EP0014621A1 - Coaxial cable with composite insulation for telecommunication, method for applying the external insulation of such a cable and apparatus for carrying out this method - Google Patents

Coaxial cable with composite insulation for telecommunication, method for applying the external insulation of such a cable and apparatus for carrying out this method Download PDF

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Publication number
EP0014621A1
EP0014621A1 EP80400103A EP80400103A EP0014621A1 EP 0014621 A1 EP0014621 A1 EP 0014621A1 EP 80400103 A EP80400103 A EP 80400103A EP 80400103 A EP80400103 A EP 80400103A EP 0014621 A1 EP0014621 A1 EP 0014621A1
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EP
European Patent Office
Prior art keywords
tape
insulation
ribbon
conductor
external
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Granted
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EP80400103A
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German (de)
French (fr)
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EP0014621B1 (en
Inventor
Noel Girardon
Jean-Claude Staath
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Lignes Telegraphiques et Telephoniques LTT SA
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Lignes Telegraphiques et Telephoniques LTT 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
    • H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
    • H01B13/0165—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables of the layers outside the outer conductor
    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/10—Insulating conductors or cables by longitudinal lapping

Definitions

  • French patent No. 2 216 652 has been described by the Applicant on February 1, 1973 as a longitudinally sealed coaxial cable structure. There has been described in French Patent No. 2,224,844 and its first addition No. 2,315,155 filed by the Applicant a method of manufacturing such a cable and a machine intended for its manufacture.
  • the present invention relates to a method of external insulation of coaxial cable for telecommunications and more particularly of a coaxial cable of the type described in the first cited patent.
  • the main advantage of the method according to the present invention resides in that the external insulation can be carried out on the cable manufacturing line without subject of the second patent cited without modifying the running speed.
  • Another advantage of the present invention consists in the low cost of insulation resulting as much from the low price of the materials used as from the simplicity of implementation.
  • Another advantage of the present invention results from the use of clean, non-polluting and non-toxic insulation materials.
  • the external insulation of a coaxial structure is obtained by laying along a composite insulation comprising a tape of hardness less than SHORE D 46 and a dielectric tape, the latter being laid at covering, made adherent to said external conductor by the interposition of an elastic material of elongation at break greater than 300% at 20 ° C. after implementation allowing the rotation of the composite tape on the external conductor. All of the two tapes simultaneously provide mechanical protection of the structure and insulation.
  • the elasticity of the adhesive material provides a certain freedom of movement of the insulation with respect to the external conductor and the tapes between them which provides mechanical protection of the structure during subsequent manipulations (assembly, placing on a drum, etc.) .
  • the first ribbon is made of kraft paper laid edge to edge
  • the second of polypropylene laid overlapped and the bonding is limited to two generatrices of the cable for each ribbon with an angular offset sufficient for the zones glued do not overlap, these generators being arranged in the vicinity of the edges.
  • the first strip may also be made of plastic, solid or cellular, smooth or corrugated. It can also be composite such as a coated paper.
  • the second strip is necessarily continuous and of high dielectric strength to define the insulation. It advantageously has a surface condition which facilitates the subsequent use of the isolated structure (storage on a drum, assembly, etc.).
  • FIG. 1 shows the different stages of the insulation of a coaxial structure according to the present invention.
  • This structure can, for example, be of the type described in French patent No. 2 216 652.
  • FIG. 2 shows a sectional view of the preferred variant of coaxial structure, isolated according to the present invention.
  • a transversely corrugated dielectric tape 17 is crushed between 16 and the outer conductor 18.
  • This structure is that described in French patent n ° 2 216 652. It is insulated by a composite set of tapes which provides mechanical protection of the structure, the first tape 19 is made of material which is sufficiently soft to absorb transverse stresses and a second tape 20 made of material, ensuring the required dielectric strength.
