YARN FEEDING DEVICE FOR A YARN PROCESSING MACHINE

Description

The invention relates to a yarn feeding device for a yarn processing machine.

This invention relates to the field of manufacturing devices which are configured for feeding yarn to a machine which is designed to process such a yarn, more particularly a machine tool which is designed to fold such a yarn, in order to obtain an object corresponding to a processed portion of this yarn and resulting from the processing of a portion of this yarn.

Such yarn feeding devices are already known, comprising on the one hand, a frame, on the other hand, a spool of yarn which is mounted so that it can rotate on the frame and, further on the other hand, a system for returning the yarn coming from the spool to the processing machine.

Such a feeding device is configured for feeding yarn to a machine for processing this yarn, more particularly a machine for folding this yarn. Such a processing machine comprises means of driving this yarn which exert tension on the yarn. In fact, such tension is discontinuous so that the yarn feeds the machine intermittently which, particularly due to the inertia of the spool, causes irregularities and inhomogeneities in the folds as well as between the folds of the yarn.

To remedy this problem, it was devised to supplement such a yarn feeding device with a system for returning the yarn coming from the spool to the processing machine. Such a return system is mounted so that it can rotate about an axis of rotation, relative to the frame of the device.

While this type of return system is certainly an improvement, it does not prevent irregularities and inhomogeneities caused by changes in the inertia of the spool during unwinding thereof and/or changes in the cross-section (in particular cross-sectional shape and/or cross-sectional diameter) of the yarn when changing the spool.

Document CN114476847A discloses a yarn feeding device for a yarn processing machine. This yarn feeding device has the features of the preamble to claim 1.

The present invention seeks to remedy the yarn feeding devices of the state of the art.

Another aim of the present invention is to provide a more regular supply of yarn to the machine for processing this yarn.

To this end, the invention relates to a yarn feeding device for a yarn processing machine. Such a feeding device comprises, on the one hand, a frame, on the other hand, a spool of yarn, further on the other hand, means for mounting the spool so that it can rotate about an axis of rotation relative to the frame, on the other hand also, a system for returning the yarn coming from the spool to the processing machine, this yarn return system comprising a return pulley which is configured to engage with the yarn, on the other hand also, means for mounting the return system so that it can rotate about an axis of rotation relative to the frame and, further on the other hand, means for mounting the return system so as to translate relative to the frame along an axis of translation and in the direction of the spool and/or in the direction the processing machine as well as motorized means for driving the translation of this return system along this axis of translation relative to the frame. This yarn feeding device is characterized by the fact that it comprises at least one means for rotating the return system about the axis of rotation relative to the frame.

According to a further feature, the means for mounting the return system so as to translate relative to the frame comprise, on the one hand, at least one rolling or sliding track which the frame comprises, on the other hand, rolling or sliding means which engage with said at least one rolling or sliding track, further on the other hand, a carriage which comprises the rolling or sliding means and which is movable relative to the frame and, on the other hand also, means for mounting the return system on the carriage.

Yet another feature relates to the fact that the motorized translation drive means comprise, on the one hand, a motor which is integral with the frame, on the other hand, at least one transmission means which is engaged with the motor, and further on the other hand, securing means which are configured to secure the transmission means and the return system in translation.

An additional feature relates to the fact that the device comprises at least one means for rotating the return system about the axis of rotation relative to the frame.

In this case, said at least one means for rotating the return system is configured to rotate the return system, so that the return pulley, as the case may be, moves away from or towards the spool.

According to a further feature, the return system comprises an arm, which is mounted so that it can rotate about an axis of rotation relative to the frame, and which has at least one free end which is equipped with the return pulley and with which said at least one rotational drive means engages.

Thus, the present invention relates to a yarn feeding device for a yarn processing machine. This feeding device comprises means for mounting in translation and motorized means for driving the translation of the return system. Advantageously, these features make it possible to synchronize the supply of yarn to the yarn processing machine by the feeding device with the yarn requirement of this processing machine. These features also make it possible to feed the machine for processing this yarn in a regular and continuous manner and with the appropriate quantity of yarn required by the processing machine. These features then make it possible to avoid irregularities and inhomogeneities in the object (particularly in the folds and between the folds of this object) resulting from the processing of a portion of yarn by the machine for processing this yarn. The result is an improvement in the quality of the objects manufactured by the yarn processing machine as well as an improvement in the precision and repeatability of the manufacturing method for such an object.

