Machine and method for making a yarn comprising decorative elements

Description

Technical field of the invention

[0001] The present invention relates to a machine and a method for making a yarn comprising decorative elements, such as, for example, beads or sequins.Prior art

[0002] Making yarns comprising at least one textile thread and a plurality of decorative elements coupled to the textile thread in a (more or less closely) distributed manner along the longitudinal development of the textile thread is known. The decorative elements typically comprise a through hole in which the textile thread is made to pass in order to achieve the reciprocal coupling.

[0003] Such yarns are typically employed in the manufacture of fabrics, for example for making evening gowns.

[0004] The present invention fits into the context of the making of the aforesaid yarn.

[0005] Documents US3089443A, WO2006134634A1 and JPH03103288A describe decorative elements feeders.Summary of the invention

[0006] "Substantially horizontal / vertical" in relation to an element of the machine means that such an element forms an angle of 0°+ / -15° with the horizontal / vertical direction, preferably 0°+ / -10°.

[0007] In the aforesaid context, the Applicant has set forth the following considerations.

[0008] Firstly, the Applicant believes that it is necessary for the yarn produced to have high levels of quality both in aesthetic and / or tactile terms, for example as regards the integrity of the decorative elements coupled to the textile threads (which must not be damaged in any manner by the yarn-making process), and in terms of robustness, for example by ensuring a stable and lasting coupling of the decorative elements with the at least one textile thread.

[0009] Furthermore, the Applicant believes it advantageous to be able to make such yarn in a simple, fast, and economical manner, for example as regards the feeding of the decorative elements to the devices for coupling to the textile thread. For example, since the decorative elements used are typically in very large number and have small dimensions, a manual positioning thereof is not suitable in an industrial setting. On the other hand, an automatic positioning of the decorative elements must be carried out in a precise manner, such as to avoid any damage to the decorative elements themselves.

[0010] The Applicant has thus addressed the problem of making a yarn comprising decorative elements in an industrially effective and / or rapid and / or economical manner, while at the same time ensuring the desired qualitative attributes of the yarn obtained.

[0011] According to the Applicant, the aforesaid problem is solved by a machine and a method for making a yarn in accordance with the appended claims and / or having one or more of the following features.

[0012] According to one aspect, the invention relates to a machine for making a yarn comprising decorative elements according to claim 1.

[0013] According to another aspect, the invention relates to a method for making a yarn comprising decorative elements according to claim 11.

[0014] The threading body is preferably fixed with respect to said flow of decorative elements.

[0015] According to the Applicant, the flow (preferably continuous) of decorative elements directed against the first end portion of the fixed threading body, facing against the direction of the flow itself, allows for achieving automatic threading of the decorative elements on the threading body by simple interaction between the flow of decorative elements and the fixed abutment provided by the first end portion. In fact, although the decorative elements can also be loaded into the reservoir in a disorderly fashion (e.g., by pouring them into the reservoir), the interaction between the flow of decorative elements and the first end portion enables a set of decorative elements to be threaded, by virtue of a simple statistical event, onto the first end portion (by exploiting the hole the decorative elements are typically provided with). In this manner, the set of threaded decorative elements can be arranged in sequence in an orderly fashion along the threading body for being fed sequentially to the thrust body.

[0016] The thrust body in turn, thanks to the alternating motion, repeatedly arranges the decorative elements ready to be coupled, by the needle, to at least one textile thread, thereby making the final yarn.

[0017] The present invention thus enables the yarn to be made in continuous mode, starting from the threading of the decorative elements until their coupling to the at least one textile thread. In this manner, the process is completely automated, rapid and effective, and one avoids intermediate steps of manual intervention by an operator, such as, for example, repeated loading into a machine of pluralities of decorative elements previously threaded onto a support for being unthreaded by the latter and coupled, or the arrangement of each decorative element one at a time in position for being fed to the thrust body.

[0018] Furthermore, thanks to the present invention, one avoids the need to provide a continuous strip of decorative elements connected to each other, from which the decorative elements are cut one by one before being fed to the needle. Such a cutting process, in fact, though it can be automated, does not satisfy the desired aesthetic requirements, since, precisely because of the cutting action, the decorative elements are frequently damaged (for example, the totally round shape of sequins can be altered because of the sharp cut and also prove irritating to the touch).

[0019] In one or more of the aforesaid aspects, the present invention can have one or more of the following preferred features. Preferably, said reservoir has a cylindrical shape having a central axis of symmetry. Preferably, said reservoir is rotationally fixed to said main body for rotating about said central axis of symmetry. In this manner, the (continuous) flow of decorative elements is obtained in a simple manner.

