EP0078720A1 - Method of knitting stripes or repeating crossbands on a multisystem circular knitting machine, apparatus therefor and products obtained - Google Patents

Method of knitting stripes or repeating crossbands on a multisystem circular knitting machine, apparatus therefor and products obtained Download PDF

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Publication number
EP0078720A1
EP0078720A1 EP82401792A EP82401792A EP0078720A1 EP 0078720 A1 EP0078720 A1 EP 0078720A1 EP 82401792 A EP82401792 A EP 82401792A EP 82401792 A EP82401792 A EP 82401792A EP 0078720 A1 EP0078720 A1 EP 0078720A1
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Prior art keywords
thread
fall
needles
knitting
different
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EP82401792A
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German (de)
French (fr)
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EP0078720B2 (en
EP0078720B1 (en
Inventor
Bernard Guenin
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Dore-Dore Ets
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Dore-Dore Ets
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Priority to AT82401792T priority Critical patent/ATE12268T1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/10—Patterned fabrics or articles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
    • D04B9/28—Circular knitting machines with independently-movable needles for producing patterned fabrics with colour patterns
    • D04B9/30—Circular knitting machines with independently-movable needles for producing patterned fabrics with colour patterns by striping

Definitions

  • the invention aims to avoid these various drawbacks.
  • a multi-drop circular knitting loom capable of knitting in jersey or in derivative textures, for example in charged stitches or Jacquard, it makes it possible to knit repetitive stripes or transverse bands, of any height which extend over the entire periphery of the article, without cutting the threads at each change.
  • each of the scraps is permanently supplied with a well-defined wire so that, at each drop, a wire is in work or ready to go into work, while by means of a selection device needles associated with each of the scraps, each strip is started by changing the working thread by controlling on the one hand the device for selecting the scraps whose thread is still in work, so that the needles now stop picking the thread at this fall and, on the other hand, the selection device associated with the other fall, the thread of which had not been in use until then, so that the needles now pick the thread at this fall; the reverse operations being carried out at the end of a strip after an integer multiple of turns of the looms.
  • This method which makes it possible to obtain strips having any height in the direction of the mesh columns has the advantage that there is a continuous mesh of the wires at transition places.
  • the yarn put out of work is not cut and simply extends on the wrong side of the knit to the next area of the knit where it is taken up to work again.
  • the invention makes it possible to knit n strips of different appearance, with for each strip, k scraps working at the same time.
  • the invention also extends to multi-fall circular looms suitable for implementing the method.
  • These looms comprising at least two scraps supplied with different threads and a device for selecting needles which must work at a drop during each revolution of the loom cylinders and those which must on the contrary remain inactive, are characterized in that the means controlling these selection devices are arranged so that the control takes place after an integer multiple of turns of the looms of the loom.
  • the invention also extends to knitted articles obtained such as clothing, stockings, socks, etc.
  • These articles comprising one or more circular bands of wires of different appearance extending over the entire periphery of the article, are characterized in that the bonding of the wire from one band to the wire different from the adjacent zone of the article is a continuous mesh.
  • FIG. 1 is a diagram showing a few rows of meshes on a large scale and intended to explain the principle of the invention.
  • Figure 2 illustrates a variant.
  • FIG. 3 represents the evolution of the yarn or yarns of the canceled scraps while knitting takes place on another scrap.
  • Figure 4 is a schematic view of an embodiment of the control of needle selection cams, adaptable for example on circular double cylinder loom without Jacquard system.
  • the assembly of FIGS. 5a to 5d shows the lining of the needle plates on the lower cylinder of the loom for controlling the selection cams according to the arrangement illustrated in FIG. 4.
  • Figure 6 is a schematic perspective view of a circular loom equipped with a thread thrower change device.
  • the needle selection device associated with this first fall initiates the rise of all the needles, starting with the needle of the column of stitches "M”, then brings them in full ascent so that all the needles pick the thread "fl", the picking being followed by a normal slaughter. (To fully understand the design, it must be remembered that knitting descends in the loom, as it is made, so that the rows of stitches made first are at the bottom of Figure 1).
  • the device for selecting the first fall prevents the ascent, towards the wire picking position, of all the needles which follow the last needle to be picked in the column of meshes "N". Consequently, the following needles will pass to the first fall in the low position of complete slaughter, without further picking the thread "f1", the thrower of which however remains fixed in position and ready for work.
  • the needles which all come to stop the picking at the first fall, are now presented to the device for selecting the second fall, including the cam, which has just been placed in working position, initiate their Ascent always starting with the needle of the column of meshes "M”, then the needles are brought in full ascent to pick the wire "f2" there, culling followed by a normal felling.
  • a float thread "ff" exists on the reverse side of the knitted fabric, connecting two stripes or bands of the same color in the longitudinal direction.
  • the last needle having meshed drives this thread in its displacement on the circumference of the cylinder, without there meeting any obstacle since all the needles knit in jersey and are in low position d complete slaughter.
  • the wire thus entrained, (f2, figure 3), therefore sweeps the surface above the lower cylinder (or the free space between upper and lower cylinders, if it is a double cylinder loom) by forming a secant of increasing length from the eyelet of the j2 j2 to the point diametrically opposite to the fall which has just been canceled.
  • the secant of the wire decreasing, it is necessary to absorb each cylinder turn excess wire by pulling it back in the opposite direction through the thrower.
  • An additional "fisherman" device P (see FIG. 3) can be used for this, installed at each fall.
  • This device similar to that which manufacturers build on knitting machines for footwear, for knitting heels and toes in reciprocating motion, or on straight knitters to absorb excess yarn after each end of travel of the carriage, comprises a wire guide P1 mounted on a lever P pivoting about an axis P2 and returned by a spring P3.
  • the lever P pulled by the spring compensates for the slack that occurs in the wire and keeps it taut.
  • the selection of the needles to knit at one or the other fall is effected by the action of a movable cam disposed at each of the falls and acting on the knitting heels of the plates.
  • the placing in the operating position and the withdrawal of these cams can be controlled by a set of levers receiving their movements from eccentrics or from cams rotating in synchronism with the movement of the loom, or by an electromagnetic control.
  • the needle selection device On a double cylinder circular loom without the Jacquard system, the needle selection device is composed of two cams, movable in the radial direction and able to approach or move away from the needle cylinder.
  • One of the cams (which will be called “picking bolt V1"), when it is brought closer to the cylinder, initiates the ascent of the needles to allow the picking of the wire; the entry into function of this cam is done on the medium knitting heels "Tt”.
  • cam lock V2 when it is brought closer to the cylinder, initiates the cancellation of the fall by lowering all the needles to the non-picking position; the entry into function of this cam is on the large transfer heels "Tf".
  • FIG. 4 schematically shows an embodiment of such a device for controlling the selection of needles, adaptable for example to a double cylinder circular loom, devoid of the Jacquard system.
  • Z1 and Z2 respectively represent the lower and upper cylinders of the loom.
  • the picking lock "V1" when advanced towards the needle cylinder, has its inclined ramp facing the path of the knitting heels “Tt” of the plates 1 which cooperate, as known, with the needles 2 of the double type hook.
  • this cam The function of this cam is to initiate and continue knitting a stripe on the fall of the loom with which it is associated. It is shown in Figure 4 in the radially depressed position, that is to say in the working position where the knitting heels "Tt" of the plates are forced to climb the ramp inclined relative to the horizontal.
  • this cam V2 is shown in its position of maximum radial spacing, so that it has no action.
  • the control of the cams is programmed by discs 3 driven in rotation in a continuous manner, in synchronism with the rotation of the cylinders Z1 and Z2, and on which are arranged bosses or cams 4 with which the feeler levers 5 cooperate.
  • a spring 10, placed in the box 8, makes the elastic connection to allow the cam to come into action in two stages. Firstly, the cam rubs on the smallest heels of the plates, as seen for example in FIG. 5a for the cam V1, and secondly the cam is in the fully depressed position after the passage of the heels knitting means (cam V1 in Figure 5a) or large transfer heels (cam V2 in Figure 5b).
  • Figures 5a and 5b provide a better description of the sequence of successive operations for controlling the selection cams, assuming that the loom, comprising two falls each provided with a cam V1 and a cam V2, is used for knitting a sock.
  • FIG. 5a represents a section of the lower cylinder Z1, at the level of the knitting heels Tt of the plates 1.
  • the cam "V1" is pushed into the working position. After having rubbed on a few small knitting heels, it attacks the few medium knitting heels from the needle “M” to initiate the ascent of the needles which will pick the thread at the first fall.
  • the passage of the few heel means after the needle "M” allows the cam V1 to enter completely against the cylinder Z1 and thus all the needles around the entire periphery of the cylinder will initiate the ascent for the picking of the wire for a whole number cylinder turns.
  • FIG. 5b represents a section of the lower cylinder Z1, at the level of the transfer heels Tf of the needle plates.
  • the cam V1 can be moved away from the first fall for the put out of action.
  • the V2 cam can be removed, which cancels completely the first fall.
  • the invention has various advantages.
  • the invention makes it possible to no longer cut the threads at each change of stripes.
  • the basic principle consists in making the transverse stripes without overlapping of wires, or unsightly connections, by permanently feeding a well determined wire at each of the different falls. But this has the consequence of theoretically limiting the possible number of different scratches to the number of falls with which the loom is equipped.
  • the invention takes advantage of such a device by suitably adapting it, so that it multiplies the number of different stripes or transverse bands which can be carried out at the same fall from the loom, while retaining the advantage of neither overlapping, nor cutting of the threads at the changes of stripes, while ensuring the connection of the threads by a normal mesh.
  • Figure 6 shows the principle of operation with change of throwers at one of the falls.
  • the thrower J 22 bringing the wire f 22 to this same fall, is in the retracted position (out of work), but a vertical guide "G" prevents the section of wire connecting the last stitch to the thrower J 22 from entering the chisel "S".
  • the lower end of this guide has a notch in the direction of travel to prevent the section of wire from escaping from the lower part of the guide.
  • the permutation of the throwers is carried out while this fall is not working, that is to say while one is knitting a scratch on another fall.
  • the permutation of the throwers can be carried out without slowing down the progress of the loom, because the needles pass without picking at this canceled fall.
  • the guide "G" is preferably retractable to allow the normal function of the scraper device to be temporarily resumed, for example on knitting machines for footwear for the introduction and removal of the elastic thread at the ribbing, or reinforcing wire in heels and toes.
  • the retractable guide "G" can be replaced by a selective command of the operation of the scissors; thus, when a thrower goes out of work, the wire is normally placed in the chisel, but the latter remains open so as not to cut the wire.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Decoration Of Textiles (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Telephone Function (AREA)