These features also make it possible to drive the return system to its initial position after a yarn processing cycle has been completed and an object obtained by processing a portion of this yarn in order to complete a new yarn processing cycle.

According to a further feature, the return system comprises a return pulley and the feeding device comprises at least one means for rotating the return system.

Said at least one rotational drive means can, then, be configured to rotate the return system, so that the return pulley moves away from the spool which, advantageously allows the return system to be brought to a stop, the yarn tension to be managed and the yarn to be kept under tension.

Said at least one rotational drive means can, also, be configured to rotate the return system, so that the return pulley approaches the spool which, advantageously, reduces the amplitude of the tilting of the return system as it moves in the direction of the processing machine.

Further objects and advantages of the present invention will become apparent throughout the following description relating to embodiments which are provided only as indicative and non-limiting examples.

The understanding of this description will be facilitated by reference to the attached drawings in which:

FIG. 1 is a schematic side view of a device for feeding yarn according to the invention.

FIG. 2 is a schematic view from the opposite side to that of FIG. 1 of the yarn feeding device according to the invention, before the feeding device is implemented.

FIG. 3 to FIG. 6 are views similar to FIG. 2 and correspond to the feeding device exemplified in FIGS. 1 and 2, at various yarn feeding stages, via this feeding device, to a machine for processing this yarn.

With particular reference to the aforementioned figures, the present invention relates to the field of manufacturing devices which are configured for feeding yarn to a machine which is designed to process such a yarn, more particularly a machine tool which is designed to fold such a yarn, in order to obtain an object corresponding to a processed portion of this yarn and resulting from the processing of such a portion of this yarn.

In this respect, it should be noted that such a yarn F may be made of a metallic material and/or have a diameter (in particular circumscribed) of between 1 mm and 16 mm and/or have a polygonal (in particular square or hexagonal) or circular cross-section.

The invention then relates to a device 1 for feeding yarn F which, for simplicity, will be referred to as “feeding device 1” in the remainder of the description.

Such a feeding device 1 is configured for feeding yarn F to a machine for processing this yarn F.

Such a machine for processing yarn F (not shown), more particularly, consists of a machine for folding such yarn F.

The feeding device 1 comprises a frame 2 which is designed to rest on the ground.

This feeding device 1 also comprises a spool 3 of yarn F. Such a spool 3 of yarn F usually comprises a support (particularly in the form of a reel or the like) and the yarn F which is wound around this support. Such a spool 3 has an axis of revolution which is, preferably, horizontal.

This feeding device 1 also comprises means 4 for mounting the spool 3 so that it can rotate about an axis of rotation Xr1 relative to the frame 2, more particularly on this frame 2. This axis of rotation Xr1 is, preferably, horizontal and/or is at least parallel to (or preferably coincides with) the axis of revolution of the spool 3.

According to another feature, the feeding device 1 comprises a system 5 for returning the yarn F coming from the spool 3 to the processing machine.

This feeding device 1 then also comprises means 6 for mounting the return system 5 so that it can rotate about an axis of rotation Xr2 relative to the frame 2, more particularly on this frame 2. This axis of rotation Xr2 is, preferably, horizontal and/or is at least parallel to the axis of rotation Xr1 of the spool 3.

According to the invention, the feeding device 1 further comprises means 7 for mounting the return system 5 so as to translate along an axis of translation Xt and in the direction of the spool 3 and/or the processing machine relative to the frame 2, more particularly on this frame 2.

Such means of mounting 7 the return system 5 so as to translate relative to the frame 2 comprise, on the one hand, at least one rolling or sliding track 70 which the frame 2 comprises (more particularly which is fixedly attached to this frame 2), on the other hand, rolling or sliding means 71 (more particularly in the form of balls, wheels, castors, of at least a sliding block the like) which engage with said at least one rolling or sliding track 70, further on the other hand, a carriage 72 which comprises the rolling or sliding means 71 and which is movable relative to the frame 2 (more particularly in translation along the axis of translation Xt and in the direction of the processing machine) and, on the other hand also, means 73 for mounting the return system 5 on the carriage 72.

In this respect, it should be noted that the means 73 for mounting the return system 5 on the carriage 72 comprise means for mounting this return system 5 so that it can rotate about an axis of rotation Xr3 on this carriage 72.

As mentioned hereinbefore, the feeding device 1 comprises means 6 for mounting the return system 5 so that it can rotate about the axis of rotation Xr2 relative to the frame 2.

Also and according to another feature of the invention, these means 6 for mounting the return system 5 so that it can rotate relative to the frame 2 then comprise means for mounting this return system 5 so that it can rotate about the axis of rotation Xr3 on this carriage 72.