[0020] Preferably, said reservoir comprises a bottom having a (substantially) planar shape and arranged horizontally. Said bottom, in a radially external position, preferably comprises a circumferential groove (e.g., in proximity of an inner wall of the reservoir, distal from the central axis of symmetry). In this manner, a region with a larger presence of decorative elements is created, to the advantage of the automatic threading.

[0021] Preferably, said first end portion is positioned at said groove, more preferably in position vertically higher than said groove. In this manner, it is conveniently positioned for interacting with the flow of decorative elements.

[0022] Preferably, said first end portion has (substantially) horizontal development, more preferably tangent to a circumference centred on said central axis of symmetry of said reservoir. In this manner, threading is facilitated.

[0023] Preferably, said first end portion is tapered (e.g., pointed). In this manner, the threading of the decorative elements is facilitated.

[0024] Preferably, said threading body is made of rigid material, preferably metallic, more preferably filiform. For example, the threading body is a rigid (self-supporting) metal wire. In this manner, it is lightweight and robust at the same time. Preferably, said first end portion of the threading body is arranged at a greater height than a height of said second end portion. In this manner, the movement of the decorative elements along at least one portion of the threading body from the reservoir to the thrust body is facilitated by the force of gravity.

[0025] Preferably, said machine comprises one or more thrust wheels rotationally fixed to said main body and arranged in proximity of said threading body, more preferably each in a respective position along at least part of said longitudinal development of the threading body. Preferably, each thrust wheel is structured and shaped for rotating about a respective axis of rotation and for thrusting, as a consequence of said rotation, said decorative elements (threaded onto said threading body) along a respective portion of said threading body. In this manner, the movement of the decorative elements is facilitated.

[0026] Preferably, each thrust wheel is provided with fins having radial development with respect to the respective axis of rotation. Preferably, each fin comprises a radial end edge having two lateral portions and a central portion, interposed between said lateral portions, having smaller radial development than said lateral portions (e.g., a notch is created on the edge, preferably with a V shape). Preferably, said threading body is arranged at said central portion of (at least) one fin of at least one of, more preferably all, said one or more thrust wheels. In this manner, with the rotation of the thrust wheels, each respective fin is brought in proximity of the threading body and arranged with the respective lateral portions on opposite sides of the threading body for contacting the decorative elements, in order to thrust them along the threading body, without interfering with the threading body.

[0027] Preferably, said threading body is free to move with respect to said main body (e.g., it is devoid of any rigid fixing to said main body). Preferably, said threading body is arranged so as to rest on at least one of said one or more thrust wheels. The Applicant has realised that the threading body's own rigidity and / or weight are sufficient to maintain the threading body in position without the latter having to be fixed directly to the main body. In this manner, the arrangement of the threading body is simple and advantageous, also in relation to the passage of the decorative elements, which would be hindered by the presence of direct fixing with the main body.

[0028] Preferably, said threading body comprises at least one ascending portion arranged (directly) downstream of said first end portion with respect to a direction of threading of the decorative elements, more preferably having substantially rectilinear development. Preferably, said threading body comprises at least one curved portion arranged downstream of said ascending portion with respect to said direction of threading. Preferably, said threading body comprises a descending portion arranged downstream of said curved portion with respect to said direction of threading. In this manner, at least one fold is made whereby to position the threading body, as described below.

[0029] Preferably, said curved portion is fitted over a thrust wheel, preferably resting on one or more of the respective fins, more preferably in the central portion of the radial end edges of the fins (in the absence of threaded decorative elements). In this manner, the threading body is arranged in position without obstacle to the passage of the threaded decorative elements.

[0030] Preferably, said main body comprises a (substantially) horizontal rest surface.

[0031] Preferably, said needle is movable with (substantially) vertical trajectory. Preferably, said needle, along said trajectory, penetrates through said rest surface (conveniently perforated along the trajectory of the needle). In this manner, the needle can contribute to the coupling of the decorative elements as occurs, for example, in a traditional sewing machine and as will be better described below.

[0032] Preferably, said thrust body assumes said extended position and said retracted position by sliding horizontally along a (substantially) respective trajectory rectilinear, more preferably above said rest surface. In this manner, the movement is simple.

[0033] Preferably, said trajectory of the thrust body is (substantially) perpendicular to said trajectory of the needle. In this manner, the action of the thrust body is direct.

[0034] Preferably, said thrust body, when in said retracted position, is arranged on the opposite side of said second end portion with respect to said needle (e.g., said trajectory of said needle). In this manner, pushing the decorative elements into position is simple and direct.