Abstract

1. A process for the production of stripes or repeating crossbands on a circular knitting machine comprising at least two knitting heads fed with yarns having different appearances, characterized in that, by means of a respective device for selection of the needles associated with each knitting head, each band is started by changing the yarn in use by controlling, on the one hand, the selection device associated with the knitting head whose yarn is already in use in such a way that the needles cease from then on to gather the yarn at this knitting head and by controlling, on the other hand, the selection device associated with the other knitting head whose yarn is not yet in use in such a way that the needles from then on gather the yarn at this knitting head ; the complementary operations being effected at the end of a subsequent band after a whole multiple of revolutions of the cylinders of the machine.

Description

Quand on veut obtenir des rayures transversales sur des articles de bonneterie tricotés sur métier circulaire, on utilise en général le système rayeur qui existe pratiquement sur tous les métiers à tricoter circulaires.When one wants to obtain transverse stripes on knitted or crocheted articles on circular looms, one generally uses the striping system which exists practically on all circular knitting looms.

Avec un tel système, le changement de fils (ou de couleurs) s'opère à une même chute, par une manoeuvre combinée et synchronisée de présentation du jeteur amenant le nouveau fil et de retrait du jeteur de l'ancien fil.With such a system, the change of threads (or colors) takes place at the same fall, by a combined and synchronized maneuver of presentation of the thrower bringing the new thread and withdrawal of the thrower from the old thread.

Mais il y a alors obligatoirement un chevauchement des deux fils différents sur quelques aiguilles, sur lesquelles les deux fils se tricotent simultanément. De plus, des ciseaux appropriés sont actionnés à des moments bien précis, l'un pour lâcher l'extrémité du nouveau fil qui doit être tricoté, l'autre pour couper et pincer l'extrémité du fil qui se retire. Les bouts libres de ces deux fils sont alors incontrôlés et se placent dans les aiguilles dans des positions quelconques.But there is then necessarily an overlap of the two different threads on a few needles, on which the two threads are knitted simultaneously. In addition, suitable scissors are activated at very precise times, one to drop the end of the new thread which must be knitted, the other to cut and pinch the end of the thread which is withdrawn. The free ends of these two threads are then uncontrolled and are placed in the needles in any positions.

Sur le tricot, le changement de fils conduit à une surépaisseur sur quelques aiguilles, à un mélange irrégulier des fils de couleurs différentes sur les quelques aiguilles sur lesquelles s'opère le chevauchement et à l'existence de bouts de fils libres risquant d'émerger du tricot d'une façon fort inesthétique.On knitting, the change of thread leads to an oversize on some needles, to an irregular mixture tie threads of different colors on the few needles on which the overlap takes place and the existence of loose ends of threads which risk emerging from knitting in a very unsightly manner.

En outre, cette opération de changement de jeteurs, quelque peu délicate, demande un contrôle et un entretien constants des ciseaux coupe-fils et nécessite un ralentissement de la vitesse de tricotage pendant les changements.In addition, this somewhat delicate thrower change operation requires constant control and maintenance of the thread scissors and requires slowing down the knitting speed during the changes.

L'invention vise à éviter ces divers inconvénients. En utilisant un métier à tricoter circulaire multichutes, capable de tricoter en jersey ou en contextures dérivées, par exemple en mailles chargées ou Jacquard, elle permet de tricoter des rayures ou bandes transversales répétitives, de hauteurs quelconques qui s'étendent sur toute la périphérie de l'article, sans couper les fils à chaque changement. Pour cela, selon l'invention, on alimente en permanence chacune des chutes avec un fil bien déterminé de manière qu'à chaque chute un fil soit en travail ou prêt à entrer en travail, tandis qu'au moyen d'un dispositif de sélection des aiguilles associé à chacune des chutes, on commence chaque bande par changement du fil en travail en commandant d'une part le dispositif de sélection de la chute dont le fil est encore en travail, de manière que les aiguilles cessent désormais de cueillir le fil à cette chute et, d'autre part, le dispositif de sélection associé à l'autre chute dont le fil n'était pas en travail jusqu'alors, de manière que les aiguilles cueillent désormais le fil à cette chute ; les opérations inverses étant effectuées à la fin d'une bande après un multiple entier de tours des cylindres du métier.The invention aims to avoid these various drawbacks. By using a multi-drop circular knitting loom, capable of knitting in jersey or in derivative textures, for example in charged stitches or Jacquard, it makes it possible to knit repetitive stripes or transverse bands, of any height which extend over the entire periphery of the article, without cutting the threads at each change. For this, according to the invention, each of the scraps is permanently supplied with a well-defined wire so that, at each drop, a wire is in work or ready to go into work, while by means of a selection device needles associated with each of the scraps, each strip is started by changing the working thread by controlling on the one hand the device for selecting the scraps whose thread is still in work, so that the needles now stop picking the thread at this fall and, on the other hand, the selection device associated with the other fall, the thread of which had not been in use until then, so that the needles now pick the thread at this fall; the reverse operations being carried out at the end of a strip after an integer multiple of turns of the looms.