In this respect, it should be noted that the axes of rotation Xr2 and Xr3 are preferably coincident. Moreover, this axis of rotation Xr3 is preferably perpendicular to the aforementioned axis of translation Xt.

According to the invention, this feeding device 1 then comprises motorized means 8 for driving the translation of this return system 5 along this axis of translation Xt relative to the frame 2, more particularly on this frame 2.

Such motorized translation drive means 8 comprise, on the one hand, a motor 80 which is integral with the frame 2, on the other hand, at least one transmission means 81 which is engaged with the motor 80, and further on the other hand, securing means 82 which are configured to secure the transmission means 81 and the return system 5 in translation.

It should be noted that the motor 80 is, preferably, an electric motor. Said motor 80 comprises, on the one hand, a stator which is fixedly attached to the frame 2 and, on the other hand, a rotor, which can be rotated relative to the stator, and which is engaged with said at least one transmission means 81.

Regarding said at least one transmission means 81, this latter comprises a transmission belt while the motorized translation drive means 8 further comprise a return pulley 83 which engages with the transmission belt.

As mentioned hereinbefore, the motorized translation drive means 8 comprise securing means 82 which are configured to secure the transmission means 81 and the return system 5 in translation. In fact, such securing means 82 are, more particularly, configured to secure the transmission means 81 and the return system 5 in translation, indirectly and via the carriage 72. These securing means 82 are, then, more particularly configured to secure said transmission means 81 and said carriage 72.

According to another feature, the feeding device 1 also comprises at least one means (9; 10) for rotating the return system 5 about the axis of rotation Xr2 relative to the frame 2. In fact, said at least one rotational drive means (9; 10) is, more particularly, configured to rotate the return system 5 about the axis of rotation Xr3 of the return system 5 relative to the carriage 72.

In this respect, it should first be noted that the return system 5 comprises a return pulley 50 which is configured to engage with the yarn F, more particularly on which 50 at least part of this yarn F winds. Such a return pulley 50 is, more particularly, configured to return the yarn F coming from the spool 3 to the processing machine. Such a return pulley 50 can be rotated about an axis of rotation Xr4, relative to the frame 2. This axis of rotation Xr4 is, preferably, horizontal. This axis of rotation Xr4 is, preferably, at least parallel to the axis of rotation Xr1 and/or to the axis of rotation Xr2 and/or to the axis of rotation Xr3.

Also and according to a first type of embodiment, said at least one means 9 for rotating the return system 5 is configured to rotate this return system 5, so that said return pulley 50 moves away from the spool 3.

Advantageously, these features make it possible to bring the return system 5 to a stop (particularly at the start of the yarn F processing cycle and/or to place the return system 5 under stress, more particularly under pre-stress), to manage the tension on the yarn F (particularly based on the cross-section—shape and/or diameter—of the yarn F and/or based on the unwinding stage of the spool 3, more particularly to adapt to the inertia of the spool 3) and to maintain the yarn F under tension (particularly under constant tension).

According to a preferred embodiment exemplified on the appended figures, said at least one rotational drive means 9 of the return system 5 comprises at least one actuator 90.

Such an actuator 90 is, preferably, configured to exert a constant force on the return system 5 and, therefore, on the yarn F, regardless of the position (notably angular) of the return system 5.

Such an actuator 90 is interposed between the carriage 72 and the return system 5.

A first embodiment of this first type of embodiment consists in that at least one means 9 for rotating the return system 5 comprises at least one such actuator 90 which comprises at least one cylinder, preferably of the pneumatic type. Such a cylinder comprises, on the one hand, a cylinder body which is mounted (more particularly fixedly) on the carriage 72 and, on the other hand, a cylinder rod, which is movable (more particularly in translation) relative to the cylinder body, and which engages with the return system 5.

It should be noted that the feeding device 1 may, then, also comprise means for controlling such a cylinder. Such control means can, then, be configured to control such a cylinder so that it can exert at least one specific force, or even (and preferably) a plurality of specific forces, on the return system 5. These control means are, then, also configured to adjust such a force. In particular and in the case of a pneumatic cylinder, these control means can, then, be configured to supply said cylinder with a fluid whose pressure is adjustable via these control means. The presence of such control means, advantageously, allows the tension of the yarn F to be adjusted.