  • the ribbon 19 is laid with contiguous edges and the ribbon 20 is overlapped, the connection lines of the edges being angularly offset as it appears at 21 and 22.
  • the ribbon 19 is glued to the conductor 18 along two generators 23 and 23 respectively. 24 and the ribbon 20 is glued to the ribbon 19 along the generator 25 and on itself according to the generator 26. 25 and 26 are angularly offset with respect to 23 and 24.
  • the ribbon 19 consists of kraft paper at 96 g / m 2 commonly used in cable making; the tape 20 is 0.1 mm polypropylene thick and the glue is of the "Hot melt” type sold by the Rousselot Company - 8 Rue Christophe Colomb in PARIS.
  • the glue is of the "Hot melt” type sold by the Rousselot Company - 8 Rue Christophe Colomb in PARIS.
  • the use of locally pre-glued ribbons may make it possible to overcome a limitation of the running speed which would be due to the applicator 'glue. It should be noted that it is not favorable to increase the glued area too much so as not to eliminate the possibility of displacement of the insulation on the external conductor under the action of external stresses.
  • FIG. 3 represents the elements to be added to a coaxial cable manufacturing line according to French patent No. 2,224,844 to provide insulation according to the present invention.
  • the drawing member and the reel for receiving the production line are shown in 51 and 52 respectively in accordance with the references of these elements in the cited patent.
  • Such a preparation usually consists of wiping the cable to remove traces of oil resulting from the shrinking for calibration. This operation, common in cables, can be ensured by brushing or by passing through a felt ring.
  • 71 and 72 represent the adhesive applicators on the external conductor (step 7).
  • a die 75 provides a pressure to the right of the glued generator and the fixing of the first insulating tape by adhesion of the threads 71 'and 72' of glue still liquid on the external conductor (step 8).
  • the die 75 is produced as is well known.
  • the second element 20 of the insulation is provided by the unwinder 79 and guided at 80 so as to come to be applied to the first insulator. There is shown at 21 the contiguous edges of the first strip 19 after installation.
  • the glue applicators 76 and 77 are arranged on either side of the connection line 21 and sufficiently spaced therefrom so that the glue threads 76 'and 77' do not cover 71 'and 72' taking into account the oscillations that may occur during manufacture (step 9).
  • An orienting finger 85 is arranged downstream of the two applicators at a point where the die 81 ensures the shaping of the ribbon 20 (step 10).
  • This ribbon is laid with overlap as it appears at 22.
  • the ribbon 19 consists for example of kraft paper of O, approximately 1 mm thick and the ribbon 20 of polypropylene of O, 1 mm thick and the adhesive is the one mentioned above.
  • the quantity of glue which must be deposited per unit of time depends on the diameter of the extruded bead of glue, which is fixed by the surface to be glued and on the speed of travel of the cable.
  • a glue supply circuit for applicators 71 - 72 and 76 - 77 which is controlled by the cable running speed, for example from the draw 51. This control can be ensured by controlling the flow rate adhesive.
  • the insulation control (step 11) is carried out at 82 by a standard bursting device.
  • the line which has just been described corresponds to the preferred structure of FIG. 2. It is understood that the double-layer insulation according to the present invention can be provided from other tapes as already mentioned. . In some cases, these can be pre-glued and the applicators and their supply are unnecessary. To reactivate the adhesive, it is generally necessary to use heating dies, such as 75.
  • the insulation of coaxial cables in accordance with the invention does not modify their electrical characteristics.
  • the Applicant has assembled twelve isolated coaxial pairs according to the invention and twelve naked coaxial pairs of the same manufacture. The measurements of regularity of impedance and weakening in reflection on the two assemblies gave the same results.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Insulated Conductors (AREA)

Abstract

1. Coaxial cable having a composite insulation arranged about its outer conductor, characterized in that the insulation comprises : - a first ribbon (19) of paper or of a plastic material having a SHORE-D-hardness smaller than 46, applied lengthwise and edge to edge, and locally adhered onto the outer conductor (18), this ribbon forming a damping pad ; - a second ribbon (20) having a high dielectric strength in a manner to define the electrical insulation of the cable, and which is adhered to the first ribbon (19) and has edges covering each other and adhered one to another in the coverage zones.

