EP0964408B1 - Information transmission cable and its manufacturing method - Google Patents

Information transmission cable and its manufacturing method Download PDF

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Publication number
EP0964408B1
EP0964408B1 EP99401400A EP99401400A EP0964408B1 EP 0964408 B1 EP0964408 B1 EP 0964408B1 EP 99401400 A EP99401400 A EP 99401400A EP 99401400 A EP99401400 A EP 99401400A EP 0964408 B1 EP0964408 B1 EP 0964408B1
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EP
European Patent Office
Prior art keywords
cable
cable according
sections
conductors
tape
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Expired - Lifetime
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EP99401400A
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German (de)
French (fr)
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EP0964408A1 (en
Inventor
Daniel Arnould
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Nexans SA
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Nexans SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
    • H01B13/2673—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping of a compartment separating metallic screen
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08—Screens specially adapted for reducing cross-talk
    • H01B11/085—Screens specially adapted for reducing cross-talk composed of longitudinal tape conductors

Definitions

  • the invention relates to a cable of electrical transmission conductors information. It also relates to a method of manufacturing such a cable.
  • each pair of conductors The most common solution for shielding each pair of conductors is to arrange a metallic or metallized ribbon in a helix around each of these pairs, the cable being formed by assembling the shielded pairs in the same protective shealth.
  • the operation of individual shielding of the pairs is slow and delicate to implement.
  • the individual shields of the pairs must be removed to access the conductors, this which makes the connection operation usually carried out on site difficult.
  • Document EP 0 915 486 A which belongs to the state of the art referred to in article 54 (3) EPC, describes a cable for the transmission of information comprising a set of pairs conductors, isolated from each other so as to limit the crosstalk between the pairs, comprising two flexible longitudinal ribbons separating the pairs, these ribbons applying around each pair due to twisting of the cable.
  • These ribbons are made of aluminum sheets, possibly covered with plastic.
  • the invention provides a flexible cable having good insulation properties between conductors, between pairs, or between quartes, and which, in addition, is of an embodiment and particularly simple to use.
  • the present invention provides a cable for the transmission of information comprising a set of conductors, or pairs or quads of conductors, isolated from one another so as to limit the crosstalk between the conductors, pairs or quads. , characterized in that it comprises at least two flexible metallized longitudinal ribbons separating the conductors, pairs or quads, these ribbons being applied around each conductor, pair or quarter due to twisting or twisting of the cable, said tapes being folded so that the shielding of each conductor, pair or quarter is ensured by a double thickness of tape.
  • longitudinal ribbon is meant a ribbon which is not wound in a helix.
  • the cable is more flexible than with a dividing cross, and it is simpler and faster to perform.
  • the necessary twist for the ribbons wrapping around each pair may be of low value. She may even be obtained practically naturally by winding or unwinding the cable at the periphery of a coil during manufacture.
  • each ribbon is folded according to a longitudinal line, the two sections being on either side of this fold being applied one against the other and being extended each by a end section having the longitudinal edges of the ribbon, these sections of ends being applied against the corresponding end sections of the other ribbon.
  • the central sections of the two ribbons and the sections ends of a tape applied against the corresponding end sections of the other ribbon forms four flexible walls, and thus delimit four compartments in which the conductors, pairs or quads are inserted. Due to twisting or a twist of the cable, each of these flexible walls is wound around the conductor, of the pair or the fourth.
  • the longitudinal fold line can be central so that the four longitudinal sections of each ribbon have the same length, or it can be offset from a center fold line so that the four sections longitudinal of each ribbon have different widths.
  • the invention applies to a cable having any number of conductors, pairs or quads isolated from each other.
  • At least one of the two ribbons, or each ribbon can be, in a mode of realization, formed by a composite material comprising an insulating support on which is arranged a metal.
  • This composite ribbon is for example "Aluster", that is to say a polyester insulator covered with aluminum.
  • the shaping of the ribbons can be carried out simultaneously with the laying of the conductors, pairs or quads in the compartments thus produced, laying taking place, of course, downstream of the shaping.
  • the cable has four pairs of wires twisted 10, 12, 14, 16. Each pair is conventionally formed by two wires insulated 18, 20 (for pair 10), each wire comprising a central conductor and a insulating sheath. The two wires 18 and 20 are twisted together.
  • Aluster ribbon consists of an aluminum foil applied against a polyester sheet. In the following description, such a ribbon will generally be referred to as composite tape.
  • Each ribbon 22, 24 ( Figures 1 and 9) is, during its manufacture, folded so that it has four sections separated by longitudinal folds.
  • the ribbon 22 has a fold central 26 on either side of which there are two sections 28 and 30 of widths applied against each other.
  • Section 28 is extended by a section 32 to right angle which ends with a longitudinal edge 34.