[0035] Preferably, said coupling device comprises a storage bay for storing said decorative elements (after they have been threaded onto said threading body). Preferably, said storage bay is arranged above said rest surface. Preferably, said threading body ends in said storage bay. In this manner, the threaded decorative elements can be accumulated in orderly fashion.

[0036] Preferably, said storage bay comprises a through hole having a first mouth and a second mouth opposite to each other, said first mouth being at a greater height than said second mouth. Preferably, said second end portion of the threading body is inserted into said hole through said first mouth (the threading body ending before or at said second mouth). In this manner, the decorative elements can be unthreaded from the threading body maintaining an orderly arrangement (e.g., stacked in the hole).

[0037] Preferably, said through hole has (substantially) vertical rectilinear development. Preferably, said second end portion has (substantially) vertical development (substantially parallel to the development of the through hole). In this manner, the sliding of the decorative elements and / or the unthreading thereof from the threading body (e.g., by gravity) is facilitated.

[0038] Preferably, said through hole has a width (e.g., diameter) comparable with a main dimension (diameter) of said decorative elements. In this manner, maintaining the decorative elements in an orderly position is facilitated.

[0039] Preferably, said thrust body slides below said second mouth, more preferably closing said second mouth when in said extended position and opening said second mouth when in said retracted position. In this manner, the thrust body, when in the extended position, prevents the uncontrolled discharge of decorative elements through the second mouth of the hole, whereas, when in retracted position, it enables the controlled discharge of a predefined number of decorative elements (typically one at a time).

[0040] Preferably, a vertical distance between said second mouth and said rest surface is substantially equal to a thickness of said thrust body. In this manner, the thrust body acts easily on the decorative element (or on the decorative elements) that have left the hole.

[0041] Preferably, said thrust body comprises (more preferably consists in) a plate-like element, e.g., a thin (metal) plate, more preferably of a thickness comparable with a thickness of said decorative elements. In this manner, the machine is dimensioned for processing one decorative element at a time and / or the action of the thrust body on the single decorative element is facilitated.

[0042] Preferably, said thrust body has motion synchronous with a motion of said needle along said respective trajectory. In this manner, the two elements cooperate in an effective manner.

[0043] In one embodiment, said machine comprises a mechanical coupling between said needle and said thrust body for achieving said synchronous motion. For example, said mechanical coupling comprises one or more cams and / or one or more connecting rods, hinged to each other in sequence.

[0044] In one embodiment, said machine comprises an electric motor (distinct from a motor dedicated to moving the needle) connected to said thrust body and conveniently configured for achieving said synchronous motion. In this manner, the internal mechanics is simplified.

[0045] Preferably, said thrust body comprises a respective end portion proximal to said needle having a V shape. Preferably, with said thrust body in said extended position, opposite arms of said V shape are arranged on opposite sides of said trajectory of said needle. In this manner, the decorative element is centred with respect to the trajectory of the needle, at the same time avoiding a direct presence of the thrust body on the trajectory.

[0046] Preferably, said coupling device is structured for coupling said decorative elements to said at least one textile thread according to a sewing program. Preferably, said sewing program is a two-thread chain stitch. The Applicant has found that this type of stitch is advantageous for making the yarn, for example in terms of robustness of the coupling of the decorative elements with the textile threads.

[0047] Preferably, said machine comprises a compressed air system structured for pushing said decorative elements along (at least part of) said threading body. Preferably, said compressed air system comprises a crown (e.g., fixed) having a central through hole into which said threading body is inserted. Preferably, said compressed air system comprises at least one inlet for said compressed air and one or more dispensing ducts, connected to said at least one inlet, made in said crown and in communication with said central through hole of the crown. In this manner, the transit of the decorative elements along the threading body is facilitated.

[0048] Preferably, said machine comprises a tensioning system structured for setting said yarn under mechanical tension. Preferably, said tensioning system comprises a first roller having a respective axis of rotation arranged (substantially) horizontally. Preferably, said first roller is arranged on the opposite side of said needle with respect to said thrust body (e.g., when in the retracted position). In this manner, by maintaining the yarn under tension, the execution of the sewing program is facilitated.

[0049] Preferably, said machine comprises a system for winding said yarn, preferably arranged on the opposite side of said tensioning system with respect to said needle. Preferably, said winding system comprises a second and a third roller having respective axes of rotation arranged (substantially) horizontally and (substantially) parallel to each other. Preferably, said axis of rotation of said second roller is fixed. Preferably, said axis of rotation of said third roller is movable with respect to said second roller along a radial direction. In this manner, the yarn is wound around the third roller free to slide radially as the diameter of wound yarn increases.

