FR2509759A1 - Embroidery yarn - has non-metal core twice spirally wrapped with metal yarn followed by oppositely-wrapped cover yarn - Google Patents

Abstract

Specifically the composite embroidery yarn (10) is made from a feed yarn (14) of single-ply form, and comprising a non-metal core oppositely wrapped first with a metallic yarn and then with a non-metal cover yarn. A second metallic yarn (40) and a second cover yarn (56) are oppositely-wrapped in sequence about the feed yarn (14). Pref. the cover and core yarns are of the same synthetic material, and so are the metallic yarns. Loops of the metallic yarns are not badly flattened, as occurs when two feed yarns are plied, and the single-ply twice-wrapped yarn is cheaper than plied yarn.

Description

 The present invention relates to decorative textured yarns of the type described in United States Patent No. 3,382,655. These decorative yarns have been very successful in the textile industry, particularly for the formation of fabrics. Textured yarns produced by the process described in the aforementioned patent are characterized by a core consisting of a non-metallic thread around which a metallic bonding wire is wound helically in a first direction, then around which a non-metallic bonding wire is wound. helically in the opposite direction to block the first tying yarn. Thus, the first tying yarn typically forms a number of decorative turns radially oriented with a metallic strand, which gives these textured yarns a coarse texture , 'hairy but shiny.

 Unlike fabrics, threads with a relatively large linear mass are necessary for embroidery, hand weaving, sewing, etc. To produce such yarns with a large linear mass which have a textured effect advantageous for many applications, it has become common to double two or more of two distinct textured yarns. If two of the textured threads produced by the process described in the aforementioned patent were assembled, a textured thread of large linear mass would be obtained comprising six strands or separate ends, that is to say four strands of the thread forming the core and non-metallic tying wire and two strands of metallic tying wire. Although they are certainly satisfactory for most applications, such multiple and assembled textured yarns, however, tend to flatten oriented metal turns or loops. laterally individual textured yarns which impart shine and coarse and hairy texture to the yarns, so that the resulting doubled yarn is unacceptable in some cases.

 Consequently, the subject of the present invention is an unlined textured composite yarn, so as to avoid the annoying flattening effect mentioned above, which makes it possible to preserve the entire textured effect with yarns having a higher linear density. for use in embroidery, sewing, hand weaving, etc.

 Another object of the invention is to produce the composite and textured yarn from a smaller number of individual strands and consequently to obtain a less expensive product which nevertheless retains the desired decorative characteristics.

 Furthermore, the present invention relates to a new method for producing a textured composite yarn which makes it possible to omit one of the stages of the commonly used method, in which two or more individual textured yarns are assembled.

 According to the essential characteristics of the invention, an individual textured thread of the type comprising a non-metallic thread forming the core is advanced, around which a metallic thread is initially helically wound in a first direction, then around which a non-metallic binding thread. is helically wound in a second direction or in the opposite direction, on a generally longitudinal path to a first wrapping station, a wire is helically wrapped around said textured wire in a first direction at the first station, then the textured wire is directed towards a second wrapping station located longitudinally at a distance downstream from the first station, a non-metallic binding wire is helically wound around the textured wire in the second direction and the composite textured wire thus produced is then wound up.

 The invention will be described in more detail with reference to the attached drawing by way of nonlimiting example and in which the single figure is a side elevation in fairly schematic form of the apparatus used to make the decorative textured composite yarn of the present invention.

 We will now refer to the single figure of the drawing which illustrates the apparatus and the process by which the new unlined composite decorative textured yarn 10 of the present invention is produced. This figure represents a single station in a spinning loom 12 with multiple stations, of modified construction, in which the decorative composite yarn of the present invention can be produced by progressively progressing from bottom to top. A reserve of an individual textured thread 14 wound on a bobbin 16 so as to form a bobbin 18 is supported to rotate freely on a support 20. This single textured thread 14 comprises a non-metallic thread constituting the core, around which a thread metal is wound in a first direction, and subsequently around which a non-metallic binding wire is wound in a second direction of rotation. The resulting structure of such an individual textured wire as well as the embodiment and the apparatus are described in U.S. Patent No. 3,382,655 cited above, the description of which is given by way of reference in this specification.

 Such a textured thread 14 can be characterized by the fact that it has a texture of coarse and hairy appearance produced mainly by the presence of several turns spaced longitudinally and radially oriented of the decorative metallic thread wound around its core and held in place by the tying wire wound helically. In principle, the present process uses such a textured yarn as the core forming yarn in a wrapping process as described in the aforementioned patent. Thus, instead of conventionally assembling two or more of two individual textured yarns 14 products according to the method described in the aforementioned patent to form a textured composite yarn of large linear mass which is suitable for embroidery, hand weaving, sewing, etc. and which, inconveniently, undergoes a certain flattening of the turns of the metallic threads of these respective individual textured threads, the present method gives a composite textured thread 10 which largely retains the luster and the decorative bouffant. The present method achieves this result, not only by removing one of the non-metallic core wires present in the composite lined structure of the aforementioned prior art, but also eliminating the process of. doubling of the prior art described above. Consequently, a winding reel 24 is initially furnished with a single textured thread which passes through first and second wrapping stations 26 and 28 respectively, so that the only textured thread 14 moves from bottom to top of a bobbin 16 through a guide eyelet 30 connected to a support 32, and from there on a star wheel 34 rotating on a horizontal shaft 36.

