DE7127087U - VELCRO CLOSURE - Google Patents

Description

Essen, July 12, 197I

PATENT LAWYERS (37 ΐ85 / Τΐ)

Dr. Andrej e \ v ski
D r. - I η g. II ο η Ic e
Dipl.-Ing. Gesthuysen

43 Essen, Thcaterplatz 3

ELVERSELE, naamloze vennootschap, Elversele (Belgium). "Velcro fastener"

The present invention relates to Velcro fasteners, i.e. to quick-release fasteners of the type characterized Kind of that two ribbons or strips against each other

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As is well known, there are two different types of quick release fasteners Implementation options: in the first implementation, the system consists of two bands, one of which is interconnected cooperating sides are provided exclusively with hooking elements, while in the second embodiment the effective side of one band with hooking elements and the effective side of the other band with hooked in, mostly loop-shaped element! is provided.

The Velcro of the second type have been preferred because they guarantee a better closure than the first type, due to the simple fact that a larger percentage of the closure elements is actually involved in locking effect. The Velcro fasteners of the first type have the advantage that they only consist of a single type of Velcro tie or strip, which is not

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only makes their industrial production significantly easier and much more economical, but also a lighter, more economical one and enables a more secure supply of raw materials.

The present invention is now the task of creating a Velcro fastener of the first type, using only one type of tape, the hooking ratio, i.e. the percentage effective, is more effective Elements, is still just as good as with the Velcro fasteners of the second type mentioned, i.e. with the simultaneously with active, hooking elements and passive hooked elements.

The Velcro fastener consists essentially of a mostly tape or strip-shaped fabric, one side of which is provided with a large number of loops, which have a high density, consist of plastic thread and the shape have a closed curve in such a way that they consist of two branches that diverge and then converge, as a result, they are exposed to internal stress; during the aforementioned loops, after heating the Open the parting and each time two diverging branches form, which are provided with a hooking head and are planted at an angle with respect to the central plane of the fabric, so that this plane is provided with a large number of arbitrarily directed hooking elements, which of course leads to a leads to a large hooking ratio, even when the fabric is subjected to the action of a tensile force and thereby stretched becomes, whereby it is of course a tissue sufficient

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I «· · present Invention 1 -3- description some Elasticity must act. The license plates and Advantages of i training will be carried out by the following incoming

Modes of execution explained. This description, given merely as an example without any restrictive intention, takes place on the basis of the accompanying drawing where

Figure 1 schematically shows a perspective view of part of a Velcro fastener according to the invention reproduces;

Figure 2 shows part F2 of the Velcro fastener according to Figure 1 on an enlarged scale;

FIG. 3 schematically shows a side view of a tape or strip according to the invention; and

Figure U schematically shows a side view of an elastic, stretchable band or strip according to the invention.

As explained in Figures 1, 2 and 3 of the accompanying drawings, a Velcro fastener according to the invention consists only of a single type of tape or strip (Ribbon or strip 1), whereby the relevant ribbons or strips are mostly fabric and are provided on one side with numerous plastic loops 2 of great density.

As a result of their nature, shape and even method of attachment in one and the same plane, the loops 2 have a certain internal tension, as a result of which they have a tendency to spontaneously expand.

The pad 3 is an arbitrary one

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fabric made by suitable methods which may be reinforced in any arbitrary manner, provided, of course, that this can be cleaned up with the formation of the loops in question "after the creation of the loops The vertices of the fabric are heated at a temperature not lower than the melting point of the Loop material, as a result, two typical ones Effects result: firstly, the opening of all loops each time in two separate branches 5 and 6, which now continue diverge than in the original loop; second, the formation of a hooking head 7 at the free end of all Branches. The composition and shape of the loops on the one hand and the duration of the melting process on the other hand are such chosen so that the outside diameter D of the hooking heads formed in this way differs as little as possible from the height the underside of the hooking heads 7 gemestsnen distance Dl between two consecutive branches originating from two different loops.

All of this has the consequence that the branches S and 6 of the hooking elements obtained in this way are inclined with respect to the Level of the underlying fabric 3 are planted, with no single direction being preferred, i.e. the relevant hooking elements are oriented completely arbitrarily.

The 2 Selected synthetic threads are e.g. chain threads «(e.g. polypropylene threads). This provides the distribution that when heated up a temperature which corresponds to the melting point of the Schlexfen material or is slightly higher, Ine smaller

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hanging enamel forms, which turns out to be extremely beneficial for the flawless formation of the desired hooking heads 7. For many applications of the Velcro fasteners in question, the tape provided with hooking elements must not have any longitudinal or transverse elasticity exhibit. Such tapes or Velcro fasteners consisting of such tapes are particularly useful all so-called static applications in question. With many others. Applications, on the other hand, are belts, i.e. according to the invention Velcro fasteners which have good longitudinal or transverse elasticity are preferred, provided of course that this does not impair the functionality of the system, i.e. the interlocking relationship in the interaction of two such Ligaments is not degraded.