[0050] Preferably, the third roller is removable with respect to a fixed support of said winding system. In this manner, the unloading of the wound spool of yarn is simplified.

[0051] Preferably, said machine comprises at least one detecting sensor (e.g., a photocell) for detecting, in continuous mode, a degree of filling of said threading body, more preferably configured for detecting, in continuous mode (in a detection point), a (mean) diameter of said threading body and returning a filling signal on condition that a detected diameter of said threading body is larger than a given threshold for a given time interval. Preferably, said machine comprises a command and control unit connected to said detecting sensor and programmed and configured for commanding a motion (e.g., the rotation) of said reservoir as a function of said signal of filling returned by said detecting sensor. In this manner, the reservoir is set in motion in accordance with a degree of filling of the threading body (e.g., to avoid blockages), limiting the disturbances given by the passage of a single decorative element (in which the detected diameter is larger than the given threshold but for an insufficient time interval).

[0052] Preferably, prior to said setting in motion said decorative elements, said method comprises loading (e.g., by pouring) said decorative elements distinct and separate from each other into a reservoir. In this manner, the loading is rapid.

[0053] Preferably, said method comprises detecting, in continuous mode, a degree of filling of said threading body, more preferably detecting, in continuous mode (in a detection point), a (mean) diameter of said threading body and returning a signal of filling on condition that a detected diameter of said threading body is larger than a given threshold for a given time interval. Preferably, said method comprises adjusting said setting in motion said decorative elements as a function of said signal of filling. In this manner, blockages are limited.

[0054] According to a further aspect, the present invention relates to a method for producing a fabric (e.g., woven, knit, etc.), and an associated fabric, which uses the yarn made by means of the method according to the present invention. For example, the yarn can be used on a loom in making a weft and warp fabric (also called woven), and / or on knitting machines (e.g., Raschel machines) in making a knit fabric, for example chain knit.

[0055] According to yet a further aspect, the present invention relates to a method for producing an item of clothing, and an associated item of clothing, which uses the fabric made according to the present invention.Brief description of the figures

[0056] figure 1 shows a machine according to the present invention, schematically and in a perspective view; figure 2 shows a detail of figure 1; figure 3 shows a partially sectional side view of a detail of the machine in figure 1; figure 4 shows a side view of a detail of the machine in figure 1; figure 5 shows a side sectional view of the machine in figure 1. Detailed description of some embodiments of the invention

[0057] The features and advantages of the present invention will be further clarified by the following detailed description of some embodiments, presented by way of example and not by way of limitation of the present invention, with reference to the appended figures.

[0058] In the figures, the number 1 denotes a machine for making a yarn comprising decorative elements 99 (shown only in fig. 5).

[0059] The machine 1 comprises a fixed main body 2. By way of example, the main body 2 comprises a lower portion 3, for example obtainable by readapting the structure of a common sewing machine (e.g., for sewing fabrics), and an upper portion, fixed above the lower portion 3 and comprising a supporting shaft 5 having vertical development.

[0060] The machine 1 comprises a reservoir 6 suitable for containing a plurality of decorative elements. The reservoir 6 is movable with a direction of motion with respect to main body 2 for setting in motion the plurality of decorative elements in a flow (not shown).

[0061] By way of example, the reservoir 6 has a cylindrical shape having a central axis of symmetry 100 (fig. 3) and is rotationally fixed to the main body 2, by way of example at the supporting shaft 5, for rotating about the central axis of symmetry 100 (thereby creating a continuous flow of decorative elements).

[0062] In one embodiment, not shown, the flow of decorative elements can be achieved by means of a reservoir that is movable with motion other than rotation, such as, for example, an alternating oscillatory motion.

[0063] By way of example, the reservoir 6 is open at the top and comprises a bottom having a planar shape, arranged horizontally. By way of example, the bottom comprises, in a radially outer position, a circumferential groove 7, obtained in proximity of an inner wall of the reservoir.

[0064] By way of example, the supporting arm 5 comprises an upper portion 50 (fig. 3) having a U shape, arranged above the reservoir and at least partially inside a volume of the reservoir 6 (e.g., defined by the walls and bottom of the reservoir). By way of example, the machine 1 comprises a motor 8, arranged below the reservoir 6 and mechanically connected to the reservoir for rotating the reservoir.

[0065] The machine 1 further comprises a coupling device 9 comprising a needle 10, movable with respect to the main body 2, by way of example, with alternating motion along a vertical trajectory, and a thrust body 11 structured for alternatively assuming an extended position, in which it is proximal to the needle 10 (shown in the figure), and a retracted position (not shown), in which it is distal from the needle 10.