Description

On a décrit dans le brevet français n° 2 216 652 déposé par la Demanderesse le 1er Février 1973 une structure de câble coaxial étanche longitudinalement. On a décrit dans le brevet français n° 2 224 844 et sa première addition n° 2 315 155 déposés par la Demanderesse un procédé de fabrication d'un tel câble et une machine destinée à sa fabrication. La présente invention concerne un procédé d'isolation externe de câble coaxial pour télécommunication et plus particulièrement d'un câble coaxial du type décrit dans le premier brevet cité.French patent No. 2 216 652 has been described by the Applicant on February 1, 1973 as a longitudinally sealed coaxial cable structure. There has been described in French Patent No. 2,224,844 and its first addition No. 2,315,155 filed by the Applicant a method of manufacturing such a cable and a machine intended for its manufacture. The present invention relates to a method of external insulation of coaxial cable for telecommunications and more particularly of a coaxial cable of the type described in the first cited patent.

L'avantage principal du procédé selon la présente invention réside en ce que l'isolation externe peut être effectuée sur la ligne de fabrication du câble sans objet du deuxième brevet cité sans en modifier la vitesse de défilement.The main advantage of the method according to the present invention resides in that the external insulation can be carried out on the cable manufacturing line without subject of the second patent cited without modifying the running speed.

Un autre avantage de la présente invention consiste dans le faible coût de l'isolation résultant autant du faible prix des matériaux utilisés que de la simplicité de mise en oeuvre.Another advantage of the present invention consists in the low cost of insulation resulting as much from the low price of the materials used as from the simplicity of implementation.

Un autre avantage de la présente invention résulte de l'utilisation de matériaux d'isolation propres, non polluants et non toxiques.Another advantage of the present invention results from the use of clean, non-polluting and non-toxic insulation materials.

Selon la caractéristique essentielle de la présente invention, l'isolation externe d'une structure coaxiale est obtenue par la pose en long d'une isolation composite comportant un ruban de dureté inférieure à SHORE D 46 et un ruban diélectrique, ce dernier étant posé à recouvrement, rendu adhérent audit conducteur extérieur par l'interposition d'un matériau élastique d'allongement à la rupture supérieure à 300 % à 20°C après mise en oeuvre permettant la rotation du ruban composite sur le conducteur extérieur. L'ensemble des deux rubans assure simultanément la protection mécanique de la structure et l'isolation. L'élasticité du matériau adhésif apporte une certaine liberté de déplacement de l'isolation par rapport au conducteur extérieur et des rubans entre eux qui assure la protection mécanique de la structure au cours des manipulations ultérieures (assemblage, mise sur touret, etc.. ).According to the essential characteristic of the present invention, the external insulation of a coaxial structure is obtained by laying along a composite insulation comprising a tape of hardness less than SHORE D 46 and a dielectric tape, the latter being laid at covering, made adherent to said external conductor by the interposition of an elastic material of elongation at break greater than 300% at 20 ° C. after implementation allowing the rotation of the composite tape on the external conductor. All of the two tapes simultaneously provide mechanical protection of the structure and insulation. The elasticity of the adhesive material provides a certain freedom of movement of the insulation with respect to the external conductor and the tapes between them which provides mechanical protection of the structure during subsequent manipulations (assembly, placing on a drum, etc.) .

Selon une variante préférée de l'invention, le premier ruban est en papier kraft posé bord à bord, le second en polypropylène posé à recouvrement et le collage est limité à deux génératrices du câble pour chaque ruban avec un décalage angulaire suffisant pour que les zones encollées ne se recouvrent pas, ces génératrices étant disposées au voisinage des bords.According to a preferred variant of the invention, the first ribbon is made of kraft paper laid edge to edge, the second of polypropylene laid overlapped and the bonding is limited to two generatrices of the cable for each ribbon with an angular offset sufficient for the zones glued do not overlap, these generators being arranged in the vicinity of the edges.