  • the section 30 extends, in contrast, by a second end section 36 ending in the second longitudinal edge 38.
  • the ribbon 24 is folded with two central sections 28 1 and 30 1 applied one against the other and two end sections 32 1 and 36 1 . Sections 32 and 32 1 are applied against each other. Likewise, section 36 is applied against section 36 1 . In this way, the two ribbons form, in cross section, a cross with four branches of equal length. The first branch is formed by sections 28 and 30, the second by sections 32 and 32 1 , the third by sections 28 1 and 30 1 and the fourth by sections 36 and 36 1 .
  • the four branches mentioned above delimit four compartments, respectively 52, 54, 56 and 58, in each of which is installed a pair twisted, respectively 10, 12, 14 and 16.
  • each flexible wall which consists of two central sections of a same ribbon or by two end sections of two different ribbons, wound around a pair and is applied against that pair.
  • FIG. 2 shows that the two sections of ribbon 28, 30 are applied and are wound around the twisted pair 14; Likewise, sections 32 and 32 1 are wrapped around pair 12, sections 28 1 and 30 1 are wrapped around pair 10 and sections 36 and 36 1 are wrapped around pair 16.
  • the assembly is surrounded by an external shielding (not shown) and insulation.
  • the cable does not have to be twisted for the cross sections to ribbons apply against pairs. Another type of twist can be used.
  • each wire has a diameter of 0.53 mm, and each wire has an outside diameter (of the insulation) of 1.42 mm, the continuity wire having a 0.45mm diameter, and the ribbons are composite with one layer of aluminum 50 ⁇ m thick and a layer of polyester 12 ⁇ m thick, cable can be used up to frequencies of 600 MHz with limited crosstalk between pairs.
  • the aluminum layer of each tape is turned inward, that is to say that the aluminum layers of sections 28 and 30 are applied against each other and, similarly, the aluminum layers of sections 32 and 32 1 and 36 and 36 1 are applied against each other.
  • Figures 3 and 4 is identical to that of Figures 1 and 2 to except that the ribbons 22 'and 24', corresponding to the ribbons 22 and 24 of the Figures 1 and 2 are shorter than the latter.
  • the cable thus obtained presents the same advantages as that of FIGS. 1 and 2. One obtains in particular also in this case good protection against crosstalk.
  • Figures 5 and 6 is identical to that of Figures 1 and 2 to except that ribbons 22 "and 24", corresponding to ribbons 22 and 24 of Figures 1 and 2, are shorter than the latter and asymmetrically folded (they are for this offset from each other during manufacture). Cable as well obtained has the same advantages as that of FIGS. 1 and 2. We obtain especially also in this case good protection against crosstalk.
  • the invention is not limited to a pair cable.
  • Soft ribbons could be used to shield between single conductors or between quads or other plurality of conductors.
  • the installation for manufacturing includes, for bending and forming the ribbons, guide rollers, the periphery has a shape allowing this forming and this folding.
  • two guide rollers 70, 72 are provided, a roller 74 enabling the fold to be produced central 26 and a series of successive rollers 76, 78, 80 and 82 making it possible to form gradually sections 28, 30, 32 and 36.
  • the roller 76 has at its periphery 84 a concave V shape which forms the ribbon along two equal sections 86 and 88 ( Figure 9).
  • the periphery of the roller 78 begins to separate each half-ribbon longitudinal 86, 88 in two parts intended to form the sections, respectively 30, 36 and 28, 32.
  • the folding performed by the roller 78 is shown at 90 in FIG. 9.
  • the rollers 80 and 82 complete the shaping and folding. Folding output of the roller 80 is shown at 92 in FIG. 9, while the folding obtained thanks to the roller 82 is represented by part 94.
  • a die 96 downstream of the roller 96, completes the folding of the ribbon.
  • Guiding means 100, 102, 104, 106 of the pairs are also provided. twisted 10, 12 etc. These guide means ensure the positioning of the pairs in compartments 52, 54, 56, 58 ( Figure 1) after the die 96. The twisting of the cable as a whole is made downstream of the die 96.
  • Figure 9 shows especially the case where the ribbons are folded symmetrically, but can be directly adapted in the case where, as in Figures 5 and 6, the ribbons are folded asymmetrically.
  • the installation of the ribbons does not slow down the manufacturing of the cable because this installation is carried out at the same time as that of the twisted pairs. So the speed of cable manufacturing is higher than that of a cross-partitioned cable extruded, like the cable described in document FR-2 738 947 cited above.
  • the invention also relates to a method of manufacturing a cable which is characterized in that the two ribbons 22, 24 are folded and assembled in such a way that they form a cross with four branches delimiting four quadrants 52, 54, 56, 58, in that after this forming and this assembly we install in each quadrant, a conductor, pair or quarter, and then apply a twist to the assembly, for example a twist.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Communication Cables (AREA)
  • Insulated Conductors (AREA)

Abstract

Cable for transmitting information comprises conductors, or pairs (10-16) or group of four conductors, isolated with respect to one another to limit crosstalk between conductors. It comprises at least two longitudinal compliant tapes (22,24) with a metallic coat separating the pair or the group of four conductors, the tapes are applied around each group of conductor by twisting the cable. An Independent claim is also included for a process for manufacturing the above cable.

Description

L'invention est relative à un câble de conducteurs électriques de transmission d'informations. Elle concerne aussi un procédé de fabrication d'un tel câble.The invention relates to a cable of electrical transmission conductors information. It also relates to a method of manufacturing such a cable.

