidentally, the invention can also be applied to carpet that has been laid as temporary or permanent floor upholstery in, for example, an office, living room, event hall or exhibition space and over which one walks.

A temporary artificial grass mat with Velcro attachment that is not laid loose is offered under the designation Limonta Portable Artificial Turf System (Limonta system). This system consists of separate shock-absorbing plates with a size of 1.22 by 2.44 meters. A piece of artificial turf is attached to this rectangular plate of EVA foam by an adhesive layer covering the entire surface of the plate. The size of the piece of artificial grass mat is larger than that of the plate, so that the artificial grass mat protrudes four centimeters beyond the plate along all four sides. The underside of these overhanging grass strips is equipped with one part of a Velcro assembly. There are furthermore coupling strips of the same material as the plate and having a width of eight centimeters and a length slightly longer or shorter than the long or short side of the plate. These connecting strips are provided on their top side over their entire surface with the other part of a Velcro assembly. By now placing the plates in a rectangular pattern at a distance of eight centimeters from each other on a surface, such as a concrete floor, the edges of the projecting grass strips of the adjacent plates adjoin each other exactly. By subsequently folding back the protruding grass strips on the associated plate, the eight centimeters wide gap between the 2 plates is made accessible from above. Thus, a coupling strip can be placed therein to fit snugly with one part of the Velcro mounting on the top. By subsequently folding back the protruding grass strips on the intermediate coupling strip 5, those grass strips are attached to the coupling strip via the Velcro mounting, so that a whole is created, with a dimension of, for example, 30 by 15 meters.

WO 02/076560 A and US 2007/0098925 A disclose the use of Velcro mounting in the installation of an artificial grass field, however in a manner different from the present invention.

The inventor has now devised to replace the usual glued connection between artificial grass strips of a traditional, loosely laid artificial grass mat with a Velcro assembly.

By 'loosely laid' it is meant that the mat with at least the largest of its surface lies loosely on the substrate and is therefore not glued to it, such as with the Limonta system, or is attached to the substrate in a large way. The artificial mat is preferably secured to the substrate with the edges so as not to shift and to remain free of creases during use. The artificial mat is further tensioned.

The object of this invention is to provide a method for fastening strips lying next to each other with Velcro which, upon realization of a high-quality, durable and yet releasable attachment, can be used as quickly as possible with as little effort as possible. manpower can be performed.

To this end, the invention is according to the subject matter of the claims below. The artificial turf is thus built up at the location from separate, preferably rectangular (elongated or square) artificial turf strips that are each rolled into a roll or collapsed into a package and are spread out on the construction site and with each strip on the underside along the edges to be attached to another strip or substantially over the entire surface 3 are provided with one or other part of a Velcro assembly (the part with the large number and closely placed hook parts or the part with the large number and close together loop parts placed, such as felt), so that the adjacent edges of two adjacent strips enter a Velcro connection with each other via the parts of the Velcro mounting, with the intervention of a separate connecting strip which is equipped with one and / or the other part of Velcro mounting, while the 10 strips are spread out so that the edges of the next to each Adjoining strips are head-end or bumped or with minimal or no overlap or with close or no gaps.