Ce procédé,qui permet d'obtenir des bandes ayant une hauteur quelconque dans le sens des colonnes de mailles a l'avantage qu'il y a maillage continu des fils aux endroits de transition. De plus le fil mis hors travail n'est pas coupé et s'étend simplement sur l'envers du tricot jusqu'à la zone suivante du tricot où il est repris pour travailler à nouveau.This method, which makes it possible to obtain strips having any height in the direction of the mesh columns has the advantage that there is a continuous mesh of the wires at transition places. In addition, the yarn put out of work is not cut and simply extends on the wrong side of the knit to the next area of the knit where it is taken up to work again.

En généralisant la définition du procédé, on peut dire qu'avec un métier comportant un nombre de chutes égal à k.n., l'invention permet de tricoter n bandes d'aspect différent, avec pour chaque bande, k chutes travaillant en même temps.By generalizing the definition of the process, it can be said that with a loom comprising a number of scraps equal to k.n., the invention makes it possible to knit n strips of different appearance, with for each strip, k scraps working at the same time.

On peut d'ailleurs prévoir un changement du jeteur de fil associé à une même chute pour augmenter la capacité de cette chute dans la mise en oeuvre de fils d'aspect différent.It is also possible to provide for a change of the thread thrower associated with the same drop to increase the capacity of this drop in the use of threads of different appearance.

L'invention s'étend également aux métiers circulaires multichutes adaptés pour la mise en oeuvre du procédé. Ces métiers, comportant au moins deux chutes alimentées en fils différents et un dispositif de cames de sélection des aiguilles qui doivent travailler à une chute pendant chaque tour des cylindres du métier et de celles qui doivent au contraire rester inactives, sont caractérisés en ce que les moyens commandant ces dispositifs de sélection sont agencés de manière que la commande ait lieu au bout d'un multiple entier de tours des cylindres du métier.The invention also extends to multi-fall circular looms suitable for implementing the method. These looms, comprising at least two scraps supplied with different threads and a device for selecting needles which must work at a drop during each revolution of the loom cylinders and those which must on the contrary remain inactive, are characterized in that the means controlling these selection devices are arranged so that the control takes place after an integer multiple of turns of the looms of the loom.

L'invention s'étend aussi aux articles de bonneterie obtenus tels que vêtements, bas, chaussettes, etc...The invention also extends to knitted articles obtained such as clothing, stockings, socks, etc.

Ces articles, comportant une ou plusieurs bandes circulaires en fils d'aspect différent s'étendant sur toute la périphérie de l'article, sont caractérisés en ce que la liaison du fil d'une bande au fil différent de la zone adjacente de l'article est un maillage continu.These articles, comprising one or more circular bands of wires of different appearance extending over the entire periphery of the article, are characterized in that the bonding of the wire from one band to the wire different from the adjacent zone of the article is a continuous mesh.

La description qui va suivre en regard du dessin annexé, donné à titre d'exemple non limitatif, fera bien comprendre comment l'invention peut être réalisée, les particularités qui ressortent tant du dessin que du texte faisant bien entendu partie de ladite invention.The description which will follow with regard to the appended drawing, given by way of nonlimiting example, will make it clear how the invention can be implemented, the features which emerge both from the drawing and from the text, of course, forming part of the said invention.

La figure 1 est un schéma montrant quelques rangées de mailles à grande échelle et destiné à faire comprendre le principe de l'invention. La figure 2 illustre une variante. La figure 3 représente lt'évolution du ou des fils des chutes annulées pendant que s'effectue le tricotage sur une autre chute. La figure 4 est une vue schématique d'une réalisation de la commande de cames de sélection des aiguilles, adaptable par exemple sur métier circulaire double cylindre dépourvu de système Jacquard. L'ensemble des figures 5a à 5d montre le garnissage des platines d'aiguilles sur le cylindre inférieur du métier pour une commande des cames de sélection selon la disposition illustrée par la figure 4. Ces figures portent des légendes qui en.facilitent la compréhension. La figure 6 est une vue schématique en perspective d'un métier circulaire équipé d'un dispositif de changement de jeteur de fil.Figure 1 is a diagram showing a few rows of meshes on a large scale and intended to explain the principle of the invention. Figure 2 illustrates a variant. FIG. 3 represents the evolution of the yarn or yarns of the canceled scraps while knitting takes place on another scrap. Figure 4 is a schematic view of an embodiment of the control of needle selection cams, adaptable for example on circular double cylinder loom without Jacquard system. The assembly of FIGS. 5a to 5d shows the lining of the needle plates on the lower cylinder of the loom for controlling the selection cams according to the arrangement illustrated in FIG. 4. These figures bear legends which make it easier to understand. Figure 6 is a schematic perspective view of a circular loom equipped with a thread thrower change device.

La figure 1 montre, en contexture jersey, sur le plan du principe, une succession de rangées de mailles, à l'endroit précis où s'opèrent les changements de fils :

  • - un fil "f1" d'une certaine couleur réalisant la rayure ou le bandeau "R1" est alimenté à la première chute du métier ;
  • - un fil "f2" d'une autre couleur réalisant la rayure ou le bandeau "R2" est alimenté à la deuxième chute.
Figure 1 shows, in jersey context, on the principle plan, a succession of rows of stitches, at the precise place where the thread changes take place:
  • - a wire "f1" of a certain color producing the stripe or the strip "R1" is supplied at the first fall of the loom;
  • - a "f2" thread of another color producing the stripe or the "R2" strip is supplied at the second fall.

On peut, bien entendu, imaginer un troisième fil encore, réalisant une autre rayure et alimenté à la troisième chute, etc...We can, of course, imagine a third thread again, making another stripe and fed at the third fall, etc ...

A la première chute où commence le tricot de la bande ou rayure "R1", le dispositif de sélection des aiguilles associé à cette première chute amorce la montée de toutes les aiguilles en commençant par l'aiguille de la colonne de mailles "M", puis les amène en ascension complète pour que toutes les aiguilles cueillent le fil "fl", le cueillage étant suivi d'un abattage normal. (Pour bien comprendre le dessin, il faut se souvenir que le tricot descend dans le métier, au fur et à mesure de sa confection, de sorte que les rangées de mailles faites les premières sont en bas de la figure 1).At the first fall where knitting of the strip or stripe "R1" begins, the needle selection device associated with this first fall initiates the rise of all the needles, starting with the needle of the column of stitches "M", then brings them in full ascent so that all the needles pick the thread "fl", the picking being followed by a normal slaughter. (To fully understand the design, it must be remembered that knitting descends in the loom, as it is made, so that the rows of stitches made first are at the bottom of Figure 1).

Pendant tout le tricotage de la rayure "R1" (avec un nombre quelconque de rangées) les autres chutes suivantes sont annulées, de sorte que les aiguilles se présentent à ces chutes en position d'abattage complet, de façon à ce qu'elles ne cueillent pas les fils respectifs, dont les jeteurs correspondants restent toujours en position de travail.During the entire knitting of the stripe "R1" (with any number of rows) the other following falls are canceled, so that the needles appear at these falls in the fully slaughtered position, so that they do not do not pick the respective threads, the corresponding throwers of which always remain in the working position.

Pour arrêter la rayure "R1" après un nombre entier de tours de cylindre, le dispositif de sélection de la première chute empêche l'ascension, vers la position de cueillage du fil, de toutes les aiguilles qui suivent la dernière aiguille devant cueillir dans la colonne de mailles "N". Dès lors, les aiguilles suivantes passeront à la première chute en position basse d'abattage complet, sans plus cueillir le fil "f1", dont le jeteur reste cependant fixe en position et prêt au travail.To stop the scratch "R1" after a whole number of cylinder turns, the device for selecting the first fall prevents the ascent, towards the wire picking position, of all the needles which follow the last needle to be picked in the column of meshes "N". Consequently, the following needles will pass to the first fall in the low position of complete slaughter, without further picking the thread "f1", the thrower of which however remains fixed in position and ready for work.