La transmission d'informations par câble électrique s'effectue aujourd'hui avec un grand nombre de conducteurs et à des fréquences très élevées. L'augmentation des fréquences et l'augmentation du nombre d'informations à transmettre en parallèle sur des conducteurs distincts entraíne la nécessité de prévoir des mesures efficaces d'isolation entre les divers conducteurs électriques rassemblés dans un même câble. En effet, le risque de diaphonie augmente avec le nombre de conducteurs et la fréquence. La diaphonie s'exerce par rayonnement des informations transmises sur un conducteur vers un autre conducteur.The transmission of information by electric cable is carried out today with a large number of conductors and at very high frequencies. The increase in frequencies and the increase in the number of information to be transmitted in parallel on separate drivers leads to the need for effective measures insulation between the various electrical conductors gathered in the same cable. In the risk of crosstalk increases with the number of conductors and the frequency. Crosstalk is exerted by radiation of information transmitted on a driver to another driver.

Le plus souvent, les informations sont transmises par paires de conducteurs et, pour éviter la diaphonie, ou paradiaphonie, on isole et/ou on blinde les paires entre elles.Most often, information is transmitted in pairs of conductors and, to avoid crosstalk, or crosstalk, we isolate and / or shield the pairs between they.

La solution la plus courante pour blinder chaque paire de conducteurs est de disposer un ruban métallique ou métallisé en une hélice autour de chacune de ces paires, le câble étant formé par l'assemblage des paires blindées dans une même gaine de protection. L'opération de blindage individuel des paires est lente et délicate à mettre en oeuvre. En outre, pour le raccordement du câble ainsi constitué, les blindages individuels des paires doivent être enlevés pour accéder aux conducteurs, ce qui rend délicate l'opération de raccordement habituellement réalisée sur site. The most common solution for shielding each pair of conductors is to arrange a metallic or metallized ribbon in a helix around each of these pairs, the cable being formed by assembling the shielded pairs in the same protective shealth. The operation of individual shielding of the pairs is slow and delicate to implement. In addition, for the connection of the cable thus formed, the individual shields of the pairs must be removed to access the conductors, this which makes the connection operation usually carried out on site difficult.

Pour remédier à ces inconvénients, on a déjà proposé dans le document FR-2 738 947 un câble dans lequel les blindages électriques des divers conducteurs, notamment les paires, sont constitués par un jonc central à ailettes radiales séparant les paires les unes des autres et assurant un blindage partiel de chacune d'elles, et par un écran périphérique entourant le jonc et l'ensemble des paires, cet écran périphérique complétant ainsi le blindage de chacune des paires. Mais les ailettes du jonc formant des nervures de renforcement, un câble ainsi réalisé ne convient pas pour de nombreuses applications dans lesquelles on a besoin que le câble soit suffisamment souple. En outre, un câble équipé d'un tel ionc n'est pas aisé à fabriquer car il nécessite une opération d'extrusion.To remedy these drawbacks, it has already been proposed in the document FR-2 738 947 a cable in which the electrical shields of the various conductors, in particular the pairs, are constituted by a central rod with radial fins separating the pairs of each other and ensuring a partial shielding of each of them, and by a peripheral screen surrounding the rod and all of the pairs, this screen peripheral thus completing the shielding of each of the pairs. But the fins of the rod forming reinforcing ribs, a cable thus produced is not suitable for many applications where the cable needs to be flexible enough. In addition, a cable equipped with such an ionc is not easy to manufacture because it requires an extrusion operation.

Le document EP 0 915 486 A, qui appartient à l'état de la technique visé à l'article 54(3) CBE, décrit un câble pour la transmission d'informations comportant un ensemble de paires de conducteurs, isolés les uns par rapport aux autres de façon à limiter la diaphonie entre les paires, comportant deux rubans souples longitudinaux séparant les paires, ces rubans s'appliquant autour de chaque paire du fait d'un torsadage du câble. Ces rubans sont constitués de feuilles d'aluminium, éventuellement recouvertes de plastique.Document EP 0 915 486 A, which belongs to the state of the art referred to in article 54 (3) EPC, describes a cable for the transmission of information comprising a set of pairs conductors, isolated from each other so as to limit the crosstalk between the pairs, comprising two flexible longitudinal ribbons separating the pairs, these ribbons applying around each pair due to twisting of the cable. These ribbons are made of aluminum sheets, possibly covered with plastic.

L'invention fournit un câble souple ayant des bonnes propriétés d'isolement entre conducteurs, entre paires, ou entre quartes, et qui, en plus, est d'une réalisation et d'une utilisation particulièrement simples.The invention provides a flexible cable having good insulation properties between conductors, between pairs, or between quartes, and which, in addition, is of an embodiment and particularly simple to use.

A cet effet, la présente invention propose un câble pour la transmission d'informations comportant un ensemble de conducteurs, ou de paires ou quartes de conducteurs, isolés les uns par rapport aux autres de façon à limiter la diaphonie entre les conducteurs, paires ou quartes,
   caractérisé en ce qu'il comporte au moins deux rubans souples longitudinaux métallisés séparant les conducteurs, paires ou quartes, ces rubans s'appliquant autour de chaque conducteur, paire ou quarte du fait d'un torsadage ou d'une torsion du câble, lesdits rubans étant pliés de façon telle que le blindage de chaque conducteur, paire ou quarte soit assuré pas une double épaisseur de ruban. Par ruban "longitudinal", on entend un ruban qui n'est pas enroulé en hélice.To this end, the present invention provides a cable for the transmission of information comprising a set of conductors, or pairs or quads of conductors, isolated from one another so as to limit the crosstalk between the conductors, pairs or quads. ,
characterized in that it comprises at least two flexible metallized longitudinal ribbons separating the conductors, pairs or quads, these ribbons being applied around each conductor, pair or quarter due to twisting or twisting of the cable, said tapes being folded so that the shielding of each conductor, pair or quarter is ensured by a double thickness of tape. By "longitudinal" ribbon is meant a ribbon which is not wound in a helix.