According to another embodiment (not shown) of this first type of embodiment, said at least one means 9 for rotating the return system 5 may comprise at least one such actuator 90 which comprises at least one means for returning this return system 5. Such a return means may be elastic and/or may consist of a spring or the like. Such a return means can be supplemented by a system for adjusting the preload of such a return means. Herein again, the presence of such a preload adjustment system, advantageously, allows the tension of the yarn F to be adjusted.

A particular embodiment consists in that said at least one means 9 for rotating the return system 5 comprises at least one such actuator 90 which comprises, on the one hand, said at least one return means of this return system 5 which is attached to the carriage 72 (more particularly said at least one return means which adopts the form of a spring which has a first end which is attached to the carriage 72), on the other hand, at least one cam which is attached to the return system 5 (and which has, preferably, a variable radius) and, further on the other hand, at least one cable, which engages with said at least one cam (more particularly which is wound around at least part of said at least one cam), having a first end which is attached to said at least one cam and/or to the return system 5 and a second end which is attached to the return means (more particularly to a second end of said spring).

According to a second type of embodiment, said at least one means 10 for rotating the return system 5 is configured to rotate the return system 5, so that the return pulley 50 moves closer to the spool 3.

Advantageously, and when the return system 5 is static, these features allow this return system 5 to be balanced.

In addition and when this return system 5 is moved in the direction of the processing machine (which may be done at strong acceleration), these features can advantageously reduce the amplitude of tilting (or even prevent tilting) of the return system 5 (more particularly in a direction away from the spool 3) and/or reduce (or even prevent) variations in the tension of the yarn F and/or reduce (or even prevent) variations in the tensile forces exerted on the yarn F. In particular, these features make it possible, advantageously, to ensure constant tension on the yarn F during acceleration of the return pulley 50, and to prevent this yarn F from being subjected to the acceleration force of the mass of this return pulley 50.

According to a preferred embodiment, said at least one means 10 for rotating the return system 5 comprises at least one counterweight 100, more particularly which acts as a balance weight.

Regarding said return system 5, this latter 5 also comprises an arm 51.

This arm 51 has at least one free end (510; 511), more particularly a first free end 510 as well as a second free end 511 which is opposite the first free end 510. Said at least one free end (510; 511) is equipped with the return pulley 50 which is, more particularly, mounted so that it can rotate about the axis of rotation Xr4 on said at least one free end (510; 511).

Such an arm 51 is mounted so that it can rotate about an axis of rotation Xr5 relative to the frame 2, more particularly relative to the carriage 72, notably on this carriage 72. This axis of rotation Xr5 is, preferably, horizontal. This axis of rotation Xr5 is, preferably, at least parallel to the axis of rotation Xr1 and/or to the axis of rotation Xr2 (preferably coinciding with this axis of rotation Xr2) and/or to the axis of rotation Xr3 (preferably coinciding with this axis of rotation Xr3) and/or to the axis of rotation Xr4.

According to a further feature, said aforementioned at least one rotational drive means (9; 10) engages with said arm 51.

As mentioned hereinbefore, said at least one actuator 90 (included in said at least one rotational drive means 9 according to the first type of embodiment) is interposed between the carriage 72 and the return system 5. In fact, said at least one actuator 90 is interposed between the carriage 72 and the arm 51 that this return system 5 comprises, more particularly attached to this carriage 72 as well as to this arm 51.

In this respect, it should be noted that the rod of said at least one cylinder (included in said at least one actuator 90 included in said at least one rotational drive means 9) then engages with said arm 51, more particularly by being made integral in displacement with this arm 51.

It should also be noted that the counterweight 100 (included in the at least one rotational drive means 10 conforming to the second type of embodiment) also engages with said arm 51, more particularly by being fitted to this arm 51 and/or by being attached to this arm 51.

According to another feature, said arm 51 comprises, on the one hand, the first free end 510 which is equipped with the return pulley 50 (more particularly as mentioned hereinbefore), on the other hand, the second free end 511 which is equipped with the counterweight 100 (more particularly as mentioned hereinbefore) and, further on the other hand, an intermediate portion 512, which extends between the first free end 510 and the second free end 511, and which is mounted so as to rotate about the axis of rotation Xr5 relative to the frame 2, more particularly relative to the carriage 72, notably on this carriage 72.

Yet another feature relates to the fact that said arm 51 comprises a first section 513 which comprises, on the one hand, a first distal end 514 (which corresponds, more particularly, to the aforementioned first free end 510) equipped with the return pulley 50 (more particularly in the aforementioned manner) and, on the other hand, a first proximal end 515 (more particularly comprising the aforementioned intermediate portion 512), which is opposite the first distal end 514, and which is mounted so that it can rotate about the axis of rotation Xr5 relative to the frame 2 (more particularly relative to the carriage 72, notably on this carriage 72).