According to the invention, one or more of the following operations are carried out: - two grass strips with Velcro material permanently attached thereto at the bottom are laid substantially side by side in the final position by spreading on and sliding over the substrate; the separate connecting strip of Velcro material 20 is first definitively secured by means of Velcro fastening to one of the two grass strips to be attached to each other, wherein a locally effective pressing force moves along the length of the grass strip and the separate connecting strip gradually brings it to the grass strip and onto the grass strip. Velcro material located thereon presses and tangles, so that the part of the connecting strip downstream of the pressing force is permanently clipped to the grass strip and the part of the connecting strip upstream of the pressing force is free of the grass strip and is preferably remote from it. Preferably a tensile force is exerted on the part of the connecting strip upstream of the pressing force, so that this part is kept tightly tensioned. Preferably the edge of the grass strip to which the connecting strip is to be clipped is turned over, preferably over the entire length, so that the Velcro material on this edge of the grass strip is turned upwards; 4 the separate connecting strip which is attached to one grass strip continues with a protruding edge strip past the one of the two grass strips to be attached to each other, in order to be situated with that edge strip underneath the other grass strip 5 and to be glued to it, said edge strip preferably occupies approximately half the width of the connecting strip; the edge of the one grass strip with the connecting strip and the edge of the other grass strip thereon are laid next to each other in the desired end position, preferably by knocking back of the edge of the one grass strip from the temporarily turned position, the one and preferably / or other grass strip remains substantially in place, taking care that the connecting strip runs upwards from the underside of the one grass strip through the gap between the grass strips and protrudes above the grass strips with the projecting edge strip; the edge of the other grass strip is temporarily accommodated in a local area moving along the edge to establish the Velcro connection with the connecting strip. One or more of the following preferably applies: a pick-up force moves along the grass strip; the free part of the connecting strip protruding above the grass strip is pushed by a compressive force below the other grass strip in the received area to come to lie spread out on the substrate; spreading the part of the connecting strip to be tangled with the other grass strip takes place in a local area moving along the grass strip 30 substantially coincident with the received area of the other grass strip; downstream of this local moving area the connecting strip is completely spread on the substrate and both grass strips rest on it, while upstream of this local area the connecting strip protrudes above the grass strips; - the edge strip of the connecting strip protruding above the grass strips is brought underneath the other grass strip in the area in which the other grass strip is temporarily accommodated in order to spread out below it; the edge of the other grass strip is turned over its entire length to provide room for the protruding edge strip of the connecting strip to spread over the substrate, whereafter the edge of the other grass strip is turned back over its entire length; after the protruding edge strip of the connecting strip has been spread over the substrate, the edge of the other grass strip is pressed on it so that the desired permanent Velcro connection is established; a separate release strip is applied to the separate connecting strip, removal of which is necessary to achieve the desired permanent Velcro connection. Preferably for this release lane one or more of the following applies: at least covers the projecting edge strip of the connecting strip, entirely or substantially entirely; covers the protruding edge strip of the connecting strip such that this protruding edge strip remains substantially free of a Velcro fastening with the edge of the associated (other) grass strip; protrudes from under the grass strip through the gap between the grass strips to above the grass strip; is removed after both grass strips and the separate connecting strip have been brought into the final position spread on the substrate, for example by pulling in the longitudinal or transverse direction; is temporarily clamped under a grass strip with a longitudinal edge, for example outside the area that overlaps with the connecting strip.

The part of the Velcro assembly can be mounted on the strip in the factory, so under ideal conditions. During the production of the artificial grass strip on a roll, for example 4 meters wide, in the usual manner, the part of the Velcro assembly, for example a felt layer, can be applied by, for example, calendering or otherwise laminating on the grass strip coming from the production machine, after which the grass strip is rolled up.

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When assembling on site, the strips are usually supplied rolled up and rolled out on the substrate on site. After the strips are attached to each other, the artificial turf is usually pulled tight by pulling on the outer edges 5 to smooth out folds. The temporary or permanent playing field is made up of two or more artificial grass strips that can be attached to each other by Velcro with the edges.

It is preferred that all grass strips of the artificial grass mat fixed to each other are provided on the underside over substantially the entire surface with a part of the Velcro mounting, preferably all grass strips with the same part of the Velcro mounting. As an alternative, this does not have to be the case for every grass strip, for instance it is conceivable to equip most strips (in the factory or on location) only with a part of the Velcro assembly along the edges, for instance when it has been intended that those strips cannot be shortened or made narrower, and then equip one or more over the entire or substantially entire surface with a part of the Velcro assembly, which strips of grass are intended to shorten or narrow, thus to be regarded as a type of passtrips.