[0066] By way of example, the needle 10 comprises an eye (not shown) in a respective end portion, the eye being intended to receive a textile thread, as will be better described below.

[0067] By way of example, the thrust body 11 consists in a thin metal plate of thickness comparable with a thickness of the decorative elements 99 and having a respective V-shaped end portion 52 proximal to the needle, where, with the thrust body in the extended position, opposite arms of the V shape are arranged on opposite sides of the trajectory of the needle (figs. 1 and 5).

[0068] The machine 1 comprises a threading body 12 having continuous longitudinal development from the reservoir 6 to the thrust body 11 and comprising a first 13 and a second end portion 14 opposite to each other. By way of example, the threading body 12 is a rigid (self-supporting) metal wire.

[0069] The first end portion 13 is arranged inside the reservoir 6 in position such as to be hit by the flow of decorative elements and facing against the direction of motion of the reservoir 6.

[0070] By way of example, the first end portion 13 is positioned at the groove 7 in a vertically higher position than the groove, the first end portion 13 having, by way of example, horizontal development tangent to a circumference centred on the central axis of symmetry 100 of the reservoir 6. By way of example (not shown), the first end portion 13 is moreover tapered (e.g., pointed) to further facilitate the threading of the decorative elements.

[0071] The second end portion 14 is arranged at the thrust body 11.

[0072] By way of example, the first end portion 13 of the threading body is arranged at a greater height than the height of the second end portion 14.

[0073] By way of example, the machine comprises four thrust wheels 15 rotationally fixed to the main body 2, by way of example, in the upper portion 50 of the supporting shaft 5, and arranged in proximity of the threading body 12, each thrust wheel 15 being, by way of example, arranged in a respective position along part of the longitudinal development of the threading body 12, by way of example, in an initial portion of the threading body.

[0074] By way of example, each thrust wheel 15 is structured and shaped for rotating about a respective axis of rotation and for thrusting, as a consequence of the rotation, the threaded decorative elements on the threading body along a respective portion of the threading body.

[0075] By way of example, each thrust wheel 15 is provided with fins 55 having radial (and axial) development with respect to the respective axis of rotation. By way of example, each fin comprises a radial end edge having two lateral portions and a central portion, interposed between the lateral portions, having smaller radial development than the lateral portions. In detail, a notch with a substantially V shape is made, by way of example, on the radial end edge of each fin 55.

[0076] By way of example, the threading body 12 is free to move with respect to the main body 2. In greater detail, the threading body 12 has, by way of example, no rigid fixing to the main body 2, and is arranged so as to rest over the thrust wheel 15 arranged in a vertically higher position, at the central portion of the radial end edges of one or more of the respective fins 55 arranged (on each occasion as the wheel rotates) in a higher position.

[0077] By way of example, the threading body 12 is further arranged at the central portion of at least one fin of the remaining thrust wheels 15.

[0078] By way of example, the threading body 12 comprises at least one ascending portion 16 arranged directly downstream of the first end portion 13 with respect to a direction of threading of the decorative elements, by way of example having substantially rectilinear development. By way of example, the threading body 12 further comprises a curved portion 17 arranged downstream of the ascending portion 16 with respect to the direction of threading, and a descending portion 18 arranged downstream of said curved portion 17 with respect to the direction of threading.

[0079] By way of example, the curved portion 17 is fitted over the thrust wheel 15 arranged in a vertically higher position to create the aforesaid rest.

[0080] By way of example, the main body 2 comprises a horizontal rest surface 19 (fig. 5), by way of example conveniently perforated (not shown) to allow a passage of the needle in its motion along the respective vertical trajectory.

[0081] By way of example, the thrust body 11 assumes the extended position and the retracted position by sliding horizontally along a respective rectilinear trajectory, above the rest surface. By way of example, the trajectory of the thrust body 11 is perpendicular to the trajectory of the needle 10.

[0082] By way of example, the coupling device 9 comprises a storage bay 20 for storing the decorative elements (after they have been threaded on the threading body 12). By way of example, the storage bay 20 is arranged above the rest surface 19, with the threading body 12 ending in the storage bay 20.

[0083] By way of example, the storage bay 20 comprises a through hole 21 having a first mouth 22 and a second mouth 23 opposite to each other, the first mouth 22 being at a greater height than the second mouth 23. By way of example, the hole 21 has vertical rectilinear development and a diameter comparable with (e.g., slightly larger than) a maximum diameter of the decorative elements.