This arm 51 also comprises a second section 516, which is integral (more particularly in rotation about the axis of rotation Xr5) with the first section 513, and which comprises, on the one hand, a second distal end 517 (which corresponds, more particularly, to the aforementioned second free end 511 equipped with the counterweight 100) and, on the other hand, a second proximal end 518 (more particularly comprising the aforementioned intermediate portion 512), which is opposite the second distal end 517, and which is rotatably mounted about said axis of rotation Xr5 relative to the frame 2 (more particularly relative to the carriage 72, notably on this carriage 72).

According to another feature, the first section 513 of the arm 51 is mounted so that it can rotate about the axis of rotation Xr5 on the carriage 72 while the second section 516 of the arm 51 is also mounted so that it can rotate about the axis of rotation Xr5 on the carriage 72. This first section 513 and this second section 516 of the arm 51 are, then, positioned on both sides of the carriage 72, more particularly so that this carriage 72 is interposed between this first section 513 and this second section 516.

Yet another feature relates to the fact that the feeding device 1 comprises actuating means which are configured to actuate said at least one rotational drive means (9; 10). Such actuating means are, more particularly, configured to actuate said at least one actuator 90 which said at least one rotational drive means (9; 10) conforming to the first type of embodiment comprises.

These actuating means then rotate the return system 5 so as to move the return pulley 50 away from the spool 3 and, thus, tension the yarn F, more particularly before the processing machine is implemented.

The feeding device 1 may, also, comprise means 11 for detecting the position (notably the angular position) of the return system 5 (more particularly the arm 51 of this return system 5) relative to the frame 2 and/or relative to the carriage 72. The actuating means of said at least one rotational drive means (9; 10) can, then, also be configured to actuate said at least one drive means (9; 10) based on the detected position (notably angular) of the return system 5. Advantageously, these features make it possible to tension and/or maintain tension on the yarn F, notably during implementation of the processing machine. These features also make it possible to compensate for changes in the inertia of the spool 3 as it unwinds and/or changes in the cross-section (notably cross-sectional shape and/or cross-sectional diameter) of the yarn F when changing the spool 3.

An additional feature relates to the fact that the feeding device 1 comprises motorized means 12 for rotating the spool 3 about the axis of rotation Xr1 relative to the frame 2, more particularly on this frame 2.

The feeding device 1 then, also, comprises means for controlling these motorized means 12 for rotating the spool 3.

Such control means can be configured to control these motorized means 12 for rotating the spool 3 so that they can rotate the spool 3 in the direction of winding of the yarn F onto this spool 3. Advantageously, such a feature makes it possible to exert tension on this yarn F, more particularly in order to place this yarn F under tension, notably before the processing machine is implemented.

Such control means can, also, be configured to control these motorized means 12 for rotating the spool 3 so that they rotate the spool 3 in the direction of unwinding of the yarn F from this spool 3. Advantageously, such a feature allows the processing machine to be supplied with yarn F during the implementation of this processing machine.

These control means may, in particular, be configured to control the rotational drive speed of the spool 3, therefore the unwinding speed of the spool 3.

In particular, these control means may be configured to control the rotational drive speed of the spool 3 based on the position of the return system 5 relative to the frame 2 and/or based on the parameters of the motorized means 8 for driving the translation of the return system 5, more particularly based on the speed of the translational displacement of the carriage 72 controlled by these motorized means 8 for driving the translation of the return system 5.

The feeding device 1 may also comprise means for controlling the motorized means 8 for driving the translation of the return system 5.

These control means may be configured to control the translation of this return system 5 in the direction of the processing machine (more particularly during the implementation of this processing machine) or in a direction opposite to this processing machine (more particularly after the production of an object and before the production of a new object).

These control means can also be configured to control the translation drive speed of the return system 5 relative to the frame 2, more particularly to compensate for variations in the unwinding speed of the spool 3, especially when the motorized means 12 for driving the rotation of this spool 3 are controlled so that the rotational speed is constant and/or continuous.

Finally, the feeding device 1 comprises means for controlling said at least one means (9; 10) for rotating the return system 5, more particularly based on the means 11 for detecting the position of this return system 5 (notably based on the parameters recorded by these detection means 11) and/or based on the motorized means 8 for driving the translation of the return system 5 (notably based on the parameters of these means 8) and/or based on the motorized means 12 for rotating the spool 3 (notably based on the parameters of these means 12) and/or based on the control means for the motorized translation drive means 8 (notably based on the parameters of these control means) and/or based on the control means for the motorized rotational drive means 12 (notably based on the parameters of these control means).