Several bobbins 24, one of which is reserved for each winding station, are mounted on a common shaft 23.

 The single textured wire 14 moving from bottom to top is then surrounded by a metal wire 40 supported by a bobbin 42, which is itself mounted on a tubular spindle 44 intended to be rotated about its vertical axis by a belt 46 associated with a drive pulley 48 secured to the spindle 44. The metal wire 40 is unwound freely from the rotating bobbin 42 so as to form a balloon as seen in the single figure and therefore it is wound helically around of the single textured wire 14 moving from bottom to top, so as to form a series of turns 50 spaced apart longitudinally and oriented laterally, as explained above for the formation of the single textured wire 14.The metal wire is of a conventional type from 0.254 to 0.8 mm and generally consists of a cable or ribbon of synthetic resin fibers which has been covered with a metallic coating by methods known in the art.

 The single textured wire 14 around which the metal wire 40 is helically wound then passes from bottom to top in the second wrapping station 28 where it is directed into a second rotary spindle 52 on which a bobbin 54 is mounted. This bobbin 54 supports a reserve of tying thread 56 which can consist of a monofilament or multifilament synthetic thread, for example of rayon, of "nylon" of polyester, etc. and may preferably have a titer of around 70 to 300 denier. The tying thread 56 passes from the rotating bobbin 54 through a fin 58 of conventional construction and from there is wound helically in a second direction opposite to the first around the textured thread partially completed as it moves from bottom up in the device 12. The fin 58 tightens the binding or blocking thread 56 and thus prevents loosening of the loops or turns 50 formed when the thread 40 forms the balloon around the textured thread 14. A belt 60 passes around a driving pulley 62 integral with the spindle 52. Thus, the binding wire 56 can block the metal wire 40 on the single textured wire 14. The resulting textured wire 10 then rises, passing around a star wheel 64, towards the winding reel 24 which is itself intended to rotate around the shaft 23 which is common to several winding stations 22 normally provided.

 Consequently, it is obvious that the second metal wire 40, as well as the binding wire 56 subsequently applied to the resulting wire 10, partially provide the desired decorative effect without flattening the metal turns 50 already present on the single textured wire 14 This is distinguished from the significant flattening of the individual loops or turns, when two or more of two distinct textured threads are doubled according to the process currently used to produce the puffy textured threads of large linear mass which it is desirable to use in embroidery, hand weaving, sewing, etc.

 The present method, as indicated above, also has the advantage of significantly reducing the degree of wire handling normally required in the prior art method of assembling multiple wires. In this regard, it should be noted that in this assembly process, it is common to wind the single textured yarn 14 after its formation by the process described in the aforementioned patent, from the normal take-up reel onto a separate reel to be used in the assembly process. In the present process, a single rewinding or rewinding step is sufficient, namely that which consists in passing the single textured yarn from its normal take-up reel to the feed reel 16. A significant reduction is also obtained. the operating time of the machine, since the separate assembly operation is eliminated, that is to say that, in this assembly process of the prior art, two separate passes in the machine or a single pass of double duration is necessary to produce the single textured yarns necessary for the assembly process, while, in the present method, two passes in the loom 12 shown make it possible to achieve the desired result.

Claims (6)

 1. A method of producing a textured composite yarn of relatively large linear mass suitable for embroidery, sewing, etc., a method characterized in that it consists in advancing a single textured yarn of the type having a core consisting of a metal wire around which a metal wire is initially helically wound in a first direction, then around which a non-metallic binding wire is helically wound in a second opposite direction, on a generally longitudinal path to a first wrapping station; helically wrapping a metal wire around the textured wire in the first direction at the first station; then directing the textured yarn to a second wrapping station distant longitudinally downstream of the first station; helically wrapping a non-metallic binding wire around the textured wire in the second direction; and then winding the unassembled composite textured yarn thus produced.  2. Method according to claim 1, characterized in that the two metal wires and the binding wires are single wires.  3. Method according to claim 2, characterized in that both the non-metallic threads and the binding threads are made of synthetic resin fibers.  4. Unlined, decorative composite textured yarn of relatively large linear mass, suitable for embroidery, sewing, etc. 7 characterized in that it comprises a core consisting of a composite thread (14) comprising a non-metallic thread around which a first metallic thread is wound helically in a first direction and on which a non-metallic binding thread is wound helically in a second opposite direction, said composite wire (14) forming a core having a second metal wire (40) helically wound on it in a direction of rotation and a second non-metallic binding wire (56) helically wound on the latter in a second direction opposite to said direction of rotation.  5. composite textured yarn according to claim 4, characterized in that the first direction and the direction of rotation cited in the first place are identical.  6. composite textured yarn according to claim 5, characterized in that the core yarn and the binding son are made of the same material and in that the metallic son consist of the same metal.