On a constaté que les rubans longitudinaux s'enroulent en grande partie autour de chacune des paires du fait du torsadage ou d'une torsion du câble et que, pour cette raison, le blindage obtenu est plus efficace qu'un simple compartimentage.It has been found that the longitudinal ribbons are largely wound around each of the pairs due to the twisting or twisting of the cable and that, for this reason, the shielding obtained is more effective than a simple compartmentalization.

En outre, le câble est plus souple qu'avec une croix de compartimentage, et il est plus simple et plus rapide à réaliser.In addition, the cable is more flexible than with a dividing cross, and it is simpler and faster to perform.

Si on prévoit un câble non torsadé, la torsion nécessaire pour que les rubans viennent s'enrouler autour de chaque paire peut être de faible valeur. Elle peut même être obtenue pratiquement de façon naturelle par l'enroulage ou le déroulage du câble à la périphérie d'une bobine lors de la fabrication. If an untwisted cable is provided, the necessary twist for the ribbons wrapping around each pair may be of low value. She may even be obtained practically naturally by winding or unwinding the cable at the periphery of a coil during manufacture.

Selon un mode de réalisation de l'invention, chaque ruban est plié selon une ligne longitudinale, les deux sections se trouvant de part et d'autre de ce pli longitudinal étant appliquées l'une contre l'autre et étant prolongées, chacune, par une section d'extrémité présentant les arêtes longitudinales du ruban, ces sections d'extrémités étant appliquées contre les sections d'extrémités correspondantes de l'autre ruban.According to one embodiment of the invention, each ribbon is folded according to a longitudinal line, the two sections being on either side of this fold being applied one against the other and being extended each by a end section having the longitudinal edges of the ribbon, these sections of ends being applied against the corresponding end sections of the other ribbon.

De cette manière, les sections centrales des deux rubans et les sections d'extrémités d'un ruban appliquées contre les sections d'extrémités correspondantes de l'autre ruban forment quatre parois souples, et délimitent ainsi quatre compartiments dans lesquels s'insèrent les conducteurs, paires ou quartes. Du fait du torsadage ou d'une torsion du câble, chacune de ces parois souples s'enroule autour du conducteur, de la paire ou de la quarte.In this way, the central sections of the two ribbons and the sections ends of a tape applied against the corresponding end sections of the other ribbon forms four flexible walls, and thus delimit four compartments in which the conductors, pairs or quads are inserted. Due to twisting or a twist of the cable, each of these flexible walls is wound around the conductor, of the pair or the fourth.

La ligne longitudinale de pliage peut être centrale de sorte que les quatre sections longitudinales de chaque ruban ont la même longueur, ou elle peut être décalée par rapport à une ligne centrale de pliage de sorte que les quatre sections longitudinales de chaque ruban ont des largeurs différentes.The longitudinal fold line can be central so that the four longitudinal sections of each ribbon have the same length, or it can be offset from a center fold line so that the four sections longitudinal of each ribbon have different widths.

L'invention s'applique à un câble ayant un nombre quelconque de conducteurs, paires ou quartes isolés les uns par rapport aux autres.The invention applies to a cable having any number of conductors, pairs or quads isolated from each other.

Au moins l'un des deux rubans, ou chaque ruban, peut être, dans un mode de réalisation, formé par un matériau composite comprenant un support isolant sur lequel est disposé un métal. Ce ruban composite est par exemple de l'"Aluster", c'est-à-dire un isolant polyester recouvert d'aluminium.At least one of the two ribbons, or each ribbon, can be, in a mode of realization, formed by a composite material comprising an insulating support on which is arranged a metal. This composite ribbon is for example "Aluster", that is to say a polyester insulator covered with aluminum.

La mise en forme des rubans peut être effectuée simultanément à la pose des conducteurs, paires ou quartes dans les compartiments ainsi réalisés, la pose s'effectuant, bien entendu, à l'aval de la mise en forme.The shaping of the ribbons can be carried out simultaneously with the laying of the conductors, pairs or quads in the compartments thus produced, laying taking place, of course, downstream of the shaping.

