FR2929623A1 - WEAVING PROCESS FOR MAKING A MAT AND CARPET OBTAINED BY SUCH A METHOD - Google Patents

Abstract

This weaving process for producing a double-piece carpet (100, 200) (T1) by means of a double-ply loom, in which: a) a backrest (108, 208) delimiting the sides (100I) is formed; and back (100E) and comprising: - tension son (104) extending in the warp direction (C-C '), - internal weft threads (112) inserted on the face (100I) side, and- primary bonding yarns (121, 122, 123; 221, 222, 223) binding the internal weft threads (112) to the back (108, 208); b) inserting, on the back side (100E), threads of external weft (111), c) embossing threads (103) are incorporated in the carpet (100, 200) so that they surround each or some of the outer weft threads (111), the embossed threads (103) forming bristles or loops on the face side (100I) of the carpet (100, 200), and so-called dead relief son (102); furthermore, secondary bonding yarns (C-C ') are incorporated into the chain (C-C') ( 131, 231), to bind to the file (108, 208) each weft thread e xterne (111) which is surrounded by relief son (103).

Description

WEAVING PROCESS FOR MAKING A MAT AND CARPET OBTAINED BY SUCH A METHOD

The present invention relates first of all to a weaving process for producing a double-piece carpet. The invention also relates to a carpet obtained by such a method and comprising primary bonding yarns and secondary bonding yarns. In the field of carpet weaving by a mechanized process, it may be desirable to provide a carpet having a hand-made carpet appearance. Such a handmade rug is characterized by a high density and a particular knotting of its son so that is found on the back side of the carpet pattern that is drawn on the front side of the carpet. EP-A-1 746 190 discloses a weaving method for obtaining a hand-made carpet and comprising: - a folder consisting of internal and external son of binding and weft son; - tension warp threads; and - embossed yarns, pile or loop, surrounding the outer weft threads, as well as so-called dead son son to become son embossed. In addition, the outer weft son that are surrounded by relief son are arranged on the back side of the carpet and outside its back. This arrangement gives the carpet a handmade appearance. However, a rug woven according to such a method has a relatively irregular, and sometimes a little loose, outer weft son son, because they are held only by relief son, which is poorly controlled tension. In addition, these outer weft yarns are relatively exposed to premature wear against the ground. The present invention aims to overcome these disadvantages, by proposing a weaving process and a carpet using secondary bonding son which binds to the file the outer weft son that are surrounded by son embossed.

For this purpose, the subject of the invention is a weaving method for producing a double-piece carpet by means of a double-ply loom, in which: a) a backrest is made delimiting the face side of the back side of the carpet and comprising: - tension son extending in the warp direction, - so-called internal weft son inserted on the face side of the carpet, and - primary binding son binding the inner weft son to the back; b) is inserted on the back side of the carpet, so-called external weft son; c) embossing embossed yarns so that they surround at least some of the outer weft yarns, the embossed pile yarns forming loops on the front side of the carpet, and so-called dead relief yarns; extending in the warp direction; the method being characterized in that secondary binding yarns are incorporated in the warp direction so as to bind to the backrest each outer weft yarn which is surrounded by embossed yarns. The steps of this process are performed substantially concomitantly. Furthermore, the subject of the invention is a carpet comprising: a backrest delimiting the face side of the back side of the carpet and comprising: tensioning threads extending in the warp direction, so-called internal weft threads inserted on the face side of the carpet, and - primary binding yarns linking the inner weft son to the backrest, d said outer weft son inserted on the back side of the carpet, and fils embossed son surrounding at least some of the weft son outer and forming hairs or loops on the face side of the carpet, and so-called dead warp threads extending in the warp direction, the carpet being characterized in that it further comprises secondary warp threads extending in the warp direction and binding to the backrest each outer weft yarn which is surrounded by embossed yarns. A carpet according to the invention has high mechanical strength and wear resistance as well as good hand-made appearance.

