MXPA00003926A - Paired heddles for use on looms - Google Patents

Abstract

Weaving heddles, intended for paired operation, are rendered spring-like resilient in the areas adjacent the end eyes to prevent breakage of the heddles in operation by the high degree of dynamic loading. Such spring-like resiliency is achieved by a provision of a shape change, such as a recess or inwardly bowed section, in the heddles adjacent the end eyes and at a location between the adjacent end eyes and the elongated shaft section of the heddle body.

Description

LIZO MESHES TO BE USED BY COUPLES The present invention relates to heald meshes to be arranged in pairs for weaving in the case of a high density of warp yarns. The invention relates to heald meshes, which are used in pairs, to make the fabric possible in the case of high densities of warp yarns. In a pair of healds, respectively one of them is configured in such a way that the eye of the thread is in a back line, and the second heald is configured in such a way that the eye of the thread is in a front line. By moving the eyelets out of the theoretical center of the heald plane, the step for the warp yarns is also considerably increased at the widest point of the heald, that is, in the eyelet of the yarn. In itself, this type of healds is well known in practice and is shown correspondingly in Figures 1, 2 and 9, which will be referred to hereinafter. The current looms reach a very high number of revolutions, which has as a consequence that the frames for healds are strongly deformed during the operation. due to the high dynamic loads. This deformation reaches a measure such that it cancels and even exceeds the play with which the healds are arranged in lines on the heal carrier rails in heald frames. Exceeding the play of the healds results in their being subjected to lengthening solicitations. The heald meshes of the present embodiments, which were designed constructively starting from an aspect essentially of symmetry, present a form which is in some cases unsuitable for this type of solicitations. The heald meshes indicated with numbers 1, 8, 32 and 34 have a high elongation strength compared to heald meshes with numbers 2 and 9. The consequence of this is that the heald meshes indicated with the numbers 1 , 8, 32 and 34 tend very quickly to tear when under traction. Starting from the above considerations, the aim of the invention is to provide a heald, or a pair of healds, which brings with it for both types of the pair of healds a solidity, or, similar elasticity of elongation. In the above, we must seek to maintain the full functionality of current heald meshes, that is, they must be able to process in the usual retractable machines, they must be able to be transported in the same way and they must be able to be used on the same frames for heddles. According to the invention, the objective is achieved by means of heald meshes to be arranged in pairs according to the special text of claim 1. According to the invention, the objective is achieved by making the end eyelets more elasticly directed of both heddles of the pair, which are relatively solid to the elongation, by means of the conformation of the zone that is between the final eyelets and the main part of the heddle. It is proposed that each of the two heald meshes present on that lateral edge extending closely adjacent to the respective wire eyelet, correspondingly close to the final eyelet or in the area of the final eyelets, a variation of shape, as preferably a notch or cut inwardly bent, and / or that the end eyelet is configured openly. In accordance with a preferred embodiment, at least one of the two heald meshes or both, in the area which respectively follows the end eyelets in the direction of the yarn eyelet, are elastically designed, presenting a flexure. In the dependent claims, preferred embodiments of the heald meshes to be arranged in pairs are characterized. In the following, the invention is illustrated in more detail by way of example and with reference to the appended figures. They show: Figures 1 and 2, respectively a pair of heald meshes in accordance with the prior art. Figures 3 and 4, respectively, a pair of heald meshes configured in accordance with the invention. Figures 5 to 8, respectively a heald mesh configured in accordance with the invention, intended for use in heald meshes arranged in pairs. Figure 9, another pair of heald meshes in accordance with the prior art. Figure 10, a pair of heald meshes, configured in accordance with the invention. And Figure 11, a single heald mesh, suitable for use in a pair of heald meshes configured in accordance with the invention. Figure 1 shows a pair of heald meshes according to the prior art, which presents the two healds 1 and 2 with the two eyelets 4 and 6 arranged in the center and displaced from each other. A row perforation 17 is also observed, as well as patterns 18, which are also known by the prior art. Similarly, Figure 2 shows a new pair of heald meshes in accordance with the prior art, consisting of the healds 8 and 9 with the wire eyelets 4 and 6 arranged in the center. In the operation of the pairs of heald meshes according to Figures 1 and 2, it has been observed that respectively the two heald meshes 1 and 8, which have a high elongation strength, tend very quickly to tear when under tension. , while the respectively other heald meshes 2 and 9 of the two pairs are maintained without damage even under a high load. The reason for this different behavior can be that the two heddles 2 and 9 present in the area between the final eyelets and the main part of the heald, they have a greater elasticity than the two heddles 1 and 8. Therefore, in accordance with the invention it is proposed, as can be seen, for example, in Figures 3 and 4, that the two healds of the pair of healds respectively are elastically configured in the area between the final eyelets and the main part. The foregoing is achieved, for example, in Figure 3 in the heddle 23, by providing the recesses 11 and 11 or, in Figure 4 in the heddle 28, the recesses 14 and 14 '. As required, or, previously proposes the invention, these recesses 11, 11 or 14, 14 'are projected starting from that lateral edge of the heald inward thereof, of which the eye of the thread 4 is contiguously configured . Similar notches are provided respectively in the two other healds 22 and 19 in the area between the final eyelets and the main part, being in the case of the heddle 22 of the drafts 11"and 11" and in the case of the hedge 19, In other words, also these two heddles respectively have recesses in that lateral edge that extends adjacent to the respective eyelet of the thread 6. In this way the elastic configuration of these is again obtained. two healds 2 and 9 in the area between the final eyelet and the main part, Figures 5 to 8 show other types of healds, each time only showing one hem of the pair, as referring respectively to Figures 1 to 4 , we can renounce the reproduction of heddles 2 and 9, or 22 and 19, since these heddles are inherently undamaged even under high stresses All the heddles shown in Figures 5 to 8 have in common that, respectively in the area between the final eye and the main part, near the end eyelet, correspondingly have recesses, or, inwardly flexed cuts 12, 12 ', 13, 13', 15, 15 'and 16, 16 J which are introduced into the heddle starting from that lateral edge extending contiguously to the wire eyelet 4. The heddles 24, 25, 29 and 30 shown in Figures 5 to 8, to form the pair of heald meshes, can be combined respectively with. another heel 2 or 9, it being possible to use, of course, to form the pair also a heald mesh configured in another way, which coincides, for example, with the four heald meshes shown in Figures 5 to 8. It is essential to the invention that both heald meshes of the pair, in the area of the final buttonholes, or else, between the end eyelets and the main part of the heald, they are configured elastically, or, with softness of molding, to avoid damage in the case of high stresses. While the heald meshes shown in Figures 1 to 8 have final eyelets respectively open on one side, the final eyelets of the heald meshes shown in Figures 9 to 11 are closed. In the foregoing, Figure 9 shows a pair of heald meshes 32, 34, with respectively closed eyelets 36. Again, the yarn eyelets 4 'and 6' arranged in the center are displaced from each other. Contrary to the pair of heald meshes shown in Figure 1, or 2, in this case both heald meshes have a high elongation strength, so that with a high stress, both heald meshes are torn under tension. Correspondingly, both healds of the pair of healds must be configured modified in accordance with the invention, as shown, for example, in Figure 10. The two heald meshes 38 and 40 with the 4 'and 6' wire eyelets, by example, central, both have in the area near the end eyelets 36 respectively cut-outs or cuts flexed inwards 37, 37 'and 39, or 39', which project into the heddle starting from that lateral edge adjacent to which the corresponding wire eyelet 4 'or 6' is arranged. In this way, the elasticity required according to the invention between the end eyelets and the main part of the heald is again obtained. Finally, Figure 11 shows another embodiment of a heal 42 according to the invention, which has the recesses 43 and 43 '. It is possible to renounce the reproduction of the second lizo to form the pair, since by simple reflection of the lizo 42 the second lizo can be generated to form the pair. The recesses configured in Figures 3 to 8, or 10 and 11, respectively produce heddles that are considerably more elastic in the aforementioned area, which reduces the stresses in the material to a level that reliably prevents ruptures. The heddles that do not have the row perforation 17 shown especially in Figures 1 and 2, can present, according to the invention and with the same effect, a shape as shown in the heddles according to Figures 5 to 8, with the recesses 12, 13, 15 and 16, or else 12 ', 13', 15 'and 16'. The effect on the improvement of the elastic behavior of these heddles is the same, however, the formation is a little easier due to the different requirements for heddles. In the case of a heald which does not require the embossments 18, as shown, for example, in Figures 1 to 4, to be able to be processed in the collapsible machine, one may even choose a shape according to Figures 6 or 8, wherein the recesses 13, or 13 'and 16, or 16' provide the heddle with an ideal shape. Of course, the proposed form according to the invention can be transferred to any type of heald meshes to be arranged in pairs, that is to say, in accordance with the invention all the pairs of heald meshes are also included, which present, for example, deformations to keep the heddles at a distance from each other, with slightly twisted eyelets, which in the area of the final eyelets have crushes, or in which the final eyelets, for example through crushing, have a greater width than that of heald meshes, etc. In this regard, the present invention is also not limited to the examples shown in Figures 1 to 11, but in principle covers any type of healds to be arranged in pairs that is configured according to the invention.