It should also be noted that the presence of said at least one means for rotating (more particularly conforming to the first type of embodiment 9, or even conforming to the second type of embodiment 10) the return system 5 and the motorized means 8 for driving the translation of the return system 5 allows, advantageously, the machine for processing yarn F to be fed sequentially and/or based on demand, from the spool 3 which can be unwound continuously (more particularly via the motorized means 12 for rotating this spool 3).

The invention also relates to a method for feeding yarn F to a yarn processing machine F. This method is, more specifically, implemented by means of the feeding device 1 disclosed hereinbefore.

This method is exemplified in the appended figures.

FIGS. 1 and 2 exemplify the feeding device 1 pending implementation of this device 1 for feeding yarn F, the machine for processing the yarn F and the method for feeding yarn F.

FIG. 3 exemplifies a first step of the method of feeding yarn F, which consists in rotating the spool 3 about the axis of rotation Xr1 relative to the frame 2, by means of motorized rotational drive means 12 and in the direction of winding of the yarn F onto this spool 3. This first step advantageously makes it possible to exert a tension on this yarn F, more particularly in order to place this yarn F under tension, notably before the processing machine is implemented.

A second step of the yarn F feeding method consists in driving the translation of the return system 5 and/or the carriage 72 along the axis of translation Xt relative to the frame 2 and in the direction of the yarn F processing machine, by means of the motorized means 8 for driving the translation.

During this second step, the return system 5 and/or the carriage 72 can be translated synchronously with the tension exerted by the processing machine on the yarn F, more particularly by means of the motorized means 8 for driving the translation and the aforementioned control means for these motorized means 8 for driving the translation.

Prior to this second step of the method and, as the case may be, prior to the first step of the method and/or after this first step of the method, the method may, also, comprise a step in which the return system 5 is rotated about the axis of rotation Xr2, so that the return pulley 50 moves away from the spool 3. This step is implemented by means of said at least one rotational drive means 9 (more particularly in accordance with the first type of embodiment, in particular in accordance with the first embodiment disclosed hereinbefore) about the axis of rotation Xr2 of the return system 5 relative to the frame 2.

A third step of the method consists in rotating the spool 3 about the axis of rotation Xr1 relative to the frame 2, by means of motorized rotational drive means 12 and in the direction of unwinding of the yarn F from this spool 3.

During this third step, the spool 3 can be rotated continuously by means of motorized rotational drive means 12 and control means for these motorized rotational drive means 12.

Alternatively or additionally, during this third step, the translation of the return system 5 and/or of the carriage 72 can be synchronized and/or controlled with the rotation of the spool 3, more particularly based on the demand for yarn F of the machine for processing yarn F. Such translation can be ensured by means of the motorized translational drive means 8 and/or the motorized rotational drive means 12 as well as by the aforementioned control means for these motorized translational drive means 8 and/or these motorized rotational drive means 12.

According to a particular embodiment of the invention, the second step and the third step of the yarn F feeding method can be implemented concomitantly.

This second step and this third step are exemplified in FIGS. 3 to 5.

This second step and/or third step are implemented during an object manufacturing cycle by the machine for processing the yarn F, starting from a distal position wherein the return system 5 and/or the carriage 72 are positioned at a distal end of the rolling or sliding track 70 and/or at a distance from the spool 3 (as exemplified in FIG. 3), and until the return system 5 and/or the carriage 72 reach a proximal position wherein the return system 5 and/or the carriage 72 are positioned at a proximal end (opposite to the distal end) of the rolling or sliding track 70 and/or close to the spool 3 (as exemplified in FIG. 5).

A fourth step of the method of feeding yarn F consists in driving the translation of the return system 5 and/or the carriage 72 along the axis of translation Xt relative to the frame 2 and in a direction opposite to that of the machine for processing the yarn F, by the motorized translation drive means 8, from the proximal position (exemplified in FIG. 5) and up to the distal position of this return system 5 and/or this carriage 72 exemplified in FIG. 6.

When the return system 5 and/or the carriage 72 adopt this proximal position and/or have reached this proximal end of the rolling or sliding track 70, the method of feeding the yarn F has completed an object manufacturing cycle and the feeding device 1 is ready to complete a new manufacturing cycle for a new object.