EP0332146B1 - Process for putting under tension a synthetic cloth around a cylinder and tensioning apparatus for the application of the process - Google Patents

Process for putting under tension a synthetic cloth around a cylinder and tensioning apparatus for the application of the process Download PDF

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Publication number
EP0332146B1
EP0332146B1 EP89104015A EP89104015A EP0332146B1 EP 0332146 B1 EP0332146 B1 EP 0332146B1 EP 89104015 A EP89104015 A EP 89104015A EP 89104015 A EP89104015 A EP 89104015A EP 0332146 B1 EP0332146 B1 EP 0332146B1
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EP
European Patent Office
Prior art keywords
sheet
extremities
loops
sleeve
surrounded
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Expired - Lifetime
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EP89104015A
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German (de)
French (fr)
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EP0332146A1 (en
Inventor
Maurice Gauthier
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COFPA Compagnie des Feutres pour Papeteries et des Tissus Industriels SA
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COFPA Compagnie des Feutres pour Papeteries et des Tissus Industriels SA
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Priority to AT89104015T priority Critical patent/ATE78884T1/en
Publication of EP0332146A1 publication Critical patent/EP0332146A1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0054—Seams thereof

Definitions

  • the method according to the invention is characterized in that an open canvas made of synthetic threads is taken, terminated at its two ends by loops or spirals, said canvas comprising at least at one end several bands in synthetic yarns of small width, the length of which is equal to the width of the fabric, the said bands comprising loops or being constituted by spirals which are meshed in the loops or spirals of the neighboring bands and crossed by rods, each end being provided fastening elements regularly fixed along these ends, the said fabric is placed around said surface, the fastening elements are pulled strongly using a tensioning device, to bring the ends of the canvas one from the other, we remove at one end of the canvas one or more bands so that the canvas has just the length sufficient to surround the surface having substantially the desired tension, we loop the loops ending the fabric one inside the other to determine a locking channel, a rod is introduced into the locking channel, and the tensioning device is removed as well as fasteners.
  • the main application of the process of the invention relates to the laying of a covering around a cylinder but it can also be used to lay a stretched canvas around a surface which can be constituted by that which envelops several cylinders or several elements parallel to each other.
  • the method of laying a canvas 1 of synthetic son around a cylinder 2 comprises the following steps. Take a canvas 1 consisting of a strip, for example woven, terminated at its two ends 3 by series of loops 4; at the manufacturer, the ends 13 of straps 6 were sewn parallel to the ends 3 of the fabric 1, that is to say parallel to the axis of cylinder 2.

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  • Treatment Of Fiber Materials (AREA)
  • Paper (AREA)
  • Clamps And Clips (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Tents Or Canopies (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Sewing Machines And Sewing (AREA)
  • Electric Cable Installation (AREA)

Abstract

Process for installing, under tension, a cloth (1) around a surface (2): the cloth (1) is pretensioned around the surface and strips (14) are if necessary added to the ends (3) of the cloth (1), and the cloth (1) is joined up and the tension released. The tensioning device (5) has two straps (6) attachable to the ends (3) of the cloth and these are brought together by means of threaded rods (9) on which bolts (12) are screwed. <IMAGE>

Description

La présente invention a trait à un procédé de pose d'une toile en fils synthétiques avec une tension autour d'une surface à entourer en particulier d'un cylindre utilisé dans la fabrication du papier.The present invention relates to a method of laying a canvas of synthetic threads with a tension around a surface to be surrounded in particular by a cylinder used in the manufacture of paper.

Il est connu d'entourer des cylindres de toiles tubulaires avec tension ce qui nécessite de libérer l'une des extrémités du cylindre pour enfiler la toile. C'est une opération longue et délicate qui nécessite des équipements spéciaux et une configuration adaptée de l'environnement du cylindre (cantilever par exemple).It is known to surround cylinders of tubular fabrics with tension which requires releasing one of the ends of the cylinder to thread the fabric. It is a long and delicate operation which requires special equipment and a suitable configuration of the environment of the cylinder (cantilever for example).

Il est connu également d'entourer les cylindres par une toile tissée ouverte que l'on rend circulaire par jonctionnement par au moins un jonc des boucles formées à chacune des extrémités de la bande.It is also known to surround the cylinders with an open woven fabric which is made circular by joining by at least one ring of loops formed at each of the ends of the strip.