It should be clear that of all the grass strips, the part of the Velcro mounting does not extend beyond the grass strip, in other words, remains within the boundary determined by the size of the grass strip. Thus, a separate connecting strip (or mounting strip) is needed with the other part of the Velcro mounting, which connecting strip overlaps the two edges to be joined to each other and is glued to it for making the permanent, but characteristic for Velcro tape easily detachable and then detachable make it again, connection.

Preferably the invention does not belong to the group of embodiments in which the part of the Velcro fastening fixed to the underside of the grass strip extends beyond the grass strip, for example of an artificial grass strip the bottom side is equipped with a part of the Velcro assembly which substantially the entire 7 covers the surface of the strip and, moreover, protrudes outside the strip along, for example, one edge, so that by placing two strips next to each other, the edge of the one grass strip comes to lie on the protruding part of the part of the Velcro assembly on the adjacent grass strip. In such a case, a separate connecting strip would be superfluous.

It should be clear that the edges of the grass strips to be connected to each other are detachably attached to each other by a lap joint. It should also be clear that, even for a permanent playing field, in particular in the open air, the Velcro mounting is the replacement for the traditional glue mounting.

The playing field can be assembled from only adjacent strips and also from adjacent strips and in line with one another and possibly transverse strips. When assembling a playing field from both adjacent and in line with and / or transversely laid strips, the strips can be kept limited in length so that the weight of a roll can be limited.

Preferably, all grass and connecting strips can be rolled into a roll.

With the invention one or more of the following can be provided: the strips connect more neatly to each other, which benefits the flatness of the playing field; the field can be installed and removed faster; fewer parts are needed; the parts can be handled and stored more easily, the installation of an outside field can be carried out under all weather conditions, the durability of the connecting seam is better.

The pile of the artificial grass consists, for example, of a mixture of straight and curled fibrillated and / or monofilament fibers protruding from a basic mat.

The artificial grass can be used with or without infill (granular, scatterable material of, for example, sand and / or rubber with which the artificial grass fibers are scattered on site to be substantially embedded therein) and preferably laid directly on a leveled, shock-absorbing, pressure-resistant substrate that is, for example, also temporary and for this purpose is constructed, for example, from rigid sheets of foam.

For example, the substrate is formed from a large number of plates placed side by side and behind one another in a rectangular pattern, which sides lie close to each other with their longitudinal and transverse edges and are detachably attached to each other, for example by fitting the edges together, as in puzzle pieces, and lie loose on a substrate, for example concrete subfloor. Or the foundation is a loose-cast foundation. The artificial grass is laid loosely on the substrate, so it can always shift relative to the substrate and can be picked up again directly from the substrate.

The artificial grass mat is made of a mat from which synthetic fibers protrude, thus resembling a long-pile carpet, and between these fibers there is preferably a granular filler material (infill) to keep the fibers substantially upright and to provide the web with resilience . For a synthetic lawn, the ends of the fibers protrude a little bit above the infill, so that the exposed fiber ends mimic the appearance and playing characteristics of a lawn.

The mat is, for example, woven from synthetic fibers and parallel rows of synthetic fibers or ribbons are tufted therein in a division of, for example, 3/16 or 3/8 ".

When applying the invention to a permanent outdoor playing field for, for example, official competition purposes, the only necessary change from a conventional playing field, such as for football, hockey or tennis, is that the strips are attached to each other by Velcro mounting instead of a glued assembly. The substrate on which the artificial turf is laid will as a rule not deviate from what has been customary so far, wherein said substrate comprises, for example, a sports-technical layer 35, is draining and possibly contains drainage pipes.

With the permanent playgrounds hitherto customary, 4-meter-wide artificial grass strips are laid side by side and 9 with 30-centimeter-wide mounting strips (so-called glue carrier) on the spot with 2-component grease, the adjacent edges of the artificial grass strips are permanently attached to each other. This mounting method is replaced by the Velcro mounting 5. The Velcro parts are installed in the factory under well-conditioned conditions. And years later, the artificial turf can be dismantled in the original strips by detaching the Velcro parts from each other.