According to advantageous but optional features of the invention, taken separately or in any technically permissible combination: each of the outer weft yarns is surrounded by embossed yarns; the backrest furthermore comprises so-called median weft threads which are inserted on the back side between the primary binding threads and the dead pile threads. The primary binding threads bind the internal weft threads and the median weft and secondary binding yarns link the median weft and outer weft yarns to the file; the carpet comprises an outer weft yarn for a median weft yarn and for an internal weft yarn; - All outer and outer son of the middle frame son are connected, consecutively in the warp direction, by the same secondary bonding wire; two son of external frames consecutively linked by the same secondary binding yarn are separated by at least one outer weft yarn released from said secondary yarn; the mat comprises first and second secondary binding yarns, the first secondary binding yarns wrapping around the middle weft yarns and one out of two outer weft yarns, the second secondary binding yarns wrapping around median weft yarns and each outer weft yarn released from the first secondary yarns; the carpet comprises two outer weft threads for a median weft thread and for an internal weft thread; - All the son of frames are linked, consecutively in the warp direction, by the same secondary bonding wire; the secondary bonding yarns are of synthetic silk, for example of polyester; each secondary bonding yarn has a linear density of between 5 tex and 100 tex, preferably between 30 tex and 50 tex; two consecutive secondary bonding yarns in the weft direction are incorporated with intervals of 10 to 100 chain passes in the comb; and - two consecutive secondary bonding yarns in the weft direction are incorporated with variable chain-pass intervals in the comb depending on the width of the carpet considered parallel to the weft direction; and the carpet results from the separation, by means of at least one knife, of a double-piece carpet produced by a weaving process as explained above. The invention will be well understood and its advantages will also emerge in the light of the description which follows, given solely by way of nonlimiting example and with reference to the appended drawings in which: FIG. 1 is a section, in parallel in the warp direction, two mats according to a first embodiment of the invention, during their weaving according to a method according to the invention; - Figure 1a is a schematic representation of the carpet of Figure 1 illustrating insertion cycles implemented during its weaving; - Figure 2 is a section similar to Figure 1 of two mats according to a second embodiment of the invention; - Figure 3 is a section, parallel to the warp direction, of a carpet according to a third embodiment of the invention, after a weaving process according to the invention; Figure 4 is a rear view of a portion of the carpet of Figure 1 or Figure 2; - Figure 5 is a view similar to Figure 4 of a portion of the carpet of Figure 3; and FIG. 6 is a schematic representation of a lateral half-section, parallel to the weft direction, of a carpet according to the invention. FIG. 1 illustrates a double carpet T1, during its weaving according to a method according to the invention and by means of a not shown loom having two weft insertion levels. The double carpet T1 is composed of two pieces, namely an upper carpet 100 and a lower carpet 200. After their weaving, the upper carpet 100 and the lower carpet 200 are separated by means of a knife 12 and known manner in itself. The belt 100 has a back 108 which delimits the inner 1001 and outer 100E sides of the belt 100. The outer side 100E comprises the back of the belt 100, which is intended to be in contact with the ground or any other support. The inner side 1001 comprises the face of the belt 100, which is intended to be turned towards the room where the carpet 100 is arranged. The outer and inner sides respectively form the back sides 100E and 1001 of the carpet 100.

The backrest 108 includes threads of dead bristles 102, that is to say bristles that do not immediately form reliefs. The dead bristles 102 extend in the chain direction symbolized by the axis C-C '. The wires 102 are shown in Figure 1 schematically by the envelope of the volume in which they are arranged. The belt 100 further comprises drawing bristles 103 which extend generally in a direction ZZ 'perpendicular to the direction CC' and transverse to the general plane of the belt, so as to form bristles on the face side 1001. drawing bristles 103 determine the pattern formed on the face side 1001 of the carpet 100. The bristles 102 are intended to form embossed pattern bristles 103 on the face 1001, on other zones of the double Ti carpet as shown in Figure 1. In Figure 1, the thicknesses of drawing bristles 103 are shown between two dashes. Figure 1 shows reliefs formed by a single thread of drawing hair 103.