Claims (7)

NOVELTY OF THE INVENTION Having described the foregoing invention, the content of the following is claimed as property: CLAIMS

1. Line hedges to be arranged in pairs, characterized in that in that lateral edge of the heald mesh, in the case of healds with open end eyelets, is projected on the opposite side to the open end eyelet, respectively near the final eyelets or in the zone thereof, a shape variation is configured.

2. Tarpaulin meshes to be arranged in pairs, characterized in that on that lateral edge of the heald meshes, which, in the case of healds with closed end eyelets, project respectively on the external side of a pair, correspondingly to the buttonholes or in the area of them is configured a form variation.

3. Tarpaulin meshes to be arranged in pairs, especially in accordance with any of claims 1 or 2, characterized in that the shape variation is a notch or a cut inwardly bent.

4. Heald meshes in particular according to any of claims 1 to 3, characterized in that the notch, or the cut inwardly bent, covers at least about 1/3 of the width of the heald mesh. Sheath meshes in particular according to any one of claims 1 to 4, characterized in that at least one of the two heald meshes, in the following region respectively the final eyelet in the direction of the yarn eyelet, has a recess, or well, a cut inwardly bent that is introduced in the heddle starting from that side edge that projects adjacent to the eyelet of the thread. 6. Heald meshes in particular according to any of claims 1 to 5, characterized in that at least one of the heald meshes, in the following zone respectively to the end eyelets in the direction of the yarn eyelet, presents a flexure. 7. Heald meshes in particular according to any of claims 1 to 6, characterized in that the two heald meshes, in the following zone respectively to the end eyelets in the direction of the yarn eyelet, are elastically configured.