Si les éléments chaîne et trame de la toile ne sont pas orthogonaux par rapport à l'axe du cylindre, on peut rendre la toile solidaire de ce dernier en tirant sur les bords de cette toile, par des ressorts ou des frettes fixées sur les bords du cylindre. Dans le cas de frettes, on pince les bords de la toile entre les frettes de chaque côte du cylindre. Puis on écarte celles-ci des bords du cylindre à l'aide de vis fixées sur les frettes. Les efforts de traction exercés réduisent le diamètre de la toile et la plaquent sur le cylindre. C'est une opération compliquée et longue nécessitant des équipements spéciaux sur les bords du cylindre.If the warp and weft elements of the canvas are not orthogonal to the cylinder axis, the canvas can be made integral with the latter by pulling on the edges of this canvas, by springs or hoops fixed on the edges of the cylinder. In the case of frets, the edges of the fabric are clamped between the frets on each side of the cylinder. Then we move them away from the edges of the cylinder using screws fixed on the hoops. The tensile forces exerted reduce the diameter of the fabric and press it against the cylinder. It is a complicated and long operation requiring special equipment on the edges of the cylinder.

Si les éléments de chaîne et de trame de la toile sont orthogonaux par rapport à l'axe du cylindre, on utilise de préférence des matériaux synthétiques, rétractables à chaud pour les rendre solidaires du cylindre.If the warp and weft elements of the fabric are orthogonal to the axis of the cylinder, use is preferably made of synthetic materials, heat shrinkable to make them integral with the cylinder.

Il est connu aussi d'enrouler autour d'un cylindre une toile ouverte faite de spirales plastiques engrenées entre elles et de la fermer en engrenant les spirales des deux extrémités et en les verrouillant avec un jonc (voir par example US-A-3436041). Ces spirales sont faites d'un matériau plastique thermo-rétractable. On rend la toile solidaire du cylindre par traitement thermique. Pour l'opération de rétraction thermique d'une toile plastique tissée ou constituée de spirales, on utilise de l'air chaud, de la vapeur ou de l'eau chaude.It is also known to wrap an open canvas made of plastic spirals meshed between them around a cylinder and to close it by meshing the spirals at both ends and locking them with a rod (see for example US-A-3436041) . These spirals are made of a heat-shrinkable plastic material. We make the canvas united of the cylinder by heat treatment. Hot air, steam or hot water are used for the thermal shrinking operation of a woven plastic fabric or a fabric made of spirals.

Cette technique et aussi délicate à utiliser car nécessite l'emploi d'une source chaude. D'autre part, la rétraction n'est pas toujours suffisante pour bien tenir la toile sur le cylindre.This technique is also delicate to use because it requires the use of a hot spring. On the other hand, the retraction is not always sufficient to properly hold the canvas on the cylinder.

En outre, elle ne permet pas l'emploi de fils à retrait faible ou nul.In addition, it does not allow the use of wires with little or no shrinkage.

Le procédé de pose d'une toile en fils synthétiques avec tension autour d'une surface à entourer, selon la présente invention, est plus aisé à mettre en oeuvre que ceux rappellés ci-dessus et est caractérisé en ce qu'on prend une toile ouverte terminée à ses deux extrémités par des moyens de jonctionnement, et munie à ces extrémités d'éléments d'attache fixés régulièrement le long de ces extrémités, ladite toile étant plus courte que la surface à entourer, on la dispose autour de la surface à entourer pour former un manchon, on exerce une forte tension avec un dispositif de mise en tension sur les éléments d'attache pour rapprocher les deux extrémités sur toute leur largeur à la fois, on ajoute aux extrémités de la toile une ou plusieurs bandes de faible largeur en fils synthétiques en dont la longueur est égale à la largeur de la toile, lesdites bandes comportant deux lisières munies de boucles qui sont enfilées dans les boucles des extrémités ou dans les boucles de la bande adjacente pour définir des canaux dans lesquels on introduit des joncs, le nombre de bandes ajoutées étant juste suffisant pour que le manchon ait sensiblement la tension voulue et que les deux séries de boucles terminant le manchon puissent être emboîtées les uns dans les autres pour définir un canal de verrouillage, on introduit un jonc dans le canal de verrouillage, et on enlève le dispositif de mise en tension ainsi que les éléments d'attache.The method of laying a canvas of synthetic threads with tension around a surface to be surrounded, according to the present invention, is easier to implement than those mentioned above and is characterized in that a canvas is taken open ended at its two ends by joining means, and provided at these ends with fastening elements fixed regularly along these ends, said fabric being shorter than the surface to be surrounded, it is placed around the surface to surround to form a sleeve, a strong tension is exerted with a tensioning device on the fastening elements to bring the two ends together over their entire width at the same time, one or more bands of weak are added to the ends of the fabric width of synthetic yarn, the length of which is equal to the width of the fabric, the said bands comprising two selvedges provided with loops which are threaded in the loops of the ends or in the loops of the adjacent band to define channels into which rods are introduced, the number of bands added being just sufficient so that the sleeve has substantially the desired tension and so that the two series of loops ending the sleeve can be fitted together. one inside the other to define a locking channel, a rod is introduced into the locking channel, and the tensioning device and the fastening elements are removed.