D'autres caractéristiques et avantages de l'invention apparaítront avec la description de certains de ses modes de réalisation, celle-ci étant effectuée en se référant aux dessins ci-annexés sur lequel :

  • la figure 1 est un schéma en coupe d'un câble selon un premier mode de réalisation de l'invention avant sa finition par torsadage,
  • la figure 2 est une vue analogue à celle de la figure 1, après torsadage du câble,
  • la figure 3 est un schéma en coupe d'un câble selon un deuxième mode de réalisation de l'invention avant sa finition par torsadage,
  • la figure 4 est une vue analogue à celle de la figure 3, après torsadage du câble,
  • la figure 5 est un schéma en coupe d'un câble selon un troisième mode de réalisation de l'invention avant sa finition par torsadage,
  • la figure 6 est une vue analogue à celle de la figure 5, après torsadage du câble,
  • la figure 7 est une vue de côté d'une partie d'une installation de fabrication d'un câble selon l'invention,
  • la figure 8 est une vue de dessus, en coupe selon les axes des galets de l'installation de la figure 7, et
  • la figure 9 montre des étapes de formage, dans l'installation représentée sur les figures 7 et 8, de rubans d'un câble selon l'invention.
Other characteristics and advantages of the invention will appear with the description of some of its embodiments, this being carried out with reference to the attached drawings in which:
  • FIG. 1 is a sectional diagram of a cable according to a first embodiment of the invention before it is finished by twisting,
  • FIG. 2 is a view similar to that of FIG. 1, after twisting the cable,
  • FIG. 3 is a diagram in section of a cable according to a second embodiment of the invention before it is finished by twisting,
  • FIG. 4 is a view similar to that of FIG. 3, after twisting the cable,
  • FIG. 5 is a diagram in section of a cable according to a third embodiment of the invention before it is finished by twisting,
  • FIG. 6 is a view similar to that of FIG. 5, after twisting the cable,
  • FIG. 7 is a side view of part of an installation for manufacturing a cable according to the invention,
  • FIG. 8 is a top view, in section along the axes of the rollers of the installation of FIG. 7, and
  • Figure 9 shows steps of forming, in the installation shown in Figures 7 and 8, ribbons of a cable according to the invention.

Dans l'exemple des figures 1 et 2, le câble comporte quatre paires de fils torsadés 10, 12, 14, 16. Chaque paire est, de façon classique, formée par deux fils isolés 18, 20 (pour la paire 10), chaque fil comprenant un conducteur central et une gaine isolante. Les deux fils 18 et 20 sont torsadés ensemble.In the example of Figures 1 and 2, the cable has four pairs of wires twisted 10, 12, 14, 16. Each pair is conventionally formed by two wires insulated 18, 20 (for pair 10), each wire comprising a central conductor and a insulating sheath. The two wires 18 and 20 are twisted together.

Pour blinder les paires les unes par rapport aux autres, c'est-à-dire pour empêcher la paradiaphonie - qui consiste en une émission, par induction, de signaux d'une paire sur une autre - on prévoit deux rubans composites 22 et 24 en "Aluster". Un ruban en Aluster est constitué par une feuille d'aluminium appliquée contre une feuille de polyester. Dans la suite de la description, un tel ruban sera en général dénommé ruban composite.To shield the pairs from each other, i.e. to prevent crosstalk - which is the induction of signals from one pair to another - two composite ribbons 22 and 24 in "Aluster" are provided. An Aluster ribbon consists of an aluminum foil applied against a polyester sheet. In the following description, such a ribbon will generally be referred to as composite tape.

Chaque ruban 22, 24 (figures 1 et 9) est, au cours de sa fabrication, plié de façon telle qu'il présente quatre sections séparées par des plis longitudinaux.Each ribbon 22, 24 (Figures 1 and 9) is, during its manufacture, folded so that it has four sections separated by longitudinal folds.

Ces quatre sections ont des largeurs égales. Ainsi, le ruban 22 présente un pli central 26 de part et d'autre duquel se trouvent deux sections 28 et 30 de largeurs égales appliquées l'une contre l'autre. La section 28 se prolonge par une section 32 à angle droit qui se termine par une arête longitudinale 34. De même, la section 30 se prolonge, à l'opposé, par une seconde section d'extrémité 36 se terminant par la seconde arête longitudinale 38.These four sections have equal widths. Thus, the ribbon 22 has a fold central 26 on either side of which there are two sections 28 and 30 of widths applied against each other. Section 28 is extended by a section 32 to right angle which ends with a longitudinal edge 34. Similarly, the section 30 extends, in contrast, by a second end section 36 ending in the second longitudinal edge 38.

De la même manière, le ruban 24 est plié avec deux sections centrales 281 et 301 appliquées l'une contre l'autre et deux sections d'extrémités 321 et 361. Les sections 32 et 321 sont appliquées l'une contre l'autre. De même, la section 36 est appliquée contre la section 361. De cette manière, les deux rubans forment, en section droite, une croix à quatre branches d'égales longueurs. La première branche est formée par les sections 28 et 30, la seconde par les sections 32 et 321, la troisième par les sections 281 et 301 et la quatrième par les sections 36 et 361.In the same way, the ribbon 24 is folded with two central sections 28 1 and 30 1 applied one against the other and two end sections 32 1 and 36 1 . Sections 32 and 32 1 are applied against each other. Likewise, section 36 is applied against section 36 1 . In this way, the two ribbons form, in cross section, a cross with four branches of equal length. The first branch is formed by sections 28 and 30, the second by sections 32 and 32 1 , the third by sections 28 1 and 30 1 and the fourth by sections 36 and 36 1 .