However, these reliefs may be formed by several son of successive or simultaneous hairs. Alternatively to the son 102 and 103, a carpet according to the invention may comprise other son embossed, such as loop son, dead loop son being intended to form buckles in relief on the front side of the carpet. The belt 100 further comprises so-called external weft threads 111, which are inserted on the outer side 100E, and so-called internal weft threads 112, which are inserted on the inner side 1001. In the example of FIG. outer weft 111 is surrounded by drawing bristles 103. The bristles 103 are wrapped exclusively around the outer weft threads 111, thereby forming fastening loops 114 which determine the pattern on the back sides 100E of the carpet Backrest 108 further includes tension son 104 extending in the chain direction CC 'and the side 100E. The tension son 104 contribute to the holding of the folder 108 by means of the tension they support. The folder 108 also includes so-called median weft threads 113 which are inserted between the tension threads 104 and the dead bristles 102. The weft threads 113 are referred to as medians because they are arranged generally between the outer weft threads 111 and the inner weft threads 112. Moreover, since they are inserted between the tension threads 104 and the threads 102, the medial weft threads 113 are located in a medial region of the backrest 108. The carpet 100 includes a external weft 111 for a median weft yarn 113 and for an internal weft yarn 112. The belt 100 thus has a relatively dense structure. In the example of FIGS. 1 and 2, the tensioning threads 104 are arranged between the outer weft threads 111 and the middle thread threads 113, so that they are isolated from the dead threads 102. This makes it possible to mask the dead bristles 102 which are intended to form drawing bristles 103 and which therefore have hues liable to degrade the hand-made appearance, if they were exposed on the back side 100E. However, in a variant not shown, the tension son can be arranged between the median weft son and the internal weft son, so in contact with the son of dead hairs 102.

The backrest 108 further comprises primary binding yarns 121, 122 and 123, whose function is to bind back 108 the inner weft threads 112 and the middle weft threads 113. In the case of the backrest 108, each of the threads primary binding means 121, 122 and 123 binds to the backrest 108 one internal weft thread 112 out of three and one middle weft thread 113 out of three. In other words, three internal weft threads 112 and three median weft threads 113 consecutive in the chain direction C-C 'are linked to the back 118 respectively by separate primary tie wires 121, 122, and 123. The primary binding yarns 121, 122 and 123 thus follow a repetition type armor equal to 9. In the weft direction T-T ', visible in FIGS. 4 to 6, the primary binding yarns 121, 122 and 123 can be distributed in the width of the carpet 100 every 1 to 3 passages of chain in the comb of the loom. Advantageously, the primary bonding yarns 121, 122 and 123 may be distributed in three chain passes in the consecutive comb in the weft direction TT '. The folder 108 further comprises secondary bonding threads, one of which is visible in Figure 1 with the reference 131. The secondary bonding wire 131 extends in the chain direction CC 'and binds to the folder 108 the outer weft son 111. In this case, the secondary binding yarn 131 binds in the folder 108, consecutively in the chain direction C-C ', each median weft yarn 113 and each outer weft yarn 111, therefore each outer weft yarn 111 which is surrounded by drawing pile yarns 103. Description carpet 100 given above in connection with Figure 1 can be directly transposed to the carpet 200 which is similar. Elements of the belt 200 which are identical or corresponding to those of the belt 100 bear the same numerical references increased by 100. Thus, the dead pile yarns 202, the backrest 208, the backside 200E, the front side 2001, the tensioning wires are defined. 204, the outer weft yarns 211, the inner weft yarns 212, the middle weft yarns 213, the fastener loops 214, the primary bond yarns 221, 222 and 223 and the secondary bond yarn 231. The double mat Ti is woven on a double-ply loom having two insertion planes in which two weft threads are simultaneously inserted at each cycle.

As shown in Fig. 1a, during a first insertion cycle, an outer weft thread 111 is inserted into the insertion plane corresponding to the carpet 100, while a middle weft thread 213 is simultaneously inserted. in the shed plane corresponding to the mat 200. At the next cycle, a median weft yarn 113 and an outer weft yarn 211 are simultaneously inserted. In a third cycle, two internal frame wires 112 and 212 are inserted. Thus, three insertion cycles are required for a pile yarn 103 to wrap around an outer weft thread 111 of the belt 100 by forming a fastening loop 114 and then around an outer weft yarn 211 of the belt 200 forming a fastening loop 214, before returning to form a fastening loop on the belt 100 around the outer weft thread in the chain direction C-C '. The carpet 200 is distinguished from the carpet 100 by the relative positions of the external weft yarns 211, internal 212 and median yarns 213. In fact, in the carpet 100, the internal weft threads 112 are opposite the outer weft threads 111, while in the belt 200, the internal weft yarns 212 are opposite the middle weft yarns 113, i.e. they occupy a staggered position relative to the outer weft yarns 211.