Pour enchaîner avec le tricotage de la rayure "R2", les aiguilles, qui viennent toutes d'arrêter le cueillage à la première chute, se présentent maintenant au dispositif de sélection de la deuxième chute, dont la came, qui vient d'être placée en position de travail, amorce leur montée en commençant toujours par l'aiguille de la colonne de mailles "M", puis les aiguilles sont amenées en ascension complète pour y cueillir le fil "f2", cueillage suivi d'un abattage normal.To continue with the knitting of the stripe "R2", the needles, which all come to stop the picking at the first fall, are now presented to the device for selecting the second fall, including the cam, which has just been placed in working position, initiate their Ascent always starting with the needle of the column of meshes "M", then the needles are brought in full ascent to pick the wire "f2" there, culling followed by a normal felling.

Pendant tout le tricotage de la bande ou rayure "R2", toutes les autres chutes sont annulées, de sorte que toutes les aiguilles s'y présentent en position basse d'abattage complet, sans y cueillir le fil.During all the knitting of the strip or stripe "R2", all the other falls are canceled, so that all the needles are there in the low position of complete felling, without picking the thread there.

L'arrêt de la rayure "R2" s'opère sur l'aiguille de la colonne de mailles "N", comme décrit précédemment pour la rayure "RI".The stripe "R2" is stopped on the needle of the mesh column "N", as described above for the stripe "RI".

On peut enchaîner de la même façon avec tout autre fil alimenté à la troisième chute s'il y en a une, et ainsi de suite jusqu'à la nième chute.We can chain in the same way with any other wire supplied at the third fall if there is one, and so on until the n th fall.

Comme les fils ne sont pas coupés lors du changement d'une rayure à l'autre, un fil flotté "ff" existe sur la face envers du tricot, reliant dans le sens longitudinal deux rayures ou bandeaux de même couleur.As the threads are not cut when changing from one stripe to another, a float thread "ff" exists on the reverse side of the knitted fabric, connecting two stripes or bands of the same color in the longitudinal direction.

La dernière aiguille ayant maillé (sur la colonne de mailles "N") entraîne ce fil dans son déplacement sur la circonférence du cylindre, sans qu'il y rencontre d'obstacle puisque toutes les aiguilles tricotent en jersey et se trouvent en position basse d'abattage complet.The last needle having meshed (on the column of meshes "N") drives this thread in its displacement on the circumference of the cylinder, without there meeting any obstacle since all the needles knit in jersey and are in low position d complete slaughter.

Le fil, ainsi entraîné, (f2, figure 3), balaye donc la surface au-dessus du cylindre inférieur (ou l'espace libre entre cylindres supérieur et inférieur, s'il s'agit d'un métier double cylindre) en formant une sécante de longueur croissante à partir de l'oeillet du jeteur j2 jusqu'au point diamétralement opposé à la chute qui vient d'être annulé. Pour la deuxième moitié de la rotation du cylindre, la sécante du fil allant en diminuant, il est nécessaire d'absorber à chaque tour de cylindre l'excédent de fil en le rappelant en sens inverse à travers le jeteur. On peut utiliser pour cela un dispositif additionnel "à pêcheur" P (voir figure 3), installé à chacune des chutes. Ce dispositif, semblable à celui que les constructeurs montent sur les métiers à tricoter des articles chaussants, pour le tricotage des talons et pointes en mouvement alternatif, ou sur les tricoteuses rectilignes pour absorber les excédents de fil après chaque fin de course du chariot, comporte un guide-fil P1 monté sur un levier P pivotant autour d'un axe P2 et rappelé par un ressort P3. Le levier P tiré par le ressort compense le mou qui se produit dans le fil et le maintient tendu.The wire, thus entrained, (f2, figure 3), therefore sweeps the surface above the lower cylinder (or the free space between upper and lower cylinders, if it is a double cylinder loom) by forming a secant of increasing length from the eyelet of the j2 j2 to the point diametrically opposite to the fall which has just been canceled. For the second half of the cylinder rotation, the secant of the wire decreasing, it is necessary to absorb each cylinder turn excess wire by pulling it back in the opposite direction through the thrower. An additional "fisherman" device P (see FIG. 3) can be used for this, installed at each fall. This device, similar to that which manufacturers build on knitting machines for footwear, for knitting heels and toes in reciprocating motion, or on straight knitters to absorb excess yarn after each end of travel of the carriage, comprises a wire guide P1 mounted on a lever P pivoting about an axis P2 and returned by a spring P3. The lever P pulled by the spring compensates for the slack that occurs in the wire and keeps it taut.

La sélection des aiguilles devant tricoter à l'une ou à l'autre chute s'effectue par l'action d'une came mobile disposée à chacune des chutes et agissant sur les talons de tricotage des platines.The selection of the needles to knit at one or the other fall is effected by the action of a movable cam disposed at each of the falls and acting on the knitting heels of the plates.

La mise en position de fonctionnement et le retrait de ces cames peuvent être commandés par un ensemble de leviers recevant leurs mouvements à partir d'excentriques ou de cames tournant en synchronisme avec le mouvement du métier, ou par une commande électro-magnétique.The placing in the operating position and the withdrawal of these cams can be controlled by a set of levers receiving their movements from eccentrics or from cams rotating in synchronism with the movement of the loom, or by an electromagnetic control.

Sur métier à tricoter circulaire Jacquard, la sélection des aiguilles devant cueillir le fil à l'une ou l'autre chute s'opère à partir des tambours à dessin et des sélecteurs appropriés.On a Jacquard circular knitting loom, the selection of needles to pick the thread at one or the other fall is made from drawing drums and appropriate selectors.

Sur métier circulaire double cylindre dépourvu du système Jacquard, le dispositif de sélection des aiguilles est composé de deux cames, mobiles dans le sens radial et pouvant se rapprocher ou s'éloigner du cylindre à aiguilles.On a double cylinder circular loom without the Jacquard system, the needle selection device is composed of two cams, movable in the radial direction and able to approach or move away from the needle cylinder.

L'une des cames (que l'on appellera "verrou de cueillage V1"), lorsqu'elle est rapprochée du cylindre, amorce l'ascension des aiguilles pour permettre le cueillage du fil ; l'entrée en fonction de cette came se fait sur les talons moyens de tricotage "Tt".One of the cams (which will be called "picking bolt V1"), when it is brought closer to the cylinder, initiates the ascent of the needles to allow the picking of the wire; the entry into function of this cam is done on the medium knitting heels "Tt".

L'autre came (que l'on appellera "verrou d'annulation V2"), lorsqu'elle est rapprochée du cylindre, amorce l'annulation de la chute en abaissant toutes les aiguilles en position de non-cueillage ; l'entrée en fonction de cette came se fait sur les grands talons de transfert "Tf".The other cam (which will be called "cancellation lock V2"), when it is brought closer to the cylinder, initiates the cancellation of the fall by lowering all the needles to the non-picking position; the entry into function of this cam is on the large transfer heels "Tf".

A titre indicatif et non limitatif, la figure 4 montre schématiquement une réalisation d'un tel dispositif de commande de sélection des aiguilles, adaptable par exemple sur un métier circulaire double cylindre, dépourvu de système Jacquard.By way of non-limiting indication, FIG. 4 schematically shows an embodiment of such a device for controlling the selection of needles, adaptable for example to a double cylinder circular loom, devoid of the Jacquard system.

Sur cette figure, Z1 et Z2 représentent respectivement les cylindres inférieur et supérieur du métier.In this figure, Z1 and Z2 respectively represent the lower and upper cylinders of the loom.