Toutefois, le premier ruban peut être également en matière plastique, massif ou alvéolé, lisse ou ondulé. Il peut également être composite tel un papier contre-couché. Le deuxième ruban est nécessairement continu et à forte rigidité diélectrique pour définir l'isolation. Il présente avantageusement un état de surface qui facilite l'utilisation ultérieure de la structure isolée (stockage sur touret, assemblage etc...).However, the first strip may also be made of plastic, solid or cellular, smooth or corrugated. It can also be composite such as a coated paper. The second strip is necessarily continuous and of high dielectric strength to define the insulation. It advantageously has a surface condition which facilitates the subsequent use of the isolated structure (storage on a drum, assembly, etc.).

L'invention sera bien comprise en se reportant à la description suivante et aux figures qui l'accompagnent données à titre d'illustration non limitative et dans lesquelles :

  • - la figure 1 est un bloc diagramme du procédé de fabrication de la structure isolée :
  • - la figure 2 représente une vue en coupe d'une structure coaxiale selon l'invention ;
  • - la figure 3 est un schéma des éléments propres à l'isolation à introduire dans la ligne de fabrication ;
  • - la figure 4 est une vue à plus grande échelle de la pose des deux rubans assurant l'isolation.
The invention will be better understood by referring to the following description and to the accompanying figures given by way of nonlimiting illustration and in which:
  • - Figure 1 is a block diagram of the manufacturing process of the isolated structure:
  • - Figure 2 shows a sectional view of a coaxial structure according to the invention;
  • - Figure 3 is a diagram of the elements specific to the insulation to be introduced into the production line;
  • - Figure 4 is an enlarged view of the installation of the two tapes providing insulation.

On a représenté sur la figure 1 les différentes étapes de l'isolation d'une structure coaxiale selon la présente invention. Cette structure peut, par exemple, être du type décrit dans le brevet français n° 2 216 652. On a figuré en 6 une opération de préparation destinée à éliminer de la surface tout corps étranger qui gênerait les opérations suivantes, en 7 l'encollage du premier ruban limité de préférence à deux bandes d'environ 1 mm de large parallèle à l'axe de la structure, en 8 la pose en long du premier ruban, en 9 l'encollage de deux bandes étroites du deuxième ruban et en 10 la pose dudit ruban, un contrôle d'isolation 11 est prévu avant le stockage 12 ou l'utilisation, sur une assembleuse par exemple, de la structure isolée ainsi formée.FIG. 1 shows the different stages of the insulation of a coaxial structure according to the present invention. This structure can, for example, be of the type described in French patent No. 2 216 652. There is shown in 6 a preparation operation intended to remove from the surface any foreign body which would interfere with the following operations, in 7 sizing of the first ribbon preferably limited to two strips of about 1 mm wide parallel to the axis of the structure, at 8 laying it along the first ribbon, at 9 the gluing of two narrow strips of the second ribbon and at 10 the laying of said tape, an insulation control 11 is provided before storage 12 or use, on an assembly machine for example, of the isolated structure thus formed.

La figure 2 représente une vue en coupe de la variante préférée de structure coaxiale, isolée selon la présente invention. On a figuré en 15 le conducteur central autour duquel sont moulés les disques isolants 16, un ruban diélectrique ondulé transversalement 17 est écrasé entre 16 et le conducteur extérieur 18. Cette structure est celle décrite dans le brevet français n° 2 216 652. Elle est isolée par un ensemble composite de rubans qui assure une protection mécanique de la structure, le premier ruban 19 est en matériau suffisamment mou pour amortir les contraintes transversales et un second ruban 20 en matériau, assurant la rigidité diélectrique requise. Le ruban 19 est posé à bords jointifs et le ruban 20 à recouvrement, les lignes de raccordement des bords étant décalées angulairement ainsi qu'il apparait en 21 et 22. Le ruban 19-est collé sur le conducteur 18 suivant deux génératrices respectivement 23 et 24 et le ruban 20 est collé sur le ruban 19 suivant la génératrice 25 et sur lui-même suivant la génératrice 26. 25 et 26 sont angulairement décalées par rapport à 23 et 24.2 shows a sectional view of the preferred variant of coaxial structure, isolated according to the present invention. There is shown at 15 the central conductor around which the insulating discs 16 are molded, a transversely corrugated dielectric tape 17 is crushed between 16 and the outer conductor 18. This structure is that described in French patent n ° 2 216 652. It is insulated by a composite set of tapes which provides mechanical protection of the structure, the first tape 19 is made of material which is sufficiently soft to absorb transverse stresses and a second tape 20 made of material, ensuring the required dielectric strength. The ribbon 19 is laid with contiguous edges and the ribbon 20 is overlapped, the connection lines of the edges being angularly offset as it appears at 21 and 22. The ribbon 19 is glued to the conductor 18 along two generators 23 and 23 respectively. 24 and the ribbon 20 is glued to the ribbon 19 along the generator 25 and on itself according to the generator 26. 25 and 26 are angularly offset with respect to 23 and 24.