Les sections à angle droit, telles que les sections 28 et 32, se raccordent par une partie courbe 40. L'ensemble de ces parties courbes 40, 42, 44, 46 forme un espace 48 qui, en section, a la forme d'un quadrilatère curviligne. Cet espace 48 est rempli par un fil conducteur nu 50 constituant un fil de continuité dont le rôle est de faciliter le raccordement du câble à ses extrémités et d'assurer une continuité électrique si le ruban présente une interruption du fait d'une dégradation ou d'un incident.Right-angled sections, such as sections 28 and 32, connect by a curved part 40. All of these curved parts 40, 42, 44, 46 form a space 48 which, in section, has the shape of a curvilinear quadrilateral. This space 48 is filled with a bare conductive wire 50 constituting a continuity wire whose role is to facilitate the connection of the cable at its ends and ensure electrical continuity if the ribbon has an interruption due to damage or an incident.

Les quatre branches mentionnées ci-dessus délimitent quatre compartiments, respectivement 52, 54, 56 et 58, dans chacun desquels est installée une paire torsadée, respectivement 10, 12, 14 et 16.The four branches mentioned above delimit four compartments, respectively 52, 54, 56 and 58, in each of which is installed a pair twisted, respectively 10, 12, 14 and 16.

Après formage des compartiments et installation des paires torsadées dans les compartiments respectifs, le câble est torsadé dans son ensemble. Dans ces conditions, chaque paroi souple, qui est constituée par deux sections centrales d'un même ruban ou par deux sections d'extrémités de deux rubans différents, s'enroule autour d'une paire et est appliquée contre cette paire.After forming the compartments and installing the twisted pairs in the respective compartments, the cable is twisted as a whole. In these conditions, each flexible wall, which consists of two central sections of a same ribbon or by two end sections of two different ribbons, wound around a pair and is applied against that pair.

Ainsi, la figure 2 montre que les deux sections de ruban 28, 30 s'appliquent et s'enroulent autour de la paire torsadée 14 ; de même, les sections 32 et 321 s'enroulent autour de la paire 12, les sections 281 et 301 s'enroulent autour de la paire 10 et les sections 36 et 361 autour de la paire 16.Thus, FIG. 2 shows that the two sections of ribbon 28, 30 are applied and are wound around the twisted pair 14; Likewise, sections 32 and 32 1 are wrapped around pair 12, sections 28 1 and 30 1 are wrapped around pair 10 and sections 36 and 36 1 are wrapped around pair 16.

Ensuite, de façon classique, l'ensemble est entouré par un blindage extérieur (non montré) et un isolant. Then, conventionally, the assembly is surrounded by an external shielding (not shown) and insulation.

On voit qu'à l'intérieur du câble les paires sont séparées entre elles par un blindage qui empêche toute propagation d'ondes émises par une paire vers une autre paire, ce qui minimise la paradiaphonie.We see that inside the cable the pairs are separated from each other by a shielding which prevents any propagation of waves emitted by a pair towards another pair, which minimizes crosstalk.

Il n'est pas indispensable que le câble soit torsadé pour que les sections de rubans s'appliquent contre les paires. Un autre type de torsion peut être utilisé.The cable does not have to be twisted for the cross sections to ribbons apply against pairs. Another type of twist can be used.

Dans un exemple de réalisation, pour lequel le câble a un diamètre hors tout d'environ 5,65 mm, le conducteur de chaque fil a un diamètre de 0,53 mm, et chaque fil a un diamètre extérieur (de l'isolant) de 1,42 mm, le fil de continuité ayant un diamètre de 0,45 mm, et les rubans sont de type composite avec une couche d'aluminium d'épaisseur 50 µm et une couche de polyester de 12 µm d'épaisseur, le câble peut être utilisé jusqu'à des fréquences de 600 MHz avec une diaphonie limitée entre paires.In an exemplary embodiment, for which the cable has an overall diameter about 5.65 mm, the conductor of each wire has a diameter of 0.53 mm, and each wire has an outside diameter (of the insulation) of 1.42 mm, the continuity wire having a 0.45mm diameter, and the ribbons are composite with one layer of aluminum 50 µm thick and a layer of polyester 12 µm thick, cable can be used up to frequencies of 600 MHz with limited crosstalk between pairs.

Dans l'exemple, la couche d'aluminium de chaque ruban est tournée vers l'intérieur, c'est-à-dire que les couches d'aluminium des sections 28 et 30 sont appliquées l'une contre l'autre et, de même, les couches d'aluminium des sections 32 et 321 et 36 et 361 sont appliquées les unes contre les autres.In the example, the aluminum layer of each tape is turned inward, that is to say that the aluminum layers of sections 28 and 30 are applied against each other and, similarly, the aluminum layers of sections 32 and 32 1 and 36 and 36 1 are applied against each other.

Ainsi, il n'est pas nécessaire de prévoir de lubrifiant pour faire glisser le ruban sur les galets de guidage et de formage lors de la fabrication car le polyester appliqué contre les galets présente des qualités de coulissement sensiblement supérieures à celles de l'aluminium.Thus, it is not necessary to provide a lubricant to slide the tape on the guide and forming rollers during manufacture because the polyester applied against the rollers has sliding qualities substantially greater than those of aluminum.

Dans les figures 3 et 4, tous les numéros de référence concernant les rubans sont identiques à ceux des figures 1 et 2 mais comportent un exposant "prime" additionnel.In Figures 3 and 4, all reference numbers for the ribbons are identical to those of FIGS. 1 and 2 but have a "prime" exponent additional.