Selon une variante le procédé selon l'invention est caractérisé en ce qu'on prend une toile ouverte en fils synthétiques terminée à ses deux extrémités par des boucles ou des spirales, ladite toile comportant au moins à une extrémité plusieurs bandes en fils synthétiques de faible largeur dont la longueur est égale à la largeur de la toile, lesdites bandes comportant des boucles ou étant constituées par des spirales qui sont engrenées dans les boucles ou les spirales des bandes voisines et traversées par des joncs, chaque extrémité étant munie d'éléments d'attache fixés régulièrement le long de ces extrémités, on dispose ladite toile autour de ladite surface, on tire fortement sur les éléments d'attache à l'aide d'un dispositif de mise en tension, pour rapprocher les extrémités de la toile l'une de l'autre, on enlève à une extrémité de la toile une ou plusieurs bandes de façon à ce que la toile ait juste la longueur suffisante pour entourer la surface en ayant sensiblement la tension voulue, on emboîte les boucles terminant la toile les unes dans les autres pour déterminer un canal de verrouillage, on introduit un jonc dans le canal de verrouillage, et on enlève le dispositif de mise en tension ainsi que les éléments d'attache.According to a variant, the method according to the invention is characterized in that an open canvas made of synthetic threads is taken, terminated at its two ends by loops or spirals, said canvas comprising at least at one end several bands in synthetic yarns of small width, the length of which is equal to the width of the fabric, the said bands comprising loops or being constituted by spirals which are meshed in the loops or spirals of the neighboring bands and crossed by rods, each end being provided fastening elements regularly fixed along these ends, the said fabric is placed around said surface, the fastening elements are pulled strongly using a tensioning device, to bring the ends of the canvas one from the other, we remove at one end of the canvas one or more bands so that the canvas has just the length sufficient to surround the surface having substantially the desired tension, we loop the loops ending the fabric one inside the other to determine a locking channel, a rod is introduced into the locking channel, and the tensioning device is removed as well as fasteners.

Selon une seconde variante le procédé selon l'invention est caractérisé en ce qu'on prend une toile ouverte en fils synthétiques terminée à ses deux extrémités par des boucles, on la dispose autour de la surface à entourer, les deux extrémités de ladite toile étant écartées l'une de l'autre d'une distance qui va en décroissant d'un côté de la toile à l'autre selon un angle a, on tire fortement au voisinage des deux extrémités pour les rapprocher l'une de l'autre, jusqu'à ce qu'on atteigne la tension voulue, on approche une bande en fils synthétiques de longueur supérieure à la largeur de la toile et dont les deux lisières munies de boucles se rapprochent l'une de l'autre comme les extrémités de la toile selon un angle a, on déplace la bande entre les extrémités de la toile de façon à occuper tout l'écart entre lesdites extrémités, on emboîte les boucles des extrémités dans les boucles de la bande pour déterminer deux canaux de verrouillage, on introduit des joncs dans les canaux de verrouillage, on relâche la tension sur les extrémités de la toile puis on coupe la bande à la largeur de la toile.According to a second variant, the method according to the invention is characterized in that an open canvas is made of synthetic threads terminated at its two ends by loops, it is placed around the surface to be surrounded, the two ends of said canvas being spaced from each other by a distance which decreases from one side of the fabric to the other at an angle a, we pull strongly in the vicinity of the two ends to bring them closer to each other , until we reach the desired tension, we approach a strip of synthetic threads of length greater than the width of the fabric and whose two selvedges provided with loops approach each other as the ends of the fabric at an angle a, the band is moved between the ends of the fabric so as to occupy the entire gap between said ends, the loops of the ends are fitted into the loops of the band to determine two locking channels, we in produces rods in the locking channels, the tension is released on the ends of the fabric then the strip is cut to the width of the fabric.