The invention also offers advantages for the do-it-yourselfer when laying an artificial grass lawn in the garden.

In addition to the above, the present invention can thus relate to a playing or sports field with a top layer of artificial grass, for example for football, tennis, athletics or hockey or other outdoor sports. The field has a water-permeable top layer, such as an artificial mat, of for instance plastic / polymer material. The field is, for example, founded on a package of bonded or unbound granular material poured into the work, this package preferably being frost-free and / or permeable to water. The granular material can be stony or a mixture of stony granules and granules of other types.

In particular, the invention can relate to a permanently laid-out playing field, i.e. it is only removed after one or more years, generally after 10 or 15 years or longer. For the playing or sports field use may be made of a so-called pressure-distributing cloth on which the top layer may or may not have been directly superimposed. The pressure-distributing fabric is a bonded or partially bonded layer of plastic fibers that have been combined into a mat. The pressure-distributing fabric is chosen to be sufficiently smooth, so that during application the top layer can easily slide over it while the pressure-distributing fabric and the material underneath remain slid-free. This is important in order to be able to tighten the top layer properly during laying and to be able to lay the field bump-free. For example, the pressure-distributing fabric 35 fixes the so-called ones which are generally directly below.

technical layer or other layer deposited in the work.

Below or above the pressure-distributing fabric, but below the top layer 10, there may still be one or more other fabrics or the like woven or non-woven fiber layers or other cloth-like or foil-like cohesive layers, for example an e-layer or a foam layer or a heat-insulating layer, such as Enkaflex 20 or 5 Enkaspacer 5025 or Enka underlay 10.

The following can be stated about the top layer in combination with which the invention is preferably applied:

The top layer, for example, covers a surface of at least 500 or 1000 square meters. The top layer is preferably based on a mat of plastic fibers (e.g. PE and / or PP), for example with a division 3/8 or 5/16 or 5/32 (8, 16 or 32 stitches on respectively 3, 5 or 5 inch mat length or width). Application for the following division margins is conceivable: between 3/4 and 3/12; between 5/12 and 5/20; between 5/28 and 5/36. The pole height can be between 10 and 100 mm, such as between 35 and 70 mm (for example for football) or between 20 and 25 mm (for example for tennis or hockey). Plastic fibers forming the pile protrude from the mat. These are, for example, fibrillated fibers, monofilament fibers or mixtures thereof (i.e. a pitch contains both fiber types). Fibrillated fibers are made by extruding a film of, for example, polypropylene (PP) and / or polyethylene (PE), cutting it into narrow strips and providing each strip with many incisions so that many very narrow strips are created side by side, two adjacent strips still attached to each other at different places along their length. Monofilament fibers are individually extruded threads that may have a round or angular cross-sectional shape in addition to a flat one.

The fibers of the top layer are tufted into the (flat-woven) base mat, so that loops protruding from the base mat are formed, which are then cut open so that blades of grass are simulated. Instead of tufting, the fiber can also be incorporated into the base mat in a different way, for example knotted.

EXAMPLE

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The invention is described below, without being limited thereto, on the basis of an example of a permanent playing field in the open air: An artificial grass field is constructed as follows: At the bottom there are drainage pipes. Immediately or at some distance above it is a buried sand package that has been dumped into the work. On top of that lies a layer, poured into the work, so-called sport-technical unbound layer (for example a mixture of sand and / or rubber and steagran or lava-10 stone). The pressure-distributing fabric lies on top of it. The artificial grass mat is lying thereon (semi-bonded, since it is sprinkled with infill of loose rubber granulate and / or sand). The sport-technical layer is water-permeable and ensures a flat and stable surface for the turf. The sand package ensures good drainage and projects sufficiently deep to ensure frost-free construction. The sand package and / or sports technical layer can be replaced by a different material layer. One or more further material layers may be added. The drainage pipes can be omitted or replaced by another drainage system.