FIG. 2 illustrates a double piece mat T2 according to a second embodiment of the invention, for which elements similar to those of FIG. 1 bear identical reference numerals. The double piece carpet T2 is formed of an upper carpet 300 and a lower carpet 400 woven according to a method according to the invention. The carpet 300 comprises a backrest 308, which comprises threads similar to those of the backs 108 and 208. The carpet 300 thus comprises dead pile threads 102, tension threads 104, external weft threads 111, weft threads In addition, the carpet 300 comprises a secondary binding yarn 331 which substantially fulfills the same function as the secondary binding yarn 131 for the carpet 100. The carpet 300 is distinguished from the carpets 100 and 200 by the relative position of the weft son 111, 112 and 113, and by the path followed by the secondary binding yarn 331. The belt 300 thus comprises two outer weft threads 111 for an inner weft thread 112 and for one medial weft yarn 113. The outer weft yarns 111, the inner weft yarns 112, and the middle weft yarns 113 are offset from one another in the C-C 'chain direction. In other words, the internal frame wires 112 are staggered relative to the outer weft threads 111 or to the middle weft threads 113. Unlike the carpet 100, all the weft threads 111, 112, and 113 of carpet 300 are bonded, consecutively on the chain direction C-C ', by the same secondary bonding wire 331, which follows a linen-type armor. Thus, unlike the back 108, the back 308 is traversed right through by the secondary binding thread 331. On the other hand, the back 308 comprises only two types of primary binding yarns 121 and 122, which each bind to the backrest 308 an inner weft thread 112 on two and a median weft thread 113 on two. The primary binding yarns 121 and 122 follow a repetition type armor equal to 8.

The carpet 400 has a structure identical to that of the carpet 300. As the carpets 300 and 400 have fewer weft threads and fewer primary binding threads, they have a density lower than the density of the carpet 100 or 200. Thus, for identical linear masses and thread tensions, the carpet 300 or 400 is lighter than the carpet 100 or 200. The double carpet T2 is woven on a double-ply loom having two insertion planes in which two weft son are simultaneously inserted at each cycle. Two insertion cycles are required for a pile yarn 103 to wrap around an outer weft thread 111 of the carpet 300 forming a fastening loop 114, and then around an outer weft yarn 211 of the carpet 400 forming a fastening loop 214. Figure 3 illustrates a carpet 500 according to a third embodiment of the invention. The carpet 500 comprises a back 508 and drawing pile son 103. In the folder 508, the son identical to the son of the folders 108 to 408 have identical reference numerals. The carpet 500 thus comprises dead pile threads 102, tension threads 104, external weft threads 111, internal frame threads 112, medial weft threads 113 and primary bond threads 121, 122 and 123.

The carpet 500 is shown in the individualized state, that is to say separated from the double-piece carpet obtained by a weaving method according to the invention. In the belt 500, the outer weft yarns 111, the internal weft yarns 112 and the medial weft yarns 113 are arranged relative to the tension yarns 104 and relative to one another in the same manner as in the carpet. Thus, the outer weft yarns 111 are facing the inner weft yarns 112 and staggered from the middle weft yarns 113. The mat 500 comprises an outer weft yarn 111 for a median weft yarn 113 and for an internal weft thread 112. The primary binding yarns 121, 122 and 123 follow the same weave and the same path in the file 508 as in the file 108. The carpet 500 is further distinguished from the carpet 100 in that it comprises two secondary binding yarns 531 and 532, which respectively wind around the outer weft yarns 111 and the middle weft yarns 113. The weave of the secondary binding yarns 531 and 532 is such that two outer weft yarns 111 consecutively linked by u n secondary binding yarn 531 or 532 are separated by at least one external weft yarn released from this secondary binding yarn 531 or 532. By disengaged means a weft yarn which is not surrounded by a binding yarn and which has no contact with this one.

In other words, the secondary bonding yarns 531 and 532 respectively have portions 533 and 534 that float on and between two medial weft yarns 113 without surrounding the outer weft yarn 111 located between these two middle weft yarns 113 and between two external weft threads 111 consecutively bonded by the secondary binding yarn 531 or 532. According to a variant not shown, secondary binding yarns can be inserted in only one of the mats 100 or 200, for example in the lower belt 200 but not in the upper belt 100. In all the embodiments described above, it is desirable to use fine son but with high mechanical strength to minimize the visibility of secondary bonding son 131, 231, 331, 431 , 531 or 532 on the back side 100E of the belt 100, 200, 300, 400 or 500. For example, son of synthetic silk, for example polyester, having a linear density of between five, can be used. tex and one hundred tex, preferably between thirty tex and fifty tex.

Thus, the son of drawing hairs 103, which are thicker, are able to almost completely mask the secondary binding yarns 131, 231, 331, 431, 531 and / or 532. The design appearing on the 100E back side is therefore exclusively determined by the loops 114 and 214 of the pattern bristles 103 around the outer weft wires 111 and 211.