Dans la variante préférée, le ruban 19 est constitué par du papier kraft à 96 g/m2 couramment utilisé en câblerie ; le ruban 20 est du polypropylène de 0,1 mm d'épaisseur et la colle est du type "Hot melt" vendu par la Société Rousselot - 8 Rue Christophe Colomb à PARIS. Une telle isolation permet de maintenir une différence de potentiel de 10.000 V continus pendant 1 minute entre deux paires en contact l'une avec l'autre. Il est bien entendu que le nombre et la largeur des zones encollées ne sont pas liées à l'isolement et dépendent de la nature de l'adhésif utilisé. D'autres variantes ont donné également de bons résultats. En particulier l'utilisation de rubans pré-encollés localement dont l'adhésif est activé, par chauffage par exemple, juste avant la pose du ruban peuvent permettre de s'affranchir d'une limitation de la vitesse de défilement qui serait due à l'applicateur'de colle. Il faut remarquer qu'il n'est pas favorable d'augmenter trop la surface encollée de façon à ne pas supprimer la possibilité de déplacement de l'isolation sur le conducteur extérieur sous l'action de contraintes extérieures.In the preferred variant, the ribbon 19 consists of kraft paper at 96 g / m 2 commonly used in cable making; the tape 20 is 0.1 mm polypropylene thick and the glue is of the "Hot melt" type sold by the Rousselot Company - 8 Rue Christophe Colomb in PARIS. Such insulation makes it possible to maintain a potential difference of 10,000 V DC for 1 minute between two pairs in contact with each other. It is understood that the number and the width of the glued areas are not linked to the insulation and depend on the nature of the adhesive used. Other variants have also given good results. In particular, the use of locally pre-glued ribbons, the adhesive of which is activated, for example by heating, just before laying the ribbon, may make it possible to overcome a limitation of the running speed which would be due to the applicator 'glue. It should be noted that it is not favorable to increase the glued area too much so as not to eliminate the possibility of displacement of the insulation on the external conductor under the action of external stresses.