The sports-technical layer consists, for example, of an unbound grain mixture of stony material of large and small grains, for example with a diameter mainly in the range of 1 mm to 20 mm. Thus, this layer consists of an unbound stable mineral skeleton with load spreading and bearing capacity, the inevitable space between larger grains being occupied by smaller and even smaller grains while guaranteeing water permeability. Rubber granules may be added thereto. The sand package consists of an unbound grain mixture of stony material of small grains, for example with a diameter mainly in the area smaller than 2 or 3 mm. Layer thicknesses are preferably as follows: sports-technical layer 5 to 10 cm; sand package at least 5 or 10 cm.

The grass strips are provided on the underside over the entire surface with the loop part of the Velcro (for example felt). Symmetrically beneath the seam between two adjacent grass strips is a connecting strip of 30 cm wide from the hook part of the Velcro, to which the loop parts lying thereon are hooked on the edges of the grass strips.

The method of the invention is further elucidated with reference to the accompanying schematic drawing.

FIG. 1 shows a side view;

FIG. 2 shows an end view of different phases;

FIG. 3 shows an end view of different phases;

FIG. 4 shows a side view in section.

The various parts shown in the drawing are shown at a distance from each other, for the sake of clarity of the representation.

FIG. 1 shows a grass strip 1. A felt layer 2 is laminated on its underside. The grass strip 1 is upside down, so that the felt layer 2 is turned upwards. The representation shows the moment at which a connecting strip 3, with the hook parts of the Velcro mounting, can be permanently and without damage detachable, attached to the felt layer 2. A locally effective pressing force (arrow P) moves (arrow A) along the length of the grass strip. This force P gradually brings the separate connecting strip 3, the hooking surface of which faces downwards, towards the grass strip 1 and presses it onto the felt 2 and tangles both together. The part of the connecting strip downstream (in the drawing on the left) of the pressing force P 25 is permanently clipped to the grass strip and the part of the connecting strip 3 upstream of the pressing force P is free from the grass strip and is remote from it. A tensile force (arrow F) is exerted on the part of the connecting strip 3 upstream of the pressing force P, so that this part is kept taut. The connecting strip 3 is gradually unwound from a roll 4 as the process proceeds.

FIG. 2 shows different stages during the bonding of two grass strips 1 and 5. At the moment 0, the two grass strips are spread out on the substrate and lie with their edges against each other. Then the edge of grass strip 1 is turned over the entire spring (arrow B), to go to stage 13 I. In stage I the connecting strip 3 is applied in the manner of Fig. 1. If the connecting strip 3 is arranged along the entire length of the grass strip 1, the edge of the grass strip 1 is knocked back along the entire length and stage II is reached . In stage II, the connecting strip protrudes over the entire length from below the grass strip 1 through the gap 6 between the heads of grass strips 1 adjoining one another and protrudes above the grass strips 1, 5.

Stage III is reached by turning over (arrow B) of the edge of grass strip 5 over the entire length. The connecting strip 3, attached to the grass strip 1, can now be fully spread over the entire length on the substrate in one movement (dotted arrow U). The edge of grass strip 5 is then folded back over its entire length (arrow 15 B), so that end stage IV is reached. In stage IV, the separate connecting strip 3 is glued to the felt 2 of both grass strips 1, 5.

Alternative stages are conceivable, for example stage UIA instead of stage III. At stage UIA, the edge of grass strip 5 is not turned over. Instead, the edge of the grass strip 5 is temporarily taken up in a local area moving along the edge. For this purpose a pick-up force (arrow F) moves along the grass strip. FIG. Fig. 4 shows in the section along line ZZ in Fig. 2, stage UIA, how in this local, moving area (arrow A) the grass strip 5 is received by the force F. The free part of the connecting strip 3 protruding above the grass strip are pushed by a compressive force (arrow D in Fig. 2, stage UIA) under the grass strip 5 in the received area, to lie spread out on the substrate. The spreading of the part of the connecting strip 3 to be tangled with grass strip 5 also takes place in a local area moving along the grass strip 5 substantially coincident with the received area of the grass strip 5. Downstream (left in the drawing) of this area, the connecting strip 3 is completely spread out on the substrate and both grass strips 1, 5 rest on it (as in stage IV). Upstream of this area, the 14 connecting strip 3 protrudes above the grass strips (as in stage II). For this reason, in Fig. 4 the connecting strip 3 is only visible in the left half of the drawing.