Le procédé selon cette seconde variante est particulièrement simple à mettre en oeuvre et ne nécessite qu'une même bande quelle que soit la largeur du cylindre à revêtir.The method according to this second variant is particularly simple to implement and requires only the same strip whatever the width of the cylinder to be coated.

L'application principale du procédé de l'invention concerne la pose d'un revêtement autour d'un cylindre mais on peut également l'utiliser pour poser une toile tendue autour d'une surface qui peut être constituée par celle qui enveloppe plusieurs cylindres ou plusieurs éléments parallèles entre-eux.The main application of the process of the invention relates to the laying of a covering around a cylinder but it can also be used to lay a stretched canvas around a surface which can be constituted by that which envelops several cylinders or several elements parallel to each other.

Pour la mise en oeuvre du procédé selon l'invention on peut utiliser de préférence un dispositif comportant deux sangles munies de deux tiges rigides longitudinales entre lesquelles sont montées des tiges filetées transversales, les tiges filetées étant munies de boulons qui par serrage rapprochent une tige longitudinale de l'autre, les sangles étant prévues pour être fixées parallèlement aux tiges longitudinales sur des génératrices de la toile voisines de ses extrémités.For implementing the method according to the invention, it is preferably possible to use a device comprising two straps provided with two rigid longitudinal rods between which are mounted transverse threaded rods, the threaded rods being provided with bolts which by tightening bring a longitudinal rod closer on the other, the straps being provided to be fixed parallel to the longitudinal rods on generatrices of the fabric close to its ends.

Ce dispositif est particulièrement simple à mettre en oeuvre, notamment il peut être mis en place et retiré facilement.This device is particularly simple to implement, in particular it can be put in place and removed easily.

La présente invention sera mieux comprise à la lumière de la description qui va suivre dans laquelle :

  • Les figures 1, 2 et 3 représentent la pose de la toile autour d'un cylindre selon l'invention.
  • Les figures 4 et 5 représentent une pose de toile selon une variante de l'invention.
  • La figure 6 représente une autre variante de la méthode de pose selon l'invention.
  • La figure 7 représente une toile posée autour de plusieurs cylindres.
  • La figure 8 représente une variante additionnelle de la méthode de pose selon l'invention.
The present invention will be better understood in the light of the description which follows in which:
  • Figures 1, 2 and 3 show the installation of the canvas around a cylinder according to the invention.
  • Figures 4 and 5 show a canvas installation according to a variant of the invention.
  • FIG. 6 represents another variant of the laying method according to the invention.
  • FIG. 7 represents a fabric placed around several cylinders.
  • FIG. 8 represents an additional variant of the laying method according to the invention.

Le procédé de pose d'une toile 1 en fils synthétiques autour d'un cylindre 2 selon l'invention (voir figure 1) comporte les étapes suivantes. On prend une toile 1 constituée d'une bande par exemple tissée terminée à ses deux extrémités 3 par des séries de boucles 4 ; chez le fabricant, on a cousu les extrémités 13 de sangles 6 parallèlement aux extrémités 3 de la toile 1, c'est-à-dire parallèlement à l'axe du cylindre 2.The method of laying a canvas 1 of synthetic son around a cylinder 2 according to the invention (see Figure 1) comprises the following steps. Take a canvas 1 consisting of a strip, for example woven, terminated at its two ends 3 by series of loops 4; at the manufacturer, the ends 13 of straps 6 were sewn parallel to the ends 3 of the fabric 1, that is to say parallel to the axis of cylinder 2.

. Chez le client, on enroule la bande autour du cylindre 2 pour former un manchon, la longueur de la bande 1 est plus courte que la périphérie du cylindre mais sa largeur est égale à la longueur du cylindre 2.. At the customer's site, the strip is wrapped around the cylinder 2 to form a sleeve, the length of the strip 1 is shorter than the periphery of the cylinder but its width is equal to the length of the cylinder 2.

On prend un dispositif de mise en tension 5 (voir également figure 2) que l'on adapte dans les deux sangles souples 6 dont la largeur est égale ou supérieure à la longueur du cylindre.Take a tensioning device 5 (see also Figure 2) which is adapted in the two flexible straps 6 whose width is equal to or greater than the length of the cylinder.