La figure 3 représente les éléments à ajouter à une ligne de fabrication de câble coaxial selon le brevet français n° 2 224 844 pour assurer l'isolation selon la présente invention. On a représenté en 51 et 52 respectivement l'organe de tirage et le touret de réception de la ligne de fabrication conformément aux références de ces éléments dans le brevet cité. On a figuré d'une façon schématique en 70 le poste de préparation du conducteur extérieur du coaxial destiné à assurer un état de la surface du conducteur extérieur permettant la pose du premier ruban isolant (étape 6). Une telle préparation consiste le plus souvent à essuyer le câble pour éliminer les traces d'huile résultant du rétreint pour calibrage. Cette opération, courante en câblerie, peut être assurée par brossage ou par passage dans un anneau de feutre. 71 et 72 représentent les applicateurs de-colle sur le conducteur extérieur (étape 7). 18, 71 et 72 sont disposés symétriquement par rapport à la génératrice suivant laquelle va se trouver le déjoint (21 de la figure 2) du premier élément 19 de l'isolation composite, fourni par le dérouleur 73 à tension constante et centré par le guide 74. Une filière 75 assure une pression au droit de la génératrice encollée et la fixation du premier ruban isolant par adhésion des filets 71' et 72' de colle encore liquide sur le conducteur extérieur (étape 8). La filière 75 est réalisée ainsi qu'il est bien connu. Le deuxième élément 20 de l'isolation est fourni par le dérouleur 79 et guidé en 80 de façon à venir s'appliquer sur le premier isolant. On a représenté en 21 les bords jointifs du premier ruban 19 après pose. Les applicateurs de colle 76 et 77 sont disposés de part et d'autre de la ligne de raccordement 21 et suffisamment écartés de celle-ci pour que les filets de colle 76' et 77' ne recouvrent pas 71' et 72' compte tenu des oscillations qui peuvent survenir en cours de fabrication (étape 9). Un doigt orienteur 85 est disposé en aval des deux applicateurs en un point où la filière 81 assure la mise en forme du ruban 20 (étape 10). Ce ruban est posé à recouvrement ainsi qu'il apparait en 22. Le ruban 19 est constitué par exemple de papier kraft de O,1 mm d'épaisseur environ et le ruban 20 de polypropylène de O,1 mm d'épaisseur et la colle est celle mentionnée ci-dessus. La quantité de colle qui doit être déposée par unité de temps dépend du diamètre du cordon de colle extrudé, qui est fixé par la surface à encoller et de la vitesse de défilement du câble. On a figuré en 78 un circuit d'alimentation en colle des applicateurs 71 - 72 et 76 - 77 qui est asservi à la vitesse de défilement du câble, par exemple à partir du tirage 51. Cet asserviccement peut être assuré par le contrôle du débit de l'adhésif. Le contrôle de l'isolation (étape 11) est effectué en 82 par un dispositif standard à éclatement.FIG. 3 represents the elements to be added to a coaxial cable manufacturing line according to French patent No. 2,224,844 to provide insulation according to the present invention. The drawing member and the reel for receiving the production line are shown in 51 and 52 respectively in accordance with the references of these elements in the cited patent. There has been shown schematically at 70 the preparation station of the external conductor of the coaxial intended to ensure a condition of the surface of the external conductor allowing the laying of the first insulating tape (step 6). Such a preparation usually consists of wiping the cable to remove traces of oil resulting from the shrinking for calibration. This operation, common in cables, can be ensured by brushing or by passing through a felt ring. 71 and 72 represent the adhesive applicators on the external conductor (step 7). 18, 71 and 72 are arranged symmetrically with respect to the generator along which the gap (21 in FIG. 2) of the first element 19 of the composite insulation will be located, supplied by the unwinder 73 at constant tension and centered by the guide 74. A die 75 provides a pressure to the right of the glued generator and the fixing of the first insulating tape by adhesion of the threads 71 'and 72' of glue still liquid on the external conductor (step 8). The die 75 is produced as is well known. The second element 20 of the insulation is provided by the unwinder 79 and guided at 80 so as to come to be applied to the first insulator. There is shown at 21 the contiguous edges of the first strip 19 after installation. The glue applicators 76 and 77 are arranged on either side of the connection line 21 and sufficiently spaced therefrom so that the glue threads 76 'and 77' do not cover 71 'and 72' taking into account the oscillations that may occur during manufacture (step 9). An orienting finger 85 is arranged downstream of the two applicators at a point where the die 81 ensures the shaping of the ribbon 20 (step 10). This ribbon is laid with overlap as it appears at 22. The ribbon 19 consists for example of kraft paper of O, approximately 1 mm thick and the ribbon 20 of polypropylene of O, 1 mm thick and the adhesive is the one mentioned above. The quantity of glue which must be deposited per unit of time depends on the diameter of the extruded bead of glue, which is fixed by the surface to be glued and on the speed of travel of the cable. There has been shown at 78 a glue supply circuit for applicators 71 - 72 and 76 - 77 which is controlled by the cable running speed, for example from the draw 51. This control can be ensured by controlling the flow rate adhesive. The insulation control (step 11) is carried out at 82 by a standard bursting device.