In addition, it is possible to further reduce their visibility by using secondary bonding yarns whose hue is close to the hue of the outer weft yarns. A carpet according to the invention thus has a hand-made appearance, because the drawing pile son reproduce on the back side of the carpet drawing appearing on the side and because secondary binding son are almost invisible on the back side of the carpet. In addition, the presence of tensioning threads 104 and the back connections of the outer weft threads 111 by the secondary binding yarns 131, 231, 331, 431, 531 or 532 give the back of such a carpet stability and stability. mechanical strength superior to those of the carpets of the prior art. To further reduce the visibility, on the back side 100E, secondary binding son 131, 231, 331, 431, 531 or 532, it is possible to optimize their distribution in the width of the belt 100, 200, 300, 400 or 500, depending on the desired yarn consumption, carpet density, stability and strength. In practice, two secondary binding yarns 131, 231, 331, 431, 531 or 532, consecutive in the T-T 'weft direction, can be incorporated every 10 to 100 chain passes in the comb. This advantageously makes it possible to reduce the consumption of secondary bonding yarns. In other words, two secondary binding yarns 131, 231, 331, 431, 531 and / or 532 are separated by an interval representing between 10 and 100 teeth of a loom comb. In the example of Figure 4, corresponding to a portion of the belt 100, the L1 interval is twelve comb teeth, that is to say there are twelve son of bristles 103 between two son binding consecutive 131 consecutive in the frame direction T-T '. Similarly, in the example of Figure 5, corresponding to a portion of the belt 500, the gap L1 separating two son of secondary bonds 531 or 532 consecutive in the direction of the T-T 'frames is twelve comb teeth.

However, the secondary bonding yarns 531 are staggered or staggered relative to the secondary bonding yarns 532, which decreases their visibility. In this case, the offset between two neighboring son 531 and 532 is six comb teeth. Moreover, the interval separating two secondary binding yarns 131 or the like can vary in the weft direction TT 'and according to the distance in the middle M of the carpet 100. This makes it possible to reinforce the mechanical strength and the stability of the carpet 100 in the median regions close to the middle M compared to the peripheral regions that are further away. Such a structure makes it possible to optimize the consumption of secondary binding yarns 131 with respect to the mechanical strength that the carpet must present at its median and peripheral regions. Thus, as shown in FIG. 6, the median region of the belt 100 may have a gap L1 of twelve comb teeth, which is about 20 mm to 40 mm. Then, at a quarter of the width L of the belt 100, the secondary binding yarns 131 are separated by a gap L2 of about twenty-four teeth, which is between 40 mm and 80 mm. Finally, at the edges of the carpet, two secondary bonding yarns 131 consecutive can be separated by an interval of about fifty comb teeth, 80 mm to 160 mm.

The present invention therefore makes it possible to produce a carpet with optimized and high mechanical strength and resistance to wear as well as a good hand-made appearance.

Claims (15)