[0084] By way of example, the second end portion 14 of the threading body 12 is inserted, through the first mouth 22, into the hole 21 at a centre of the hole, the threading body ending, by way of example, just before the second mouth 23. By way of example, the second end portion 14 has vertical development (fig. 5).

[0085] With reference to figure 5, it also shows, by way of example, some decorative elements 99 (e.g., centrally perforated sequins) accommodated in the hole, and still threaded on the threading body 12.

[0086] By way of example, the thrust body 11 slides below the second mouth 23. By way of example, the thrust body 11, when in the retracted position, is arranged on the opposite side of the second end portion 14 with respect to the needle 10. By way of example, a vertical distance between the second mouth 23 and the rest surface 19 is substantially equal to a thickness of the thrust body 11.

[0087] By way of example, the machine 1 comprises a mechanical coupling between the needle 10 and the thrust body 11 for achieving a synchronous motion between the two elements (as better described below). By way of example, the mechanical coupling is made by means of one or more cams (not shown) and / or one or more connecting rods 51 (shown only partially), hinged to each other in sequence.

[0088] By way of example, the machine 1 further comprises a tensioning system 24 structured for setting the yarn under mechanical tension. By way of example, the tensioning system 24 comprises a first roller 25 arranged on the opposite side of the needle 10 with respect to the thrust body 11 and having a respective axis of rotation arranged horizontally. By way of example, the machine 1 further comprises a winding system 26 for winding the yarn, by way of example, arranged on the opposite side of the tensioning system 24 with respect to the needle 10. By way of example, the winding system 26 comprises a second 27 and a third roller 28 (the third roller shown in position only in figure 4) having respective axes of rotation arranged horizontally and parallel to each other. By way of example, the axis of rotation of the second roller is fixed, whereas the axis of rotation of said third roller is movable with respect to the second roller along a radial direction, the third roller further being removable with respect to a fixed support 29 of the winding system 26.

[0089] In one embodiment, not shown, the winding system comprises a slider that is movable parallel to the axis of rotation of the second roller with alternating motion, the slider being arranged between the second roller and the tensioning system. The slider can comprise an abutment portion structured for moving the yarn parallel to the axis of rotation of the second roller for winding the yarn in an axially uniform manner.

[0090] By way of example, the machine 1 comprises at least one detecting sensor 30 (shown only schematically in fig. 3), by way of example a photocell (not shown), for detecting, in continuous mode, a degree of filling of the threading body. By way of example, the machine 1 comprises a command and control unit 31 (shown only schematically in fig. 3) connected to the detecting sensor 30.

[0091] By way of example, the machine 1 comprises a compressed air system 70 (shown schematically only in figure 3) structured for pushing the decorative elements 99 along the threading body 12. By way of example, the compressed air system comprises a fixed crown 71 having a central through hole 72 into which the threading body 12 is inserted. By way of example, the compressed air system comprises an inlet 73 (e.g., with a flexible tube) for the compressed air and a dispensing duct 74, made in the crown and in communication with the central hole 72 of the crown. By way of example, the dispensing duct 74 is inclined downwards to facilitate directing the compressed air.

[0092] During use, the machine 1 carries out a method for making a yarn comprising decorative elements 99. By way of example, the method comprises loading the decorative elements into the reservoir 6 by pouring. The method thus comprises setting in motion the decorative elements in a flow having a direction of motion. By way of example, subsequent loadings of decorative elements can take place with the reservoir in movement.

[0093] The method comprises directing the flow of decorative elements against the first end portion 13 of the threading body 12.

[0094] It is then envisaged to feed the decorative elements to the second end portion 14 of the threading body, by sliding along the threading body (by way of example, facilitated by the force of gravity and / or by the flow of compressed air, as described above).

[0095] It is then envisaged to unthread, in sequence, the decorative elements from the second end portion 14 of the threading body 12, by way of example, at the second mouth of the hole 21. By way of example, the decorative element leaves the hole 21 by falling when the thrust body 11 is in the retracted position in which it opens the second mouth.

[0096] It is then envisaged to arrange in sequence, in a coupling position, each decorative element unthreaded from the second end portion, by way of example, by means of the thrust body 11 which advances from the retracted position to the extended one, thrusting the previously unthreaded decorative element towards the needle 10 and arranging it on the trajectory of motion of the needle (i.e., in the coupling position).

[0097] By way of example, the thrust body assumes the retracted and extracted position by moving synchronously with the needle 10.

[0098] At this point, by means of the coupling device 9, it is envisaged to couple in sequence each decorative element arranged in the coupling position to at least one textile thread for making the yarn.