A cet effet dans les sangles 6 sont logées deux tiges 7 métalliques rigides. Sur ces deux tiges 7 sont fixées des rangées de tétons 8. Des tiges 9 filetées orthogonales aux tiges 7 des sangles 6 sont fixées à une extrémité sur les tétons 8 d'une tige rigide 7 et passent à l'autre extrémité 10 à travers un alésage 11 ménagé dans les tétons 8 de l'autre tige 7. Ces autres extrémités 10 sont munies de boulons 12.For this purpose in the straps 6 are housed two rigid metal rods 7. On these two rods 7 are fixed rows of pins 8. Threaded rods 9 orthogonal to the rods 7 of the straps 6 are fixed at one end to the pins 8 of a rigid rod 7 and pass at the other end 10 through a bore 11 formed in the pins 8 of the other rod 7. These other ends 10 are provided with bolts 12.

On visse les boulons 12, ce qui rapproche les deux tiges rigides 7 l'une de l'autre. Lorsque la toile 1 est tendue avec une tension jugée suffisante (de préférence supérieure à 50 kg/m), on vient approcher une ou plusieurs bandes en fils synthétiques 14 dont la longueur est égale à la largeur du cylindre 2 et dont les deux lisières sont munies de boucles 15. Les bandes 14 sont reliées les unes aux autres par interpénétration des boucles des lisières et insertion d'un jonc 16 dans les canaux 17 ainsi définis ainsi qu'aux deux extrémités 3 (voir figure 3). On emploie le nombre de bandes 14 suffisante pour combler la distance entre les deux extrémités 3 de la toile tendue. Au cas où cette distance est nulle on n'aura pas besoin de rajouter de bandes 14.The bolts 12 are screwed, which brings the two rigid rods 7 closer to one another. When the fabric 1 is stretched with a tension deemed sufficient (preferably greater than 50 kg / m), one or more bands of synthetic threads 14 are approached, the length of which is equal to the width of the cylinder 2 and the two edges of which are provided with loops 15. The strips 14 are connected to each other by interpenetration of the edge loops and insertion of a rod 16 in the channels 17 thus defined as well as at the two ends 3 (see FIG. 3). The number of bands 14 used is sufficient to fill the distance between the two ends 3 of the stretched fabric. In case this distance is zero we will not need to add bands 14.

On dévisse les boulons 12 des tiges filetées 9 pour relâcher la tension imposée par le dispositif 5 puis on découd les sangles 6. La toile 1 est ainsi mise en tension autour du cylindre 2.The bolts 12 of the threaded rods 9 are unscrewed to release the tension imposed by the device 5 and then the straps 6 are unscrewed. The fabric 1 is thus tensioned around the cylinder 2.

Selon une variante, au lieu de mettre une toile de longueur inférieure à la périphérie du cylindre 2 on peut mettre une toile 1 de longueur légèrement supérieure à cette périphérie.Alternatively, instead of putting a canvas of length less than the periphery of the cylinder 2, it is possible to put a canvas 1 of length slightly longer than this periphery.

La toile 1 telle que livrée par le fabricant comporte déjà montée les deux sangles 6 à chaque extrémité de la toile 1. On peut également prévoir des sangles 6 en deux parties 6′, 6˝ reliées par des moyens de verrouillage 34 (jonc de fermeture à glissières (voir figure 8). Seule la partie 6′ est fixée par le fabricant aux extrémités de la toile 1 et l'utilisateur vient verrouiller les parties 6˝ sur les parties 6′. Après montage il peut récupérer le dispositif de mise en tension 5 et s'en servir pour monter une autre toile.The canvas 1 as delivered by the manufacturer already has the two straps 6 mounted at each end of the canvas 1. It is also possible to provide straps 6 in two parts 6 ′, 6˝ connected by locking means 34 (slide fastener ring (see FIG. 8). Only the part 6 ′ is fixed by the manufacturer to the ends of the fabric 1 and the user locks the parts 6˝ on the parts 6 ′. After assembly it can recover the tensioning device 5 and use it to mount another fabric.

Dans l'exemple représenté sur la figure 4 la toile 1 est constituée de bandes 20 de spirales 22 reliées par des joncs 21.In the example shown in FIG. 4, the fabric 1 consists of strips 20 of spirals 22 connected by rods 21.