Le verrou de cueillage "V1", lorsqu'il est avancé vers le cylindre à aiguilles, présente sa rampe inclinée face au trajet des talons de tricotage "Tt" des platines 1 qui coopèrent, comme connu, avec les aiguilles 2 du type à double crochet.The picking lock "V1", when advanced towards the needle cylinder, has its inclined ramp facing the path of the knitting heels "Tt" of the plates 1 which cooperate, as known, with the needles 2 of the double type hook.

La fonction de cette came est d'amorcer et de poursuivre le tricotage d'une rayure sur la chute du métier à laquelle elle est associée. Elle est représentée sur la figure 4 en position enfoncée radialement, c'est-à-dire dans la position de travail où les talons de tricotage "Tt" des platines sont obligés de gravir la rampe inclinée par rapport à l'horizontale.The function of this cam is to initiate and continue knitting a stripe on the fall of the loom with which it is associated. It is shown in Figure 4 in the radially depressed position, that is to say in the working position where the knitting heels "Tt" of the plates are forced to climb the ramp inclined relative to the horizontal.

Quant au verrou d'annulation V2, lorsque celui-ci est avancé vers le cylindre à aiguilles, il présente sa rampe inclinée face au trajet des talons de transfert "Tf" des platines 1. Cette rampe, inversée par rapport à celle de la came de sélection VI, a pour but d'annuler la chute considérée, toujours à partir de la même aiguille, en abaissant les aiguilles, à cette chute, en position basse de non cueillage du fil.As for the cancellation lock V2, when this is advanced towards the needle cylinder, it has its inclined ramp facing the path of the transfer heels "Tf" of the plates 1. This ramp, inverted with respect to that of the selection cam VI, aims to cancel the drop considered, always from the same needle, by lowering the needles, at this fall, in the low position of no picking of the wire.

Sur la figure 4, cette came V2 est représentée dans sa position d'écartement radial maximum, de sorte qu'elle est sans action.In FIG. 4, this cam V2 is shown in its position of maximum radial spacing, so that it has no action.

La commande des cames est programmée par des disques 3 entraînés en rotation d'une façon continue, en synchronisme avec la rotation des cylindres Z1 et Z2 , et sur lesquels sont disposés des bossages ou cames 4 avec lesquels coopèrent des leviers-tâteurs 5.The control of the cams is programmed by discs 3 driven in rotation in a continuous manner, in synchronism with the rotation of the cylinders Z1 and Z2, and on which are arranged bosses or cams 4 with which the feeler levers 5 cooperate.

Quand un levier-tâteur se trouve dans un creux entre deux bossages, la came de sélection correspondante est écartée du cylindre, donc hors d'action.When a feeler lever is in a hollow between two bosses, the corresponding selection cam is moved away from the cylinder, therefore out of action.

Au contraire, le passage d'un bossage sous un levier-tâteur 5 soulève ce levier qui, à son tour, actionne la tige de commande verticale 6.On the contrary, the passage of a boss under a feeler lever 5 raises this lever which, in turn, actuates the vertical control rod 6.

Par l'intermédiaire d'une bielle de liaison 7, le mouvement est transmis à la botte 8 située en bout de la tige radiale de support 9 de la came V1 ou de la came V2.Via a connecting rod 7, the movement is transmitted to the boot 8 located at the end of the radial support rod 9 of the cam V1 or of the cam V2.

Un ressort 10, disposé dans la boite 8, rend la liaison élastique pour permettre à la came d'entrer en action en deux temps. Dans un premier temps, la came frotte sur les talons les plus petits des platines, comme on le voit par exemple sur la figure 5a pour la came V1, et dans un deuxième temps la came se trouve en position complètement enfoncée après le passage des talons moyens de tricotage (came V1 sur la figure 5a)ou des grands talons de transfert (came V2 sur la figure 5b).A spring 10, placed in the box 8, makes the elastic connection to allow the cam to come into action in two stages. Firstly, the cam rubs on the smallest heels of the plates, as seen for example in FIG. 5a for the cam V1, and secondly the cam is in the fully depressed position after the passage of the heels knitting means (cam V1 in Figure 5a) or large transfer heels (cam V2 in Figure 5b).

Des ressorts 11 et 12, agissant respectivement sur les tiges 9 et 6, servent à ramener tous les organes en position de départ dès que l'action d'un bossage 4 sur un levier-tâteur 5 cesse.Springs 11 and 12, acting respectively on the rods 9 and 6 are used to bring all the members back to the starting position as soon as the action of a boss 4 on a feeler lever 5 ceases.

Les figures 5a et 5b permettent une meilleure description de l'enchaînement des opérations successives de commande des cames de sélection, en supposant que le métier, comportant deux chutes munies chacune d'une came V1 et d'une came V2, soit utilisé pour tricoter une chaussette.Figures 5a and 5b provide a better description of the sequence of successive operations for controlling the selection cams, assuming that the loom, comprising two falls each provided with a cam V1 and a cam V2, is used for knitting a sock.

La figure 5a représente une coupe du cylindre inférieur Z1, au niveau des talons de tricotage Tt des platines 1.FIG. 5a represents a section of the lower cylinder Z1, at the level of the knitting heels Tt of the plates 1.

Pour que le changement du fil tricoté s'effectue sur la face arrière de la chaussette, la sélection des aiguilles doit se faire au milieu de la zone des petits talons de tricotage. L'emplacement des aiguilles "M" et "N",dont il a été question en regard de la figure 1, est représenté sur les figures 5a et 5b. Le cylindre tournant dans le sens contraire à celui des aiguilles d'une montre, l'aiguille "N" et les quelques aiguilles qui suivent sont munies de platines avec moyen talon de tricotage pour permettre l'entrée en travail de la came de sélection V1.In order for the change of the knitted yarn to take place on the rear side of the sock, the selection of needles must be made in the middle of the area of the small knitting heels. The location of the needles "M" and "N", which has been discussed with reference to Figure 1, is shown in Figures 5a and 5b. The cylinder rotating counterclockwise, the needle "N" and the few needles which follow are provided with plates with medium knitting heel to allow entry into work of the selection cam V1 .

Pour le démarrage de la rayure "R1" à la première chute, la came "V1" est poussée en position de travail. Après avoir frotté sur quelques petits talons de tricotage, elle attaque les quelques moyens talons de tricotage à partir de l'aiguille "M" pour amorcer l'ascension des aiguilles qui vont cueillir le fil à la première chute. Le passage des quelques moyens talons après l'aiguille "M" permet à la came V1 de rentrer complètement contre le cylindre Z1 et ainsi toutes les aiguilles sur tout le pourtour du cylindre vont amorcer l'ascension pour le cueillage du fil pendant un nombre entier de tours de cylindre.To start the stripe "R1" at the first fall, the cam "V1" is pushed into the working position. After having rubbed on a few small knitting heels, it attacks the few medium knitting heels from the needle "M" to initiate the ascent of the needles which will pick the thread at the first fall. The passage of the few heel means after the needle "M" allows the cam V1 to enter completely against the cylinder Z1 and thus all the needles around the entire periphery of the cylinder will initiate the ascent for the picking of the wire for a whole number cylinder turns.

Bien entendu, toutes les autres chutes amenant des fils différents sont annulées, comme on le voit par exemple pour la came VI de la deuxième chute.Of course, all the other falls bringing different wires are canceled, as seen for example for the cam VI of the second fall.

La figure 5b représente une coupe du cylindre inférieur Z1, au niveau des talons de transfert Tf des platines d'aiguilles.FIG. 5b represents a section of the lower cylinder Z1, at the level of the transfer heels Tf of the needle plates.

Pour arrêter la rayure "RI" à la première chute sur l'aiguille "N" après un nombre entier de tours des cylindres Z1 et Z2, comme on l'a dit en regard de la figure 1, l'aiguille "M" et les quelques aiguilles qui suivent sont munies de platines avec grands talons de transfert.To stop the scratch "RI" at the first fall on the needle "N" after a whole number of revolutions of the cylinders Z1 and Z2, as we have said with regard to FIG. 1, the needle "M" and the next few needles are fitted with plates with large transfer heels.