FIG. 3 shows the use of a release lane 7.

Stage III *, IV * and IV + are shown as alternatives to stages III and IV in Fig. 2. In stage III *, the release lane 7 is applied so that it comes to lie on grass lane 1, on the still completely spread out part of the connecting strip 3 and with the edge under grass strip 5 to be clamped by grass strip 5 to prevent unintentional shifting or blowing up. In stage IV * the release liner 7 is grasped by the edge protruding above the grass lanes and pulled sideways (arrow F), so that the liner liner 7 is completely removed and thereby the connecting liner 3 can also engage the felt 2 of liner liner 5 to enter the desired Velcro connection.

Stage IV + shows a considerably narrower release lane 7 compared to stage IV *, which lies only on the part of the connecting lane 3 that must be clipped to grass lane 5, and remains entirely under grass lanes 1, 5. A further alternative is conceivable in which the release lane 7 is clamped underneath the grass lane 5 outside the connection lane 3 and / or is located with an edge under grass lane 1 (in which latter case grass lane 1 is only partially clipped to the liner 3). The release liner 7 is removed from stage IV + by grasping one end and pulling in the longitudinal direction.

Claims (9)

1. Method for attaching to each other at the construction site with Velcro strips of rectangular strips of artificial grass rolled or spread out and lying next to each other at the final location on a substrate 5 of a synthetic turf mat to be laid loosely on the substrate with a pile upwards from a basic mat protruding synthetic fibers, using a separate connecting strip (3) of Velcro material, for making a permanent, integral football field for official games with a top layer loosely laid on the ground, from a large number of individual strips of artificial grass and by pulling on and securing the outer edges stretched artificial turf with an area of at least 500 square meters, wherein the artificial turf strips are each rolled up from the factory into a roll or collapsed into a package and spread on the construction site and wherein the factory in which the grass strips are produced, each grass strip on the underside along the edges to be attached to another grass strip (grass strip with Velcro) or over substantially the entire surface (grass strip with Velcro backing) equipped with lamination, is provided with one or the other part of a Velcro assembly (the part with the large number and closely placed hook parts 25 or the part with the large number and closely placed loop parts, such as felt). 2. Method as claimed in claim 1, wherein it is ensured that the respective part of the Velcro assembly remains within the contour of its grass strip and ends up flush with the outer edge of its grass strip, so that for all grass strips the adjacent edges of two overlaps are placed next to each other without overlapping grass strips enter a Velcro connection with each other via the parts of the Velcro mounting via a lap seam connection, using a separate connection strip supplied on a roll that is equipped with one and / or other part of a Velcro mounting and a Velcro connection with the Velcro edge or Velcro backing of both grass strips by overlapping both of approximately the same width. 3. Method as claimed in claim 1 or 2, wherein the artificial turf is composed of a combination of grass strips with Velcro and grass strips with Velcro, wherein the grass strips with Velcro are trimmed during installation on location to shorten and narrow them and thus be used 10 as pass strips between grass strips with Velcro. 4. Method as claimed in claim 1, 2 or 3, wherein the grass strips are spread out in such a way that the edges of the adjacent grass strips abut against one another, i.e. without overlap 15, and in that condition are permanently secured to each other by the Velcro assembly. 5. Method as claimed in any of the claims 1-4, which artificial turf is laid on a pressure-distributing cloth above a loosely poured foundation which contains a sports technical layer, is draining and contains drainage pipes at the bottom, and after laying is sprinkled with a granular scatterable embedding material (infill) that embeds the upright fibers so that they are held upright and with the free ends protrude a little bit above the embedding material so that the exposed fiber ends mimic the appearance and playing characteristics of a natural grass field. 6. Method as claimed in any of the claims 1-5, and years later 30, the artificial turf is disassembled in the original strips by undamaging detachment and removal of the connecting strips by removing the Velcro fastening. 