On prend un dispositif 5 de mise en tension identique à celui utilisé dans l'exemple de la figure 1. Toutefois la lisière de chaque sangle 6 du côté opposé aux tiges rigides est munie de boucles rigides 23 qui passent partiellement au travers de spirales 22 à chaque extrémité 18 de la toile 1 selon des génératrices parallèles à l'axe du cylindre 2. Ces boucles 23 ont été fixées par le fabricant dans ces spirales 20 en introduisant une corde à piano 24. Ces boucles rigides 23 peuvent être des boucles formées avec les fils de trame de la sangle ou bien des spirales tenues par les fils de la sangle ou des agrafes métalliques fixées sur les bords. Les boucles 23 sont ensuite fixées aux sangles 6.Take a tensioning device 5 identical to that used in the example of FIG. 1. However, the selvedge of each strap 6 on the side opposite to the rigid rods is provided with rigid loops 23 which pass partially through spirals 22 to each end 18 of the fabric 1 along generatrices parallel to the axis of the cylinder 2. These loops 23 have been fixed by the manufacturer in these spirals 20 by introducing a piano wire 24. These rigid loops 23 may be loops formed with the weft threads of the strap or spirals held by the threads of the strap or metal staples fixed on the edges. The loops 23 are then fixed to the straps 6.

On visse ensuite les boulons 12 des tiges filetées 9 de façon à rapprocher ces tiges rigides l'une de l'autre jusqu'à ce qu'on obtienne la tension voulue.The bolts 12 of the threaded rods 9 are then screwed so as to bring these rigid rods closer to one another until the desired tension is obtained.

On élimine la surlongueur de la toile 1 en enlevant un nombre suffisant de bandes 20 de spirales 22. On garde une longueur de toile 1 entre les deux génératrices sous tension tout juste suffisante pour pouvoir fermer la toile 1 en engrenant une extrémité des spirales dans l'autre de façon à définir un canal de verrouillage 26 dans lequel on insère un jonc 21 (voir figure 5).The extra length of the fabric 1 is eliminated by removing a sufficient number of bands 20 of spirals 22. There is kept a length of fabric 1 between the two generators under tension just sufficient to be able to close the fabric 1 by meshing one end of the spirals in the 'other so as to define a locking channel 26 in which a rod 21 is inserted (see Figure 5).

On dévisse ensuite les boulons 12 des tiges 9 filetées de façon à relâcher la tension puis on libère les sangles 6 en retirant les cordes à pianos 24.Then the bolts 12 of the threaded rods 9 are unscrewed so as to release the tension, then the straps 6 are released by removing the piano strings 24.

Selon une autre variante du procédé selon l'invention représentée à la figure 6 on prévoit une toile 1 dont les deux extrémités 27 forment entre elles un angle aigu a lorsque la toile 1 en fils synthétiques est enroulée autour du cylindre 2.According to another variant of the method according to the invention shown in FIG. 6, a fabric 1 is provided, the two ends 27 of which form an acute angle a when the fabric 1 in synthetic yarn is wrapped around cylinder 2.

Ces extrémités sont munies de boucles 28. En utilisant le dispositif de mise en tension précédemment décrit (non représenté sur la figure 6) on prétend la toile 1 autour du cylindre 2 jusqu'à la tension voulue. Puis on avance une bande étroite 29 dont les deux lisières 30 sont munies de boucles 31 et font le même angle a que les deux extrémités 27 de la toile 1.These ends are provided with loops 28. Using the tensioning device described above (not shown in Figure 6) we pretend the fabric 1 around the cylinder 2 until the desired tension. Then a narrow strip 29 is advanced, the two edges 30 of which are provided with loops 31 and make the same angle a as the two ends 27 of the fabric 1.

On déplace la bande 29 jusqu'à occuper exactement l'espace entre les deux extrémités 27. On engrène alors les boucles 31 de la bande 29 dans les boucles 28 des extrémités 27 pour déterminer deux canaux de verrouillage dans lesquels on introduit deux joncs de verrouillage 32.The strip 29 is moved until it occupies exactly the space between the two ends 27. The loops 31 of the strip 29 are then engaged in the loops 28 of the ends 27 to determine two locking channels into which two locking rods are introduced. 32.

On retire le dispositif de mise en tension puis, on coupe la bande à la largeur du cylindre.The tensioning device is removed and then the strip is cut to the width of the cylinder.

Les différents procédés de pose de la toile peuvent également être utilisés pour poser une toile 1 autour d'une surface définie par exemple par plusieurs cylindres 33 d'axes parallèles comme représenté sur la figure 7.The different methods of laying the canvas can also be used to lay a canvas 1 around a surface defined for example by several cylinders 33 with parallel axes as shown in FIG. 7.