Au cours du dernier tour de tricotage de la rayure "RI", la came V2 de la première chute est poussée vers le cylindre (figure 5b) et elle frotte sur les talons moyens de transfert qui garnissent la presque totalité du pourtour du cylindre. Dès que se présentent les grands talons à partir de l'aiguille "M" ils sont pris par la came V2 et sont abaissés vers la position d'annulation pour empêcher les aiguilles de cueillir le fil au jeteur. De plus le passage des quelques grands talons après l'aiguille "M" permet à ladite came "V2" de la première chute de rentrer complètement contre le cylindre et ainsi toutes les aiguilles sont progressivement amenées en position d'annulation. L'aiguille "N" est donc bien la dernière qui a cueilli le fil à la première chute.During the last knitting round of the stripe "RI", the cam V2 of the first fall is pushed towards the cylinder (FIG. 5b) and it rubs on the transfer heels which fill almost the entire periphery of the cylinder. As soon as the large heels appear from the needle "M" they are taken by the cam V2 and are lowered towards the cancellation position to prevent the needles from picking up the thread at the thrower. In addition, the passage of the few large heels after the needle "M" allows said cam "V2" of the first fall to come completely against the cylinder and thus all the needles are gradually brought into the cancellation position. The needle "N" is therefore the last one which picked the thread at the first fall.

Dès que le talon de tricotage de l'aiguille N a atteint au moins le point culminant de la came V1, et que la came V2 se trouve en position complètement enfoncée contre le cylindre, on peut écarter la came V1 de la première chute pour la mettre hors d'action.As soon as the knitting heel of the needle N has reached at least the highest point of the cam V1, and the cam V2 is in the fully pressed position against the cylinder, the cam V1 can be moved away from the first fall for the put out of action.

Aussitôt après l'annulation complète de la came V1, on peut procéder au retrait de la came V2, ce qui annule complètement la première chute.Immediately after the complete cancellation of the V1 cam, the V2 cam can be removed, which cancels completely the first fall.

Bien entendu, pendant ce processus, toutes les autres cames "V2" sur les autres chutes qui amènent des fils différents restent en position écartée du cylindre.Of course, during this process, all the other cams "V2" on the other falls which bring different wires remain in the position separated from the cylinder.

L'invention présente divers avantages.The invention has various advantages.

En particulier, lorsqu'on réalise des rayures répétitives transversales sur un tricot tubulaire en contexture jersey ou mailles fantaisie dérivées du jersey, par exemple mailles chargées ou Jacquard, l'invention permet de ne plus couper les fils à chaque changement de rayures.In particular, when repetitive transverse stripes are produced on a tubular knitted fabric in jersey or fancy stitches derived from jersey, for example charged or Jacquard stitches, the invention makes it possible to no longer cut the threads at each change of stripes.

D'autre part, comme le changement de rayures se fait sans chevauchement du nouveau fil qui démarre et de l'ancien fil qui se retire, il n'y a plus de surépaisseur du tricot sur quelques aiguilles, ni mélange irrégulier et inesthétique de ces deux fils. Il en résulte une délimitation très nette et franche entre deux rayures successives.On the other hand, as the change of stripes is done without overlapping of the new thread which starts and the old thread which withdraws, there is no longer any excess thickness of the knitting on some needles, nor irregular and unsightly mixing of these two sons. This results in a very clear and frank delimitation between two successive stripes.

Les fils respectifs des différentes rayures n'étant plus coupés, aucun bout de fil libre n'émerge plus sur la face endroit du tricot à l'emplacement des changements, d'où amélioration très nette de l'aspect esthétique du tricot.As the respective threads of the different stripes are no longer cut, no free end of thread emerges on the right side of the knit at the location of the changes, hence a marked improvement in the aesthetic appearance of the knit.

En outre, les changements de rayures s'opèrent sans aucun ralentissement de la vitesse du métier à tricoter.In addition, the changes of stripes take place without any slowing down of the speed of the knitting machine.

Les ciseaux coupe-fils des appareils rayeurs n"étant plus sollicités pour ces changements de rayures répétitives, il y a moindre usure et réduction de la fréquence des incidents éventuels avec ces appareils.Since the wire cutter scissors of the scratching devices are no longer used for these repetitive scratching changes, there is less wear and reduction in the frequency of possible incidents with these devices.

A titre de variante, au lieu de démarrer une rayure sur l'aiguille d'une certaine colonne de mailles "Mn et d'arrêter cette rayure sur l'aiguille de la colonne de mailles "N" précédente (figure 1), il est aussi possible d'opérer démarrage et arrêt sur la même aiguille de la colonne de mailles MI, comme représenté sur la figure 2.As a variant, instead of starting a scratch on the needle of a certain column of stitches "M n and of stopping this scratch on the needle of the column of meshes "N" above (FIG. 1), it is also possible to operate start and stop on the same needle of the column of meshes M I , as shown in FIG. 2.

La contexture représentée sur la figure 1 fait ressortir qu'à chaque changement de rayures il y a absence de bride d'entremaille, aux endroits désignés par "T". De ce fait, suivant la qualité et la finesse des fils tricotés, l'entremaille a tendance à s'écarter quelque peu à ces endroits.The texture shown in Figure 1 shows that each change of scratches there is no intermediate flange, at the places designated by "T". Therefore, depending on the quality and fineness of the knitted threads, the interlining tends to deviate somewhat at these locations.

Le fait d'arrêter et de démarrer les rayures sur la même colonne de mailles M', selon le procédé représenté sur la figure 2, a pour effet de resserrer l'entremail- le aux changements de rayures et d'améliorer ainsi l'aspect esthétique du tricot.The fact of stopping and starting the scratches on the same column of meshes M ′, according to the method shown in FIG. 2, has the effect of tightening the web when the scratches change and thus improving the appearance aesthetics of knitting.

Dans une telle réalisation du procédé sur un métier double cylindre, le garnissage du cylindre inférieur "Z1" au niveau des talons de tricotage reste inchangé (voir figure 5c).In such an embodiment of the process on a double cylinder loom, the lining of the lower cylinder "Z1" at the knitting heels remains unchanged (see FIG. 5c).

Par contre, les quelques grands talons de transfert qui amorcent l'annulation de la chute commencent à partir de l'aiguille L' (voir figure 5d).On the other hand, the few large transfer heels that initiate the cancellation of the fall start from the needle L '(see Figure 5d).

Dans les modes de réalisation du procédé qui viennent d'être décrits, le principe de base consiste à faire les rayures transversales sans chevauchement de fils, ni raccords disgracieux, en alimentant en permanence un fil bien déterminé à chacune des différentes chutes. Mais cela a pour conséquence de limiter théoriquement le nombre possible de rayures différentes au nombre de chutes dont est doté le métier.In the embodiments of the method which have just been described, the basic principle consists in making the transverse stripes without overlapping of wires, or unsightly connections, by permanently feeding a well determined wire at each of the different falls. But this has the consequence of theoretically limiting the possible number of different scratches to the number of falls with which the loom is equipped.

Or il est connu de munir les métiers à tricoter de dispositifs rayeurs permettant de changer le jeteur de fil en travail, ce qui permet d'augmenter le nombre possible de rayures différentes.However, it is known to provide knitting looms with scratching devices enabling the thread thrower to be changed. in work, which increases the possible number of different scratches.

L'invention met à profit un tel dispositif en l'adaptant convenablement, de manière qu'il multiplie le nombre de rayures ou de bandes transversales différentes pouvant être effectuées à une même chute du métier et cela en conservant l'avantage de n'avoir ni chevauchement, ni coupe des fils aux changements de rayures, tout en assurant la liaison des fils par un maillage normal.The invention takes advantage of such a device by suitably adapting it, so that it multiplies the number of different stripes or transverse bands which can be carried out at the same fall from the loom, while retaining the advantage of neither overlapping, nor cutting of the threads at the changes of stripes, while ensuring the connection of the threads by a normal mesh.

