FR2516948A1 - Sepn. of broad cloths into tapes, etc. - by cold-cutting along sealed zones incorporating pre-fused fusible yarns - Google Patents

Abstract

In the mfr. of textile articles, partic. tapes and ribbons, which are woven or knitted in broadcloth form and subsequently cut along pre-defined zones to form separate articles, the cutting operation is facilitated by incorporation in the cutting zones several fusible yarns alternating with the standard, non-fusible yarns in the warp, or weft, or both. The fusible yarns are fused together either during a normal finishing operation, such as drying, or in a special heating operation, which may be executed in the loom as weaving is proceeding. The cloth is then divided into separate articles by a rapid, cold-cutting operation. This improves the speed and efficiency of the cutting operation, and gives clean, high-quality edges to the articles which will not fray, and allow the articles to be sewn securely by the edges without further finishing.

Description

 The subject of the invention is a process for manufacturing and cold separation of textile articles woven simultaneously, and the products obtained by the implementation of this process.

 The object of the invention relates to the technical sector of the manufacture of textile articles, in particular ribbons or bands.

 It is known on the one hand that we weave or knit simultaneously on textile manufacturing looms, in order to have good productivity, a certain number of articles, for example bands or ribbons woven together, which we must then separate so that each item is independent and can be used as it suits. On the other hand, one must frequently be able to fix the edges of these articles by seams, in a solid manner, without risking the fraying and the separation of the article.

 These conditions are for example those which one meets in the manufacture, in the separation, then in the fixing of the strips of Velcro fabrics which present in a good way.

known per se, hooks or hooking heads and / or hooking loops.

 We wanted according to the invention, and better than in the past, rationation and make more economical the manufacture of these articles or ribbons by obtaining selvedges which allow a robust fixing by solid seams.

 For this, the method of the invention is remarkable in that one incorporates during the weaving of the selvedges of the articles in which the cutting must take place in order to separate the articles, a few heat-fusible wires mixed with the usual non-fusible wires of the weaving, one causes the simultaneous fusion on all the selvedges of the hot-melt threads by application of a thermal effect; fast cold cutting is carried out in the contiguous edges of the articles in order to separate them.

 These characteristics and others will emerge from the following description.

To fix the object of the invention, without however limiting it, in the attached drawing
FIG. 1 is a plan view of textile articles woven simultaneously into strips with incorporation in the contiguous selvedges and at the edge, of hot-melt threads.

 Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.

 Figure 3 is, on a large scale, a partial cross-sectional view showing the incorporation of hot-melt wires in the contiguous selvedges and at the edge, and before melting said hot-melt wires.

 Figure 4 is a view similar to Figure 3 after melting the hot melt wires.

 Figure 5 a view corresponding to Figure 4 after cutting, in the adjoining selvedges, then fixing -de the cut article- on any support.

 Figure 6 ex an auction view of a textile article cut and executed according to an alternative embodiment.

 In order to make the object of the invention more concrete, it will now be described in a nonlimiting manner with reference to the exemplary embodiment of the drawing figures.

 FIG. 1 shows textile articles woven together in the form of bands (B). The invention finds a particularly advantageous, although not limltative, application for the ban of self-gripping fabrics which have, in a manner known per se, hooks or all of hooking and / or hooking loops. We can consider that there are figured in (who) the hooks, or heads or loops.

 According to the method of the invention, there are incorporated, during the weaving of articles (B), in the selvedges at the edge (L) and in the contiguous selvedges CLI), a few hot-melt threads (FT3 mixed with the usual non-fusible threads ( F) of the weaving (FIG. 3). In the example illustrated, there are, in a way which is in no way limiting, three hot-melt threads (FT).

 We then cause, the simultaneous fusion on all the ltsières (L and L1), of the hot melt wires (FT) which will thus bind the close wires in spun and weft by forming selvages that are both flexible and very resistant without risk fraying, as illustrated in Figures 4 and 5.

 The fusion of the hot-melt wires takes place by application of any thermal effect at the suitable temperature, by any known and appropriate means, in order to obtain the result in an advantageous and particularly targeted manner, the heating effect developed during drying is used. at the end of a dye treatment known ez se and that we briefly recall.

 After weaving the bands (B), the latter pass through dye baths and are subjected to a spraying in order to fix the colors in particular. Continuously, there is also a ready ap and drying, the effect of this drying operation by infrared, heating cylinder, hot air, etc., being advantageously applied to ensure the fusion of the hot melt wires (FT).

 But it is obvious that in the case where the articles in strips are not necessarily subjected to a dyeing treatment, the thermal effect causing the melting of the hot-melt wires, takes place on the loom by all appropriate and known means. .

 There may for example be several independent heating elements or a single heating plate, mounted on the loom after weaving, to act in particular above the selvedges in order to melt the hot melt wires.

 It can therefore be seen that the selvedges (L and ti) of each bordeauxi then executed and then treated, make it possible to carry out, in a safe and rapid manner, the cold cut in the contiguous selvedges (L1) of the articles (B), to separate them (Figure 5).

 The selvedges thus executed and treated according to the process are both flexible and very resistant to the forces exerted on the assembly seams (P) of the textile article (B) fixed on any support (S) ( figure 5). there is no risk of unwinding both after cutting and during sewing, or subsequently under multiple efforts.

It is emphasized that, in a manner comparable to the selvedges (L and
L1) with the incorporation of hot-melt threads woven in chaste, hot-melt threads incorporated into selvedges could also be woven in a weft, depending on the shape, the specificity of the desired article after cold cutting. In this case, we would obtain an article with selvedges (L2) as defined, over its entire periphery (Figure 5).

 It is obvious that the process of the invention applies to all textile articles, synthetic or not, woven or knitted together, in particular in strips.

 The advantages are apparent from the description, in particular it emphasizes - The quality of the article obtained.

- The speed of the cold B cut.

- The quality of the seams by the resistance of the cut edges - The economy in the production of articles.

 The invention is in no way limited to that of its modes of application any more than to those of the embodiments of its various parts which have been more particularly indicated; on the contrary, it embraces all its variants.

Claims (3)

-1- Process for manufacturing and separating textile articles woven simultaneously, and the products obtained by implementing the process which is characterized in that, when weaving the selvedges (L1), articles are incorporated (B) in which the cutting must take place in order to separate the articles (B), a few threads; FT) hot-melt mixed with the usual threads (F) non-fusible in weaving, the simultaneous fusion is caused on all the edges of the threads hot-melt by application of a thermal effect if fast cold cutting is carried out in the contiguous selvedges (L1) of the articles in order to separate them. -2- A method according to claim 1, characterized in that, for melting the hot melt son, using the heating effect developed during drying at the end of a dyeing treatment. -3- The method of claim 2, characterized in that after weaving, the articles (B) are passed through dye baths and subjected to a spray; an apprenticeship and drying is carried out continuously, in particular by infrared, heating cylinder, hot air, etc., to ensure the fusion of the hot-melt wires (FT) -4- Preced according to claim 1 and any one of claims 2 and 3, characterized in that some hot-melt threads are incorporated during the weaving of the selvedge edges (L) and the contiguous selvedges (L1). -5- Method according to any one of claims I to 4, characterized in that lton weaves the selvedges (L) and (L13 in chain -6- Method according to any one of claims 1 to 4, characterized in what we weave the selvedges (L and L1) in edges and in weft.  -7- Products obtained according to any one of claims 2, 2, 3, 4 and 5. -8- Products obtained according to any one of claims 1, 2, 3, 4 and 6.