REVENDICATIONS1. Weaving process for producing a double-piece carpet (100, 200, 300, 400, 500) (Ti, T2) by means of a double-ply loom, in which: a) a folder (108, 208; 308, 408, 508) delimiting the face side (1001) of the back side (100E) of the belt (100, 200; 300, 400; 500) and comprising: - tension wires (104) extending in the direction of chain (C-C '), - said internal weft threads (112) inserted on the face side (1001) of the carpet (100, 200; 300, 400; 500), and - primary binding yarns (121, 122 123, 221, 222, 223) binding the internal weft threads (112) to the back (108, 208; 308, 408; 508); b) inserting, on the back side (100E) of the carpet (100, 200, 300, 400, 500), so-called external weft yarns (111); c) the carpet (100, 200, 300, 400, 500) is embossed with embossed threads (103) so that they surround at least some of the outer weft threads (111), the embossed threads (103) forming bristles or loops on the face side (1001) of the carpet (100, 200; 300, 400; 500), and so-called dead relief son (102) extending in the warp direction (C-C ') ; the method being characterized in that secondary warp threads (131, 231, 331, 431, 531, 532) are incorporated in the warp direction (C-C ') so as to bind to the file (108, 208). 308, 408; 508) each outer weft thread (111) which is surrounded by raised threads (103). 2. Carpet (100, 200; 300, 400; 500) comprising: a backrest (108, 208; 308, 408; 508) delimiting the face side (1001) of the back side (100E) of the carpet (100, 200; 300, 400; 500) and comprising: - tension son (104) extending in the warp direction (C-C '), - said internal weft threads (112) inserted on the face (1001) side of the carpet (100, 200, 300, 400, 500), and primary binding yarns (121, 122, 123, 221, 222, 223) binding the inner weft threads (112) to the back (108, 208; 408; 508), said outer weft threads (111) inserted on the back side (100E) of the carpet (100, 200, 300, 400; 500), and embossed threads (103) surrounding at least some outer weft threads (111) forming hairs or loops on the face side (1001) of the carpet (100, 200; 300, 400; 500), and so-called dead relief threads (102) extending into the chain direction (C-C '); the belt (100, 200; 300, 400; 500) being characterized in that it further comprises secondary binding yarns (131, 231; 331, 431; 531, 532) extending in the direction of chain (C-C ') and binding to the backrest (108, 208; 308, 408; 508) each outer weft thread (111) which is surrounded by embossed threads (103). Carpet (100, 200, 300, 400, 500) according to claim 2, characterized in that each of the outer weft threads (111) is surrounded by raised threads (103). 4. Carpet (100, 200, 300, 400, 500) according to one of claims 2 to 3, characterized in that the backrest (108, 208; 308, 408; 508) further comprises weft threads. said medians (113) which are inserted on the back side (100E) between the primary binding yarns (121, 122, 123, 221, 222, 223) and the dead pile yarns (102), in that the binding yarns primary members (121, 122, 123, 221, 222, 223) connect the internal weft threads (112) and medial weft threads (113) to the backrest (108, 208, 308, 408, 508) and that the secondary binding yarns (131, 231, 331, 431, 531, 532) bind the medial weft threads (113) and the outer weft threads (111) to the backsheet (108, 208, 308, 408, 508). Carpet (100, 200, 500) according to claim 4, characterized in that it comprises an outer weft thread (111) for a median weft thread (113) and for an internal weft thread (112). Carpet (100, 200) according to claim 5, characterized in that all the outer field wires (111) and all the medial field wires (113) are connected consecutively in the chain direction (C -C '). ), by the same secondary bonding wire (131, 231). Carpet (500) according to claim 5, characterized in that two outer weft yarns (111) consecutively linked by the same secondary binding yarn (531 or 532) are separated by at least one outer weft yarn (111). released from said secondary binding yarn (531 or 532). 8. Carpet (500) according to claims 4 and 5, characterized in that it comprises first (531) and second (532) secondary bonding son, the first secondary bonding son (531) wrapping around the median weft yarns (113) and one outer weft yarn (111) out of two, the second secondary binder yarns (532) wrapping around the middle weft yarns (113) and each outer weft yarn ( 111) released from the first secondary binding yarns (531). Carpet (300, 400) according to claim 4, characterized in that it comprises two outer weft threads (111) for a median weft thread (113) and for an internal weft thread (112). Carpet (300, 400) according to claim 9, characterized in that all the frame wires (111, 112, 113) are connected, consecutively in the chain direction (C-C '), by a single wire of secondary binding (331, 431). Carpet (100, 200, 300, 400, 500) according to one of Claims 2 to 10, characterized in that the secondary binding yarns (131, 231, 331, 431, 531, 532) are made of synthetic silk. for example polyester. Carpet (100, 200, 300, 400, 500) according to one of Claims 2 to 11, characterized in that each secondary bonding wire (131, 231, 331, 431, 531, 532) has a linear density. between 5 tex and 100 tex, preferably between 30 tex and 50 tex. 13. Carpet (100, 200, 300, 400, 500) according to one of claims 2 to 12, characterized in that two consecutive secondary binding yarns (131, 231, 331, 431, 531, 532) in the direction weft (T-T ') are incorporated with intervals (L1, L2, L3) of 10 to 100 chain passes in the comb. Carpet (100, 200, 300, 400, 500) according to claim 13, characterized in that two consecutive secondary yarns (131, 231, 331, 431, 531, 532) in the weft direction (T- T ') are incorporated with intervals (L1, L2, L3) of chain passes in the comb variable according to the width (L) of the carpet considered parallel to the frame direction (T-T'). Carpet (100, 200, 300, 400, 500) according to one of Claims 2 to 14, characterized in that the separation, by means of at least one knife (12), of a carpet (100, 200; 300; 400; 500) double piece (Ti, T2) made by a weaving method according to claim 1.