La ligne qui vient d'être décrite correspond à la structure préférée de la figure 2. Il est bien entendu que l'isolation à couche double selon la présente invention peut être assurée à partir d'autres rubans ainsi qu'il a déjà été mentionné. Dans certains cas, ceux-ci peuvent être pré-encollés et les applicateurs et leur alimentation sont inutiles. Pour réactiver l'adhésif, il est généralement nécessaire d'utiliser des filières, telle 75, chauffantes.The line which has just been described corresponds to the preferred structure of FIG. 2. It is understood that the double-layer insulation according to the present invention can be provided from other tapes as already mentioned. . In some cases, these can be pre-glued and the applicators and their supply are unnecessary. To reactivate the adhesive, it is generally necessary to use heating dies, such as 75.

L'isolation de câbles coaxiaux conformément à l'invention ne modifie pas leurs caractéristiques électriques. La demanderesse a assemblé douze paires coaxiales isolées selon l'invention et douze paires coaxiales nues de même fabrication. Les mesures de régularité d'impédance et d'affaiblissement en réflexion sur les deux assemblages ont donné les mêmes résultats.The insulation of coaxial cables in accordance with the invention does not modify their electrical characteristics. The Applicant has assembled twelve isolated coaxial pairs according to the invention and twelve naked coaxial pairs of the same manufacture. The measurements of regularity of impedance and weakening in reflection on the two assemblies gave the same results.

Claims (6)

1- Procédé d'isolation externe de câbles coaxiaux comportant les opérations suivantes : - préparation du conducteur extérieur (étape 6) - pose en long d'une isolation composite comportant un ruban de dureté inférieure à SHOPE D 46 et un ruban diélectrique, ce dernier étant posé à recouvrement, rendu adhérent audit conducteur extérieur par l'interposition d'un matériau élastique d'allongement à la rupture supérieur à 300 % à 20°C après mise en oeuvre permettant la rotation du ruban composite sur le conducteur extérieur (étapes 7 à 10) - contrôle d'isolement. 1- Method of external insulation of coaxial cables comprising the following operations: - preparation of the external conductor (step 6) - laying along a composite insulation comprising a tape of hardness lower than SHOPE D 46 and a dielectric tape, the latter being laid overlap, made adherent to said external conductor by the interposition of an elastic elongation material at the rupture greater than 300% at 20 ° C after implementation allowing the rotation of the composite tape on the external conductor (steps 7 to 10) - insulation control. 2- Procédé d'isolation externe selon revendication 1 dans lequel l'adhérence entre le ruban composite (19 - 20) et le conducteur extérieur (18) est assurée par un dépôt adhésif au voisinage des bords du ruban recouvrant moins de 30 % de la surface du ruban appliqué bord à bord sur le conducteur extérieur (étape 7).2- external insulation method according to claim 1 wherein the adhesion between the composite tape (19 - 20) and the outer conductor (18) is provided by an adhesive deposit in the vicinity of the edges of the tape covering less than 30% of the tape surface applied edge to edge on the outer conductor (step 7). 3- Procédé d'isolation externe selon revendication 1 dans lequel l'adhérence entre les constituants du ruban composite est assurée par dépôt sur le deuxième ruban (20), avant pose sur le premier (19), d'un adhésif dans une zone au moins hors du recouvrement.3- external insulation method according to claim 1 wherein the adhesion between the constituents of the composite tape is ensured by depositing on the second tape (20), before laying on the first (19), an adhesive in an area at less out of recovery. 4- Procédé d'isolation externe selon revendication 3 dans lequel le ruban diélectrique (20) est fermé par dépôt simultané d'adhésif dans la zone de recouvrement.4- External insulation method according to claim 3 wherein the dielectric tape (20) is closed by simultaneous deposition of adhesive in the overlap area. 5- Elément de câble coaxial isolé pour télécommunication obtenu par mise en oeuvre du procédé selon revendication 1.5- insulated coaxial cable element for telecommunication obtained by implementing the method according to claim 1. 6- Elément de transmission coaxial isolé comportant un conducteur central (15), des disques isolants moulés (16) sur ledit conducteur, un ruban diélectrique ondulé transversalement posé longitudinalement sur les disques (17), un conducteur extérieur soudé en long (18), une isolation composite comportant un ruban de papier kraft (19) posé bord à bord collé localement sur le conducteur extérieur et un ruban de polypropylène collé sur le ruban de papier et posé à recouvrement (20).6- Insulated coaxial transmission element comprising a central conductor (15), molded insulating discs (16) on said conductor, a transversely corrugated dielectric tape laid longitudinally on the discs (17), an outer conductor welded lengthwise (18), a composite insulation comprising a ribbon of kraft paper (19) laid edge to edge locally bonded to the outer conductor and a polypropylene ribbon bonded to the paper ribbon and overlapped (20).
EP19800400103 1979-02-12 1980-01-22 Coaxial cable with composite insulation for telecommunication, method for applying the external insulation of such a cable and apparatus for carrying out this method Expired EP0014621B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7903440A FR2448771A2 (en) 1979-02-12 1979-02-12 METHOD FOR MANUFACTURING COAXIAL CABLES AND IMPLEMENTATION MACHINE
FR7903440 1979-02-12