[0099] In greater detail, the coupling device is, by way of example, structured for executing a sewing program called two-thread chain stitch, according to which each decorative element is coupled to two textile threads (not shown). By way of example, a first textile thread is moved by the needle 10 (inserted into the eye) and a second textile thread by a crochet hook (not shown) belonging to the coupling device 9, movable with respect to the main body with motion that is synchronous with the needle, the crochet hook being arranged below the rest surface 19.

[0100] By way of example, the needle 10, together with the first thread, passes through the through hole with which each decorative element is provided, interacting with the crochet hook and the second thread below the rest surface 19 on which the decorative element rests in the coupling position.

[0101] The yarn produced is, by way of example, maintained under tension by the tensioning system, by means of at least one complete winding around the first roller, and wound by the winding system, being arranged between the second and the third roller and wound around the third roller.

[0102] By way of example, it is further envisaged, by means of the detecting sensor 30, to detect, in continuous mode, in a detection point, a (mean) diameter of the threading body and return a signal of filling on condition that the detected diameter is larger than a given threshold for a given time interval. By way of example, it is envisaged, by means of the command and control unit 31, to adjust the motion of the reservoir 6 (e.g., to stop the rotation of the reservoir) as a function of the signal of filling returned by the detecting sensor. needle 10.

[0103] At this point, by means of the coupling device 9, it is envisaged to couple in sequence each decorative element arranged in the coupling position to at least one textile thread for making the yarn.

[0104] In greater detail, the coupling device is, by way of example, structured for executing a sewing program called two-thread chain stitch, according to which each decorative element is coupled to two textile threads (not shown). By way of example, a first textile thread is moved by the needle 10 (inserted into the eye) and a second textile thread by a crochet hook (not shown) belonging to the coupling device 9, movable with respect to the main body with motion that is synchronous with the needle, the crochet hook being arranged below the rest surface 19.

[0105] By way of example, the needle 10, together with the first thread, passes through the through hole with which each decorative element is provided, interacting with the crochet hook and the second thread below the rest surface 19 on which the decorative element rests in the coupling position.

[0106] The yarn produced is, by way of example, maintained under tension by the tensioning system, by means of at least one complete winding around the first roller, and wound by the winding system, being arranged between the second and the third roller and wound around the third roller.

[0107] By way of example, it is further envisaged, by means of the detecting sensor 30, to detect, in continuous mode, in a detection point, a (mean) diameter of the threading body and return a signal of filling on condition that the detected diameter is larger than a given threshold for a given time interval. By way of example, it is envisaged, by means of the command and control unit 31, to adjust the motion of the reservoir 6 (e.g., to stop the rotation of the reservoir) as a function of the signal of filling returned by the detecting sensor.

Claims

1. Machine (1) for making a yarn comprising decorative elements (99), said machine (1) comprising: - a fixed main body (2); - a reservoir (6) suitable for containing a plurality of decorative elements, said reservoir (6) being movable with a direction of motion with respect to said main body (2) for setting in motion said plurality of decorative elements in a flow; - a coupling device (9) structured for coupling said decorative elements to at least one textile thread for making said yarn, said coupling device comprising: - a needle (10), movable with respect to said main body; and - a thrust body (11) structured for alternatively assuming an extended position, in which it is proximal to said needle (10) for arranging in sequence decorative elements in a coupling position, and a retracted position, in which it is distal from said needle (10); - a threading body (12) for threading said decorative elements (99) thereon having continuous longitudinal development from said reservoir (6) to said thrust body (11) and comprising a first (13) and a second end portion (14) opposite to each other, wherein said first end portion (13) is arranged inside said reservoir (6) in position such as to be hit by said flow of decorative elements, wherein said first end portion (13) faces against said direction of motion of said reservoir (6), and wherein said second end portion (14) is arranged at said thrust body (11).

2. Machine (1) according to claim 1, wherein said reservoir (6) has cylindrical shape having a central axis of symmetry (100), wherein said reservoir (6) is rotationally fixed to said main body (2) for rotating about said central axis of symmetry (100), wherein said first end portion (13) has substantially horizontal development, wherein said threading body (12) is made of rigid material, preferably metallic, preferably filiform, and wherein said first end portion (13) of the threading body (12) is arranged at a greater height than a height of said second end portion (14).

3. Machine (1) according to any one of the previous claims, comprising one or more thrust wheels (15) rotationally fixed to said main body (2) and arranged in proximity of said threading body (12), wherein each thrust wheel (15) is structured and shaped for rotating about a respective axis of rotation and for thrusting, as a consequence of said rotation, said decorative elements along a respective portion of said threading body (12), wherein said threading body (12) is free to move with respect to said main body (2), and wherein said threading body rests on at least one of said one or more thrust wheels (15).