7. Method according to one of claims 1-6, wherein one or more of the following operations are preferably performed successively in the indicated order: two grass strips (1, 5) with Velcro material (2) permanently attached thereto at the bottom substantially juxtaposed in the final position by spreading on and sliding over the substrate; 5. it is ensured that the edge of the grass strip (1) to which the connecting strip is first attached is turned over the entire length, so that the Velcro material on this edge of the grass strip is turned upwards; the separate connecting strip (3) of Velcro material is, over approximately half its width and along its entire length, first permanently secured by means of Velcro fastening to the one (1) of the two grass strips to be attached to each other, preferably with a locally effective pressing force (P ) moves along the length of the grass strip and gradually brings the separate connecting strip to the grass strip (1) and presses on and adheres to the Velcro material located thereon, so that the part of the connecting strip downstream of the pressing force is permanently attached to the grass strip and The portion of the connecting strip upstream of the pressing force is free from the grass strip and is remote from it while a pulling force (F) is exerted on the portion of the connecting strip upstream of the pressing force, so that this portion is kept tightly tensioned, and the connecting strip (3) about its half bree protruding beyond the respective grass strip (1); the edge of the one grass strip (1) with the connecting strip (3) attached thereto is brought back from the temporarily turned over position back to the final position, so that the connecting strip runs upwards from the bottom of the one grass strip through the gap between the grass strips and with the protruding edge strip protruding above the grass strips (Fig. 2, phase II); the edge of the other grass strip (5) is temporarily accommodated in a local area moving along the edge to establish the Velcro connection with the connecting strip (Fig. 4), to which a local pick-up force (F) along the the strip of grass extends and the free part of the connecting strip protruding above the strip of grass is locally pushed under a pressure force (D) under the other strip of grass (5) in the receiving area to come to lie spread out on the substrate, whereby spreading the the part of the connecting strip to be tangled to the other grass strip (5) takes place in a substantially coincident local area moving along the grass strips (1, 5) so that downstream of this local moving area the connecting strip is completely spread out on the substrate and both grass strips rest on it (Fig. 2, phase IV), while upstream of this local area the connecting strip k protrudes above the grass strips (1.5); after the protruding edge strip of the connecting strip 15 has been spread over the substrate, the edge of the other grass strip (5) is pressed on it so that the desired permanent Velcro connection is established. 8. Method as claimed in any of the claims 1-7, wherein one or more of the following operations are preferably performed successively in the indicated order: the edge of the other grass strip is turned over its entire length around the protruding edge strip of the connecting strip provide room to spread out over the substrate, after which the edge of the other strip of grass is folded back over its entire length; after the protruding edge strip of the connecting strip has been spread over the substrate, the edge of the other grass strip is pressed on it so that the desired permanent Velcro connection is established; a separate release strip is applied to the separate connecting strip, removal of which is necessary to achieve the desired permanent Velcro connection. 35 A method according to any one of claims 1-8, wherein one or more of the following applies to this release liner: at least completely or substantially completely covers the projecting edge strip of the connecting strip; covers the protruding edge strip of the connecting strip such that this protruding edge strip remains substantially free of a Velcro fastening with the edge of the associated (other) grass strip; protrudes from under the grass strip through the gap between the grass strips to above the grass strip; is removed after both grass strips and the separate connecting strip have been brought into the final position spread on the substrate, for example by pulling in the longitudinal or transverse direction; is temporarily clamped under a grass strip with a longitudinal edge, for example outside the area that overlaps with the connecting strip.