Dans la description qui précéde les boucles terminant la toile ou les lisières des bandes intermédiaires peuvent être remplacées par des spirales, des agrafes ou plus généralement par tous les moyens de jonctionnement qui engrenés ensemble définissent un canal de verrouillage dans lequel on peut introduire un jonc.In the description which precedes the loops ending the fabric or the selvedges of the intermediate bands can be replaced by spirals, staples or more generally by all the joining means which meshed together define a locking channel into which a rod can be introduced.

Dans les procédés de pose décrits, il est particulièrement intéressant que les éléments d'attache (6, 23, 6′) soient fixés parallèlement aux extrémités de la toile chez le fabricant, l'utilisateur n'a plus alors qu'à mettre en place le dispositif de mise en tension (5) ce qui est très facile à mettre en oeuvre et à enlever ou ajouter des bandes ce qui est très facile à réaliser.In the laying methods described, it is particularly advantageous for the fastening elements (6, 23, 6 ′) to be fixed parallel to the ends of the fabric at the manufacturer, the user then only has to put in place places the tensioning device (5) which is very easy to implement and to remove or add strips which is very easy to perform.

Claims (7)

1. A method for stretching a sheet (1) of synthetic threads around a surface that is to be surrounded (2), characterized in that an open sheet (1) is used supplied at both extremities (3) with loops (4) and having at these extremities (3) attaching components (6) fixed at regular intervals along the extremities (3), said sheet (1) being shorter than the surface to be surrounded (2), that the sheet is placed around the surface that is to be covered to form a sleeve, that a strong tension is exerted by means of a tensioning device (5) applied to the attaching components (6) to draw the two extremities (3) closer together simultaneously along their entire width, that one or more narrow strips (14) of synthetic fabric and with a length equal to the width of the sheet (1) are added to the extremities (3) of the sheet, these strips (14) having two selvedges with loops (15) which are threaded into the loops (4) of the extremities (3) or into the loops (15) of the adjacent strip (14) to form channels (17) into which rushes (16) are introduced, the number of strips (14) added being just sufficient so that the sleeve is essentially at the desired tension and so that the two series of loops (15, 4) ending the sleeve can be fitted into each other to form a locking channel (17), that a rush (16) is introduced into the locking channel (17), and that the tensioning device (5) and the attaching components (6) are removed.
2. A method for stretching a sheet (1) of synthetic threads around a surface that is to be surrounded, characterized in that an open sheet (1) is used supplied at both extremities (18) with loops or spirals (21) and having at these extremities (18) attaching components fixed at regular intervals along generating lines parallel to the extremities (18), said sheet (1) having at at least one extremity (18) several narrow strips (20) of synthetic thread, the length of which is equal to the width of the sheet (1), these strips (20) having loops or consisting of spirals (22) which are threaded into the loops or spirals (22) of the neighbouring strips (20) and joined by rushes (21), that this sheet (1) is positioned around said surface (2) to form a sleeve, that a strong force is applied to the attaching components (6) by means of a tensioning device (5) in order to draw the generating lines, where the attaching components are fixed, closer to each other, that one or more strips (20) are removed from one extremity (18) of the sheet (1) so that the sheet (1) should have just sufficient length to surround the surface (2) with essentially the desired tension, that the loops or spirals (22) ending the sheet are meshed into each other to form a locking channel (26), that a rush (21) is introduced into the locking channel (26), and that the attaching components and the tensioning device (5) are removed.
3. A method for stretching a sheet (1) around a surface that is to be surrounded (2), characterized in that an open sheet (1) is used supplied at both extremities (27) with loops (28), that it is positioned around the surface to be surrounded (2) to form a sleeve, the two extremities (27) of this sheet being apart from each other at a distance that decreases from one side of the sleeve (1) to the other at an angle a, that a strong force is applied in the vicinity of the two extremities (27) to draw them closer to each other, until the desired tension is achieved, that a strip (29) of synthetic threads, which is longer than the width of the sheet and the two selvedges (30) of which with loops (31) approach each other in the same way as the extremities (27) of the sleeve (1) at an angle a, is brought in and this strip (29) is moved between the extremities (27) of the sleeve (1) so that it occupies the entire space between these extremities (27), that the loops (28) of the extremities (27) are meshed with the loops (31) of the strip (29) to form two locking channels, that rushes (32) are inserted into the locking channels, that the tension in the extremities (27) of the sheet is released, and that finally the strip (29) is cut to the width of the sleeve (1).
4. A method according to any one of the preceding claims, characterized in that the surface to be surrounded is a cylinder (2).
5. A method according to any one of claims 1 to 3, characterized in that the surface to be surrounded is a set of cylinders (33) or of parallel components.
6. A tensioning device (5) for carrying out the method according to any one of the preceding claims, characterized in that it includes two straps (6) with two longitudinal rigid rods (7) between which transverse threaded rods (9) are mounted, the threaded rods (9) having bolts (12) which, when screwed up, draw one longitudinal rod (7) closer to the other, the straps (6) being provided to be temporarily fixed parallel to the longitudinal rods (7) on generating lines of the sheet (1) in the vicinity of its extremities (3, 18, 27).
7. A tensioning device according to claim 6, characterized in that each strap (6) has two parts (6′, 6˝) which can be interlocked by locking means (34), the first part (6′) being fixable to the sheet, the second part (6˝) being provided with the rigid rod (7).
EP89104015A 1988-03-08 1989-03-07 Process for putting under tension a synthetic cloth around a cylinder and tensioning apparatus for the application of the process Expired - Lifetime EP0332146B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89104015T ATE78884T1 (en) 1988-03-08 1989-03-07 PROCESS FOR COVERING A CYLINDER WITH A PLASTIC FABRIC UNDER TENSION AND TENSIONING DEVICE FOR CARRYING OUT THE PROCESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802966 1988-03-08
FR8802966A FR2628453B1 (en) 1988-03-08 1988-03-08 METHOD OF LAYING A FABRIC AROUND A CYLINDER AND PRE-TENSIONING DEVICE FOR IMPLEMENTING THE METHOD