La figure 6 montre le principe du fonctionnement avec changement de jeteurs à l'une des chutes.Figure 6 shows the principle of operation with change of throwers at one of the falls.

Le jeteur "J1", amenant le fil "f1", est en position de travail à cette chute et les aiguilles cueillent ce fil dans les conditions déjà décrites.The thrower "J1", bringing the thread "f1", is in the working position at this fall and the needles pick this thread under the conditions already described.

Le jeteur J22, amenant le fil f22 à cette même chute, est en position de retrait (hors travail), mais un guide vertical "G" empêche le tronçon de fil reliant la dernière maille au jeteur J22 de pénétrer dans le ciseau "S". L'extrémité inférieure de ce guide présente une échancrure dans le sens de la marche pour empêcher le tronçon de fil d'échapper à la partie inférieure du guide.The thrower J 22 , bringing the wire f 22 to this same fall, is in the retracted position (out of work), but a vertical guide "G" prevents the section of wire connecting the last stitch to the thrower J 22 from entering the chisel "S". The lower end of this guide has a notch in the direction of travel to prevent the section of wire from escaping from the lower part of the guide.

Lorsqu'il y a lieu de changer l'aspect de la rayure sur la chute considérée, la permutation des jeteurs est effectuée pendant que cette chute ne travaille pas, c'est-à-dire pendant qu'on est en train de tricoter une rayure sur une autre chute. La permutation des jeteurs peut s'effectuer sans ralentissement de la marche du métier, car les aiguilles passent sans cueillage à cette chute annulée.When it is necessary to change the appearance of the stripe on the fall considered, the permutation of the throwers is carried out while this fall is not working, that is to say while one is knitting a scratch on another fall. The permutation of the throwers can be carried out without slowing down the progress of the loom, because the needles pass without picking at this canceled fall.

Lorsqu'il y a lieu de démarrer une nouvelle rayure à la chute considérée, le jeteur avec son fil correspondant se trouve déjà en position de travail au moment où la came de sélection V1 entre en action pour amorcer l'ascension des aiguilles.When it is necessary to start a new stripe at the fall considered, the thrower with its corresponding thread is already in the working position when the selection cam V1 comes into action to initiate the ascent of the needles.

A noter que le guide "G" est de préférence escamotable pour permettre de reprendre momentanément la fonction normale de l'appareil rayeur, par exemple sur métiers à tricoter les articles chaussants pour l'introduction et le retrait du fil élastique en bord-côte, ou du fil de renfort en talons et pointes.'Note that the guide "G" is preferably retractable to allow the normal function of the scraper device to be temporarily resumed, for example on knitting machines for footwear for the introduction and removal of the elastic thread at the ribbing, or reinforcing wire in heels and toes. '

Sur certains types de métiers le guide escamotable "G" peut être remplacé par une commande sélective de la manoeuvre des ciseaux ; ainsi, lorsqu'un jeteur se met hors travail, le fil se place normalement dans le ciseau, mais ce dernier reste ouvert pour ne pas couper le fil.On certain types of looms the retractable guide "G" can be replaced by a selective command of the operation of the scissors; thus, when a thrower goes out of work, the wire is normally placed in the chisel, but the latter remains open so as not to cut the wire.

Il va de soi que les modes de réalisation décrits ne sont que des exemples et qu'il serait possible de les modifier, notamment par substitution d'équivalents techniques, sans sortir pour cela du cadre de l'invention.It goes without saying that the embodiments described are only examples and that it would be possible to modify them, in particular by substitution of technical equivalents, without departing from the scope of the invention.

Claims (14)