L'exemple des figures 3 et 4 est identique à celui des figures 1 et 2 à l'exception du fait que les rubans 22' et 24', correspondant aux rubans 22 et 24 des figures 1 et 2, sont plus courts que ces derniers. Le câble ainsi obtenu présente les mêmes avantages que celui des figures 1 et 2. On obtient notamment également dans ce cas une bonne protection contre la paradiaphonie.The example of Figures 3 and 4 is identical to that of Figures 1 and 2 to except that the ribbons 22 'and 24', corresponding to the ribbons 22 and 24 of the Figures 1 and 2 are shorter than the latter. The cable thus obtained presents the same advantages as that of FIGS. 1 and 2. One obtains in particular also in this case good protection against crosstalk.

Dans les figures 5 et 6, tous les numéros de référence concernant les rubans sont identiques à ceux des figures 1 et 2 mais comportent un exposant "seconde" additionnel. In Figures 5 and 6, all reference numbers for the ribbons are identical to those of FIGS. 1 and 2 but have an exponent "second" additional.

L'exemple des figures 5 et 6 est identique à celui des figures 1 et 2 à l'exception du fait que les rubans 22" et 24", correspondant aux rubans 22 et 24 des figures 1 et 2, sont plus courts que ces derniers et pliés de façon asymétrique (ils sont pour cela décalés l'un par rapport à l'autre lors de la fabrication). Le câble ainsi obtenu présente les mêmes avantages que celui des figures 1 et 2. On obtient notamment également dans ce cas une bonne protection contre la paradiaphonie.The example of Figures 5 and 6 is identical to that of Figures 1 and 2 to except that ribbons 22 "and 24", corresponding to ribbons 22 and 24 of Figures 1 and 2, are shorter than the latter and asymmetrically folded (they are for this offset from each other during manufacture). Cable as well obtained has the same advantages as that of FIGS. 1 and 2. We obtain especially also in this case good protection against crosstalk.

L'invention n'est pas limitée à un câble à paires. Les rubans souples pourraient être utilisés pour effectuer un blindage entre conducteurs simples ou entre quartes ou autre pluralité de conducteurs.The invention is not limited to a pair cable. Soft ribbons could be used to shield between single conductors or between quads or other plurality of conductors.

L'installation de fabrication (figures 7 et 8) des câbles selon l'invention comprend, pour le pliage et le formage des rubans, des galets de guidage dont la périphérie a une forme permettant ce formage et ce pliage. Ainsi, pour le ruban 22, on prévoit deux rouleaux 70, 72 de guidage, un galet 74 permettant de réaliser le pli central 26 et une série de galets successifs 76, 78, 80 et 82 permettant de former progressivement les sections 28, 30, 32 et 36. On voit sur la figure 8 que le galet 76 présente à sa périphérie 84 une forme en V concave qui assure le formage du ruban selon deux sections égales 86 et 88 (figure 9).The installation for manufacturing (FIGS. 7 and 8) the cables according to the invention includes, for bending and forming the ribbons, guide rollers, the periphery has a shape allowing this forming and this folding. So for ribbon 22, two guide rollers 70, 72 are provided, a roller 74 enabling the fold to be produced central 26 and a series of successive rollers 76, 78, 80 and 82 making it possible to form gradually sections 28, 30, 32 and 36. We see in Figure 8 that the roller 76 has at its periphery 84 a concave V shape which forms the ribbon along two equal sections 86 and 88 (Figure 9).

La périphérie du galet 78 commence à séparer chaque demi-ruban longitudinal 86, 88 en deux parties destinées à former les sections, respectivement 30, 36 et 28, 32. Le pliage effectué par le galet 78 est représenté en 90 sur la figure 9.The periphery of the roller 78 begins to separate each half-ribbon longitudinal 86, 88 in two parts intended to form the sections, respectively 30, 36 and 28, 32. The folding performed by the roller 78 is shown at 90 in FIG. 9.

Les galets 80 et 82 complètent la mise en forme et le pliage. Le pliage à la sortie du galet 80 est représenté en 92 sur la figure 9, tandis que le pliage obtenu grâce au galet 82 est représenté par la partie 94.The rollers 80 and 82 complete the shaping and folding. Folding output of the roller 80 is shown at 92 in FIG. 9, while the folding obtained thanks to the roller 82 is represented by part 94.

Une filière 96, à l'aval du galet 96, termine le pliage du ruban.A die 96, downstream of the roller 96, completes the folding of the ribbon.

On prévoit aussi des moyens de guidage 100, 102, 104, 106 des paires torsadées 10, 12 etc. Ces moyens de guidage assurent le positionnement des paires dans les compartiments 52, 54, 56, 58 (figure 1) après la filière 96. Le torsadage du câble dans son ensemble est effectué à l'aval de la filière 96.Guiding means 100, 102, 104, 106 of the pairs are also provided. twisted 10, 12 etc. These guide means ensure the positioning of the pairs in compartments 52, 54, 56, 58 (Figure 1) after the die 96. The twisting of the cable as a whole is made downstream of the die 96.