Publications (2)

Publication Number Publication Date
EP0332146A1 EP0332146A1 (en) 1989-09-13
EP0332146B1 true EP0332146B1 (en) 1992-07-29

Family

ID=9364037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104015A Expired - Lifetime EP0332146B1 (en) 1988-03-08 1989-03-07 Process for putting under tension a synthetic cloth around a cylinder and tensioning apparatus for the application of the process

Country Status (8)

Country Link
EP (1) EP0332146B1 (en)
JP (1) JP2677660B2 (en)
AT (1) ATE78884T1 (en)
DE (1) DE68902248T2 (en)
ES (1) ES2034441T3 (en)
FI (1) FI89947C (en)
FR (1) FR2628453B1 (en)
ZA (1) ZA891774B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5866755A (en) * 1993-06-14 1999-02-02 Basf Aktiengellschaft Animals transgenic for a tetracycline-regulated transcriptional inhibitor
DE20214069U1 (en) * 2002-09-10 2003-04-10 Heimbach Gmbh & Co Conveyor belt and closing aid for connecting the belt ends of conveyor belts
US7086128B2 (en) 2002-12-27 2006-08-08 Albany International Corp. Seam assist attachment device
US7028833B2 (en) 2004-04-09 2006-04-18 Heimbach Gmbh & Co. Method for connecting the belt ends of transport belts, as well as transport belt and closure aid for carrying out said method
US20130079206A1 (en) * 2011-09-23 2013-03-28 Albany International Corp. Drum lagging material and installation apparatus therefor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR437341A (en) * 1911-11-24 1912-04-18 Gustav Hermann Ermisch Belt tensioner
GB417406A (en) * 1933-06-07 1934-10-04 Thomas Hindle Improvements in paper makers' dryer felts
GB982682A (en) * 1960-02-23 1965-02-10 Aurelio Zatti Improvements in and relating to woven felts for paper-board-making and like machines
US3436041A (en) * 1967-03-31 1969-04-01 Appleton Wire Works Corp Seam construction with heat shrinkable loop elements
JPS4819274U (en) * 1971-07-13 1973-03-05
JPS58155447U (en) * 1982-04-12 1983-10-17 金子農機株式会社 flat belt tension coupling device

Also Published As

Publication number Publication date
FI89947B (en) 1993-08-31
EP0332146A1 (en) 1989-09-13
DE68902248T2 (en) 1992-12-10
JPH01272894A (en) 1989-10-31
FR2628453A1 (en) 1989-09-15
ATE78884T1 (en) 1992-08-15
JP2677660B2 (en) 1997-11-17
FI89947C (en) 1993-12-10
FI891055A0 (en) 1989-03-06
ES2034441T3 (en) 1993-04-01
ZA891774B (en) 1989-11-29
DE68902248D1 (en) 1992-09-03
FR2628453B1 (en) 1990-11-16
FI891055A (en) 1989-09-09

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