In figure U the main elements of such a having good longitudinal elasticity, i.e. in the Longitudinally stretchable tape according to the invention schematically reproduced. According to this embodiment, there is

the ribbon provided with loops made of a base fabric, its weft threads 8-19 multifilament nylon threads and its warp threads multifilament nylon threads 20 together with threads 21 made of a natural or synthetic elastic material. The weft threads 9-10, 12-13, 15-16, 18-19, etc. are arranged in pairs one above the other, with the elastic thread 21 between the pairs of weft threads and runs over the threads 8, 11, 14, 17, etc. The multifilament nylon threads 20 run zigzag over the weft threads 8,9,11,12,14,15,17,18. The loops 22,23,24,25 etc. consist of additional chain threads (e.g. polypropylene threads).

An additional thread 26, i.e. here for example a polypropylene thread, forms the first loop 2 2 and then continues under the two weft threads 9 and 10, above the weft thread 11 and under the two weft threads 12 and 13 to form a second loop, etc. A second additional thread 27, here for example also a polypropylene thread, forms a loop 2 3 and then continues under the two weft threads 12 and 13, over the weft thread 14 and under the two weft threads 15 and 16 to form a second loop, etc.

After weaving, the ribbon provided with loops in this way is usually subjected to a suitable heat treatment exposed to secure the threads 26, 27 ... forming the loops 22, 23, 24, 25 ... firmly in the base fabric. the The temperature and the duration of this heat treatment are of course to be selected according to the type and thickness of the threads concerned. It it is usually necessary to stretch the tape a little during this heat treatment to make it as flat as possible. To the To maintain the elasticity of the fabric, to give the tape sufficient strength and the loops 22, 23, 24, 25 etc. to stick firmly in the fabric, the tape is made by soaking or painting with a suitable finishing agent Sufficient permanent elasticity, such as a suitable latex, trimmed. The tape is under during the sizing sufficient tension held, but which is to be regulated in such a way that no stretching of the tape during the spreading of the Finishing agent and the subsequent drying takes place. The one sufficiently hardened during the heat treatment

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Finishing layer guarantees sufficient adhesion of the single thread hooks in the tissue, whereby the tape can largely be stretched and stretched without the risk of undesired deformation of the Fabric and the loops.

The band with loops as shown in the illustration 4 can be stretched 100%. From this figure it can be seen immediately that the elastic thread 21 stretches when that Belt is put under tension, i.e. when it is subjected to the action of a tensile force. The inextensible threads 20 des Fabric show a zigzag course between the weft threads 8-19, the zigzag profile in question flattening out during the stretching of the tape and in the direction of tension, i.e. thus also in the direction of deformation of the closure in question, can be stretched.

After the production of the ribbon provided with loops according to the method described above, the am The vertices of the loops 22, 2, 3, 24, 25, etc. furthest from the tissue, as in the previous example, on the melting point of the loop material (here e.g. polypropylene) or a slightly higher temperature, which in the same way as in first example of hooking up the desired size, mutual position and direction.

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Claims (7)

ArJSFRUCHE
1.- Velcro fastener tape, characterized in that that it consists: firstly, of a mostly ribbon or »strip-shaped GeweL? (3), one side of which has a large number Loops (2) is provided, which have a high density, consist of a suitable plastic thread and the shape of a closed curve, in such a way that they consist of two branches (5,6) which are initially diverging and converging further. consist, as a result of which they are subjected to an internal tension, and secondly the vertex of the aforementioned loops is heated, whereby these open and each time form two diverging branches (5,6), which with one Hooking head (7) are provided and are planted at an angle with respect to the central plane of the aforementioned fabric (3), so that this plane carries a large number of hooking elements in an arbitrary direction. 2.- Device according to claim 1, characterized in that that
identifies / the mentioned loops made of polypropylene threads are made; 3.- Device according to claim 1, characterized in that the relevant loops (2) such are chosen that the number of hooking elements per surface unit for example, for a 0.30 mm thick polypropylene thread, about 130 hooking elements resulting from 65 loops per cm2 amounts to. 4.- Device according to claim 2, characterized in that that the polypropylene threads for the formation of the loops (2) together with the weft and warp threads of the Base fabric (3) are woven in, which weft and warp 712708730.1171 threads of any suitable natural or synthetic Fiber according to the type and properties of what is to be produced Velcro fastener are made. 5.- Device according to claim 1, characterized that the plastic chosen for the production of the loops (2) is a polyolefin. 6.- Device according to claim 1, characterized in that the relevant with loops (2) auögestattete Fabric (3) is an elastic fabric. 7.- device according to claim 6, characterized in that that the relevant band or strip-shaped Fabric <3) is made by interweaving threads, some of which are mostly warp threads (21) elastic. 712708730.1171