L'installation des figures 7 et 8 permet également de fabriquer des câbles selon les deuxième et troisième modes de réalisation de l'invention. La figure 9 montre en particulier le cas où les rubans sont pliés de manière symétrique, mais peut être adaptée directement dans le cas où, comme aux figures 5 et 6, les rubans sont pliés de façon asymétrique.The installation of Figures 7 and 8 also makes it possible to manufacture cables according to the second and third embodiments of the invention. Figure 9 shows especially the case where the ribbons are folded symmetrically, but can be directly adapted in the case where, as in Figures 5 and 6, the ribbons are folded asymmetrically.

L'installation des rubans ne ralentit pas la fabrication du câble car cette installation s'effectue en même temps que celle des paires torsadés. Ainsi la vitesse de fabrication du câble est plus élevée que celle d'un câble à compartimentage à croix extrudée, comme le câble décrit dans le document FR-2 738 947 cité précédemment.The installation of the ribbons does not slow down the manufacturing of the cable because this installation is carried out at the same time as that of the twisted pairs. So the speed of cable manufacturing is higher than that of a cross-partitioned cable extruded, like the cable described in document FR-2 738 947 cited above.

L'invention concerne aussi un procédé de fabrication d'un câble qui est caractérisé en ce qu'on plie et assemble les deux rubans 22, 24 de façon telle qu'ils forment une croix à quatre branches délimitant quatre quadrants 52, 54, 56, 58, en ce qu'après ce formage et cet assemblage on installe dans chaque quadrant, un conducteur, paire ou quarte, et en ce qu'ensuite on applique une torsion à l'ensemble, par exemple un torsadage.The invention also relates to a method of manufacturing a cable which is characterized in that the two ribbons 22, 24 are folded and assembled in such a way that they form a cross with four branches delimiting four quadrants 52, 54, 56, 58, in that after this forming and this assembly we install in each quadrant, a conductor, pair or quarter, and then apply a twist to the assembly, for example a twist.

Ce procédé s'applique également aux modes de réalisation des figures 3 à 6.This method also applies to the embodiments of FIGS. 3 to 6.

Claims (11)

  1. A cable for transmitting information including a set of conductors or pairs (10 to 16) or quads of conductors insulated from each other to limit crosstalk between the conductors, pairs or quads, characterized in that it comprises at least two metallized longitudinal flexible tapes (22, 24) separating the conductors, pairs or quads, these tapes being applied around each conductor, pair or quad by virtue of twisting or torsion of the cable, said tapes being folded so that each conductor, pair or quad is shielded by a double thickness of tape.
  2. A cable according to one of the claims 1, characterized in that each tape (22, 24) is folded (26) along a longitudinal line, the two sections (28, 30) on respective opposite sides of this longitudinal fold are pressed together and each is extended by an end section (32, 36) comprising the longitudinal edges (34, 38) of the tape, which end sections are pressed against the corresponding end sections of the other tape.
  3. A cable according to claim 2, characterized in that the longitudinal folding line (26) is central and in that the four longitudinal sections of each tape have the same width.
  4. A cable according to claim 2, characterized in that the longitudinal folding line is offset relative to a central folding line of said two tapes and in that the four longitudinal sections of each tape have different widths.
  5. A cable according to claim 2 to 4, characterized in that the area (40, 42, 44, 46) in which the central sections join the end sections delimit a space (48) containing a conductive continuity wire (50).
  6. A cable according to any of claims 1 to 5, characterized in that at least one of said flexible tapes comprises an insulative layer and a metallic layer.
  7. A cable according to claim 6, characterized in that the metal of the tape is aluminium.
  8. A cable according to either of claims 6 and 7, characterized in that the insulative layer of the flexible tape is based on polyester.
  9. A cable according to any of claims 6 to 8, characterized in that each of the two tapes has a metallized insulative layer on one side only and the metallized faces are pressed together.
  10. A cable according to any of claims 1 to 9, characterized in that it comprises an external shield surrounding all the conductors, pairs or quads.
  11. A method of manufacturing a cable according to any of claims 1 to 10, characterized in that the two tapes (22, 24) are folded and assembled so that they form a cross with four branches delimiting four quadrants (52, 54, 56, 58), in that a conductor, pair or quad is installed in each quadrant after this forming and assembly, and in that torsion is then applied to the assembly, for example by twisting it.
EP99401400A 1998-06-11 1999-06-10 Information transmission cable and its manufacturing method Expired - Lifetime EP0964408B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9807342A FR2779866B1 (en) 1998-06-11 1998-06-11 CABLE FOR TRANSMITTING INFORMATION AND ITS MANUFACTURING METHOD
FR9807342 1998-06-11

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EP0964408A1 EP0964408A1 (en) 1999-12-15
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EP (1) EP0964408B1 (en)
AT (1) ATE274229T1 (en)
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NO321723B1 (en) 2006-06-26
EP0964408A1 (en) 1999-12-15
DE69919453T2 (en) 2004-12-23
DE69919453D1 (en) 2004-09-23
NO992833L (en) 1999-12-13
FR2779866A1 (en) 1999-12-17
US6288340B1 (en) 2001-09-11
NO992833D0 (en) 1999-06-10
ATE274229T1 (en) 2004-09-15
FR2779866B1 (en) 2000-07-13

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