1. Procédé de réalisation de rayures ou bandes transversales répétitives sur métier à tricoter circulaire comportant au moins deux chutes alimentées en fils ayant des aspects différents,
caractérisé en ce qu'au moyen d'un dispositif de sélection des aiguilles associé à chacune des chutes, on commence chaque bande par changement du fil en travail en commandant d'une part le dispositif de sélection de la chute dont le fil est encore en travail, de manière que les aiguilles cessent désormais de cueillir le fil à cette chute et, d'autre part, le dispositif de sélection associé à l'autre chute dont le fil n'était pas en travail jusqu' alors, de manière que les aiguilles cueillent désormais le fil à cette chute; les opérations inverses étant effectuées à la fin d'une bande après un multiple entier de tours des cylindres du métier.1. A method of producing repetitive stripes or transverse bands on a circular knitting machine comprising at least two scraps supplied with yarns having different aspects,
characterized in that by means of a needle selection device associated with each of the scraps, each strip is started by changing the working thread by controlling on the one hand the scoop selection device whose thread is still in work, so that the needles now stop picking the thread at this fall and, on the other hand, the selection device associated with the other fall whose thread was not in work until then, so that the needles now pick the thread at this fall; the reverse operations being carried out at the end of a strip after an integer multiple of turns of the looms. 2F, Procédé selon la revendication 1, caractérisé en ce que l'une des chutes au moins, alimentée avec un fil différent de celui des autres chutes, est associée
à au moins deux jeteurs de fils différents et en ce que l'on change le jeteur, sans coupure du fil, pendant une période où les aiguilles ne cueillent pas le fil à cette chute.2 F , Method according to claim 1, characterized in that at least one of the falls, supplied with a wire different from that of the other falls, is associated
to at least two different thread throwers and in that the thrower is changed, without cutting the thread, during a period when the needles do not pick the thread at this fall. 3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les temps de sélection des aiguilles sont choisis de manière que les tricotages des fils différents à deux chutes différentes, commencent dans une même colonne de mailles.3. Method according to claim 1 or 2, characterized in that the selection times of the needles are chosen so that the knitting of the different yarns at two different drops begins in the same column of stitches. 4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que les temps de sélection des aiguilles sont choisis de manière que les tricotages des fils différents s'arrêtent dans une même colonne de mailles qui précède la colonne où commencent les tricotages ou qui est la même.4. Method according to one of claims 1 to 3, characterized in that the selection times of the needles are chosen so that the knitting of the different threads stop in the same column of stitches which precedes the column where the knitting begins or who is the same. 5. Métier circulaire multichutes adapté pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 4 et comportant au moins deux chutes alimentées en fils différents ainsi qu'un dispositif de cames de sélection des aiguilles qui doivent travailler à une chute pendant chaque tour des cylindres du métier et de celles qui doivent au contraire rester inactives, ce dispositif étant à configuration variable commandée, caractérisé en ce que les moyens (3, 4, 5, Y1, Y2, figs. 4 et 5) commandant le changement de configuration sont agencés de manière que le changement intervienne au bout d'un multiple entier de tours des cylindres du métier.5. A multi-drop circular loom suitable for implementing the method according to any one of claims 1 to 4 and comprising at least two scraps supplied with different threads as well as a device for selecting cams for the needles which must work at a drop during each revolution of the cylinders of the loom and of those which must on the contrary remain inactive, this device being of controlled variable configuration, characterized in that the means (3, 4, 5, Y1, Y2, figs. 4 and 5) controlling the configuration changes are arranged so that the change occurs after an integer multiple of turns of the loom cylinders. 6. Métier circulaire multichutes selon la. revendication 5, caractérisé en ce que les cames (V1, V2, figs. 4 et 5) sont mobiles radialement pour se placer soit en dehors de la trajectoire des talons de commande des aiguilles (Tt, Tf), soit dans cette trajectoire afin de mouvoir les talons.6. Multi-fall circular loom according to the. claim 5, characterized in that the cams (V1, V2, figs. 4 and 5) are radially movable so as to be placed either outside the trajectory of the control heels of the hands (Tt, Tf), or in this trajectory in order to move the heels. 7. Métier circulaire multichutes et à double cylindre selon l'une des revendications 5 et 6, caractérisé en ce que chaque chute est associée à une première came mobile (V1) capable d'agir sur les talons de tricotage (Tt) pour mettre les aiguilles en travail à cette chute et à une seconde came mobile capable d'agir sur les talons de transfert (Tf) pour mettre les aiguilles hors travail à la chute considérée, les deux cames étant commandées avec des temps de succession déterminés, dans la rotation de tambours à bossages (3, 4) entraînés en synchronisme avec les cylindres.7. circular multi-drop and double cylinder loom according to one of claims 5 and 6, characterized in that each drop is associated with a first movable cam (V1) capable of acting on the knitting heels (Tt) to put the needles in work at this fall and a second mobile cam capable of acting on the transfer heels (Tf) to put the needles out of work at the fall considered, the two cams being controlled with determined succession times, in rotation bossed drums (3, 4) driven in synchronism with the cylinders. 8. Métier circulaire multichutes selon l'une des revendications 5 à 7, caractérisé par l'adjonction aux chutes d'un tendeur de fil (P1, fig.3) permettant d'absorber le mou du fil alimentant cette chute quand ce fil n'est pas tricotéo8. Multi-fall circular loom according to one of claims 5 to 7, characterized by the addition to the falls of a wire tensioner (P1, fig.3) allowing absorb the slack in the yarn feeding this fall when this yarn is not knitted 9. Métier circulaire multichutes selon l'une des revendications 5 à 8, caractérisé en ce qu'une même chute est associée à deux ou plusieurs jeteurs de fils (J1, J22, fig.6) différents substituables l'un à l'autre.9. Multi-fall circular loom according to one of claims 5 to 8, characterized in that the same fall is associated with two or more thread throwers (J1, J22, fig.6) different substitutable for one another . 10. Métier selon la revendication 9 avec ciseau coupe-fil associé aux jeteurs substituables, caractérisé en ce qu'un guide-fil (G, fig.6) fixe ou escamotable est prévu à côté de ce ciseau (S) pour éviter la coupe du fil.10. A loom according to claim 9 with a wire cutting chisel associated with the substitutable throwers, characterized in that a wire guide (G, fig.6) fixed or retractable is provided next to this chisel (S) to avoid cutting some thread. 11. Métier selon la revendication 9, avec ciseau coupe-fil associé aux jeteurs substituables, caractérisé en ce que ce ciseau est muni d'un dispositif de mise hors d'action.11. A loom according to claim 9, with a wire-cutting chisel associated with the substitutable throwers, characterized in that this chisel is provided with a deactivation device. 12'. A titre de produit nouveau, un article de bonneterie tricoté sur métier circulaire et présentant une ou plusieurs rayures ou bandes circulaires en fils d'aspects différents s'étendant chacune sur toute la périphérie de l'article, caractérisé en ce que la liaison du fil d'une bande au fil différent de la zone adjacente de l'article est un maillage continu (figs. 1 et 2).12 ' . As a new product, a knitted or crocheted item on a circular loom and having one or more stripes or circular bands in threads of different aspects, each extending over the entire periphery of the item, characterized in that the thread bonding a strip of wire different from the adjacent area of the article is a continuous mesh (figs. 1 and 2). 13. Produit selon la revendication 12, caractérisé en ce que d'une bande à une autre, tricotées avec le même fil, mais séparées par une bande de fil différent, le premier fil restant continu d'une bande à l'autre s'étend sur l'envers du tricot.13. Product according to claim 12, characterized in that from one strip to another, knitted with the same thread, but separated by a strip of different thread, the first thread remaining continuous from one strip to the other s' extends on the wrong side of the knit. 14. Produit selon la revendication 13, caractérisé en ce que sur l'envers du tricot le fil s'étend selon une ligne (ff, figs. 1 et 2) peu inclinée par rapport aux colonnes de mailles.14. Product according to claim 13, characterized in that on the reverse side of the knitted yarn extends along a line (ff, figs. 1 and 2) slightly inclined relative to the columns of stitches.
EP82401792A 1981-10-29 1982-10-01 Method of knitting stripes or repeating crossbands on a multisystem circular knitting machine, apparatus therefor and products obtained Expired - Lifetime EP0078720B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401792T ATE12268T1 (en) 1981-10-29 1982-10-01 METHOD OF KNITTING STRIPS OR CROSS REPEATING BANDS ON A MULTI-SYSTEM CIRCULAR KNITTING MACHINE; DEVICE FOR CARRYING OUT THIS PROCESS; PRODUCT MANUFACTURED ACCORDINGLY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8120298A FR2515705B1 (en) 1981-10-29 1981-10-29 METHOD FOR KNITTING STRIPES OR REPETITIVE CROSSBANDS ON MULTI-FALL CIRCULAR KNITTING MATERIAL, DEVICE FOR CARRYING OUT SAID METHOD AND PRODUCTS OBTAINED
FR8120298 1981-10-29

Publications (3)

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EP0078720A1 true EP0078720A1 (en) 1983-05-11
EP0078720B1 EP0078720B1 (en) 1985-03-20
EP0078720B2 EP0078720B2 (en) 1991-07-10

Family

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Application Number Title Priority Date Filing Date
EP82401792A Expired - Lifetime EP0078720B2 (en) 1981-10-29 1982-10-01 Method of knitting stripes or repeating crossbands on a multisystem circular knitting machine, apparatus therefor and products obtained

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EP (1) EP0078720B2 (en)
JP (1) JPS58126350A (en)
AT (1) ATE12268T1 (en)
DE (1) DE3262692D1 (en)
ES (1) ES516925A0 (en)
FR (1) FR2515705B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3033286A1 (en) * 2015-03-04 2016-09-09 Michelin & Cie PNEUMATIC COMPRISING A KNIT AND REINFORCING ELEMENTS

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541230A (en) * 1922-12-18 1925-06-09 Lombardi Vincent Enitting machine
GB308421A (en) * 1928-02-09 1929-03-28 Spiers William Ltd Improvements in or relating to circular knitting machines and the method of knittingfabrics thereon
GB342409A (en) * 1929-11-15 1931-02-05 Grieve & Co Ltd T Improvements in or relating to circular knitting machines
US2225842A (en) * 1938-04-12 1940-12-24 Scott & Williams Inc Circular knitting machine
US3975926A (en) * 1975-02-24 1976-08-24 Riccardo Tenconi Feed device for circular knitting machines of the type manufacturing open fabric

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541230A (en) * 1922-12-18 1925-06-09 Lombardi Vincent Enitting machine
GB308421A (en) * 1928-02-09 1929-03-28 Spiers William Ltd Improvements in or relating to circular knitting machines and the method of knittingfabrics thereon
GB342409A (en) * 1929-11-15 1931-02-05 Grieve & Co Ltd T Improvements in or relating to circular knitting machines
US2225842A (en) * 1938-04-12 1940-12-24 Scott & Williams Inc Circular knitting machine
US3975926A (en) * 1975-02-24 1976-08-24 Riccardo Tenconi Feed device for circular knitting machines of the type manufacturing open fabric

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3033286A1 (en) * 2015-03-04 2016-09-09 Michelin & Cie PNEUMATIC COMPRISING A KNIT AND REINFORCING ELEMENTS
WO2016139130A1 (en) * 2015-03-04 2016-09-09 Compagnie Generale Des Etablissements Michelin Tyre comprising a knitted fabric and reinforcing elements

Also Published As

Publication number Publication date
ATE12268T1 (en) 1985-04-15
EP0078720B2 (en) 1991-07-10
FR2515705B1 (en) 1985-06-07
EP0078720B1 (en) 1985-03-20
ES8307310A1 (en) 1983-06-16
FR2515705A1 (en) 1983-05-06
DE3262692D1 (en) 1985-04-25
ES516925A0 (en) 1983-06-16
JPS58126350A (en) 1983-07-27

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