4. Machine (1) according to claim 3, wherein each thrust wheel (15) is provided with fins (55) having radial development with respect to the respective axis of rotation, wherein each fin (55) comprises a radial end edge having two lateral portions and a central portion, interposed between said lateral portions, having smaller radial development than said lateral portions, and wherein said threading body (12) is arranged at said central portion of at least one fin of at least one of said one or more thrust wheels (15).

5. Machine (1) according to any one of the previous claims, wherein said needle (10) is movable with substantially vertical trajectory, wherein said thrust body (11) assumes said extended position and said retracted position by sliding horizontally along a respective substantially rectilinear trajectory, wherein said trajectory of the thrust body (11) is substantially perpendicular to said trajectory of the needle (10), wherein said coupling device (9) comprises a storage bay (20) for storing said decorative elements, and wherein said threading body (12) ends in said storage bay (20).

6. Machine (1) according to claim 5, wherein said storage bay (20) comprises a through hole (21) having a first mouth (22) and a second mouth (23) opposite to each other, said first mouth (22) being at a greater height than said second mouth (23), wherein said second end portion (14) of the threading body (12) is inserted into said hole (21) through said first mouth (22), wherein said through hole (21) has substantially vertical rectilinear development, wherein said second end portion (14) has substantially vertical development, wherein said through hole (21) has width comparable with a main dimension of said decorative elements, and wherein said thrust body (11) slides below said second mouth (23), closing said second mouth (23) when in said extended position and opening said second mouth (23) when in said retracted position.

7. Machine (1) according to any one of the previous claims, wherein said coupling device (9) is structured for coupling said decorative elements to said at least one textile thread according to a sewing program, and wherein said sewing program is a two-thread chain stitch.

8. Machine (1) according to any one of the previous claims, comprising a tensioning system (24) structured for setting said yarn under mechanical tension, wherein said tensioning system (24) comprises a first roller (25) having a respective axis of rotation arranged substantially horizontally, said first roller (25) being arranged on the opposite side of said needle (10) with respect to said thrust body (11), wherein said machine (1) comprises a system (26) for winding said yarn, said winding system (26) comprising a second (27) and a third roller (28) having respective axes of rotation arranged substantially horizontally and substantially parallel to each other, and wherein said axis of rotation of said second roller (27) is fixed and said axis of rotation of said third roller (28) is movable with respect to said second roller (27) along a radial direction.

9. Machine (1) according to any one of the previous claims, wherein said machine (1) comprises at least one detecting sensor (30), for detecting in continuous mode a degree of filling of said threading body (12), and a command and control unit (31) connected to said detecting sensor (30) and programmed and configured for commanding a motion of said reservoir (6) as a function of a signal of filling returned by said detecting sensor (30).

10. Machine (1) according to any one of the previous claims, wherein said machine (1) comprises a compressed air system (70) structured for pushing said decorative elements (99) along at least part of said threading body (12), said compressed air system (70) comprising a crown (71) having a central through hole (72) into which said threading body (12) is inserted, at least one inlet (73) for said compressed air and one or more dispensing ducts (74), connected to said at least one inlet (73), made in said crown (71) and set into communication with said central through hole (72) of said crown (71).

11. Method for making a yarn comprising decorative elements (99), said method comprising: - setting in motion said decorative elements (99) in a flow having a direction of motion by a movable reservoir (6); - directing said flow of decorative elements against a threading body (12) for threading said decorative elements onto a first end portion (13) of said threading body (12), said first end portion (13) facing against said direction of motion of said flow; - by sliding along said threading body (12), feeding said decorative elements to a second end portion (14) of said threading body (12), opposite to the first end portion (13); - unthreading in sequence said decorative elements from said second end portion (14) of the threading body (12); - arranging in sequence in a coupling position each decorative element (99) unthreaded from said second end portion (14); - coupling in sequence each decorative element arranged in the coupling position to at least one textile thread for making said yarn.

12. Method according to claim 11, comprising, prior to said setting in motion said decorative elements, loading said decorative elements distinct and separate from each other by pouring them into a reservoir (6), and wherein said method comprises detecting in continuous mode a degree of filling of said threading body (12), and adjusting said setting in motion said decorative elements as a function of a signal of filling.

13. Method for producing a fabric which uses the yarn made by means of the method according to claim 11 or 12.

14. Method for producing an item of clothing which uses the fabric made according to claim 13.

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