Publications (2)

Publication Number Publication Date
EP0014621A1 true EP0014621A1 (en) 1980-08-20
EP0014621B1 EP0014621B1 (en) 1984-01-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800400103 Expired EP0014621B1 (en) 1979-02-12 1980-01-22 Coaxial cable with composite insulation for telecommunication, method for applying the external insulation of such a cable and apparatus for carrying out this method

Country Status (3)

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EP (1) EP0014621B1 (en)
DE (1) DE3066220D1 (en)
FR (1) FR2448771A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102024531A (en) * 2010-12-21 2011-04-20 河南省通信电缆有限公司 Cable longitudinal covering method and mould as well as production method of local cable
CN107460825A (en) * 2017-08-23 2017-12-12 柳州欧维姆机械股份有限公司 A kind of method of PVF films cladding drag-line cable body
CN113963862A (en) * 2021-11-15 2022-01-21 贵州天虹志远电线电缆有限公司 Horizontal wrapping device for cabling machine
CN114446549A (en) * 2022-02-23 2022-05-06 上海申远高温线有限公司 Electric wire wrapping machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR873585A (en) * 1940-07-06 1942-07-13 Hermes Patentverwertungs Gmbh Method of covering electrical conductors with one or more insulating tapes affixed parallel to the axis
US2372645A (en) * 1941-06-13 1945-04-03 Boris J Barmack Guide for applying insulation to conductors
CH268956A (en) * 1946-08-23 1950-06-15 Standard Telephon & Radio Ag Electric power cable and process for its manufacture.
GB1059438A (en) * 1965-11-23 1967-02-22 Standard Telephones Cables Ltd Method of manufacturing an insulated electrical conductor
FR2224844A1 (en) * 1973-04-04 1974-10-31 Lignes Telegraph Telephon

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR873585A (en) * 1940-07-06 1942-07-13 Hermes Patentverwertungs Gmbh Method of covering electrical conductors with one or more insulating tapes affixed parallel to the axis
US2372645A (en) * 1941-06-13 1945-04-03 Boris J Barmack Guide for applying insulation to conductors
CH268956A (en) * 1946-08-23 1950-06-15 Standard Telephon & Radio Ag Electric power cable and process for its manufacture.
GB1059438A (en) * 1965-11-23 1967-02-22 Standard Telephones Cables Ltd Method of manufacturing an insulated electrical conductor
FR2224844A1 (en) * 1973-04-04 1974-10-31 Lignes Telegraph Telephon

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102024531A (en) * 2010-12-21 2011-04-20 河南省通信电缆有限公司 Cable longitudinal covering method and mould as well as production method of local cable
CN102024531B (en) * 2010-12-21 2012-06-27 河南省通信电缆有限公司 Cable longitudinal covering method and mould as well as production method of local cable
CN107460825A (en) * 2017-08-23 2017-12-12 柳州欧维姆机械股份有限公司 A kind of method of PVF films cladding drag-line cable body
CN113963862A (en) * 2021-11-15 2022-01-21 贵州天虹志远电线电缆有限公司 Horizontal wrapping device for cabling machine
CN114446549A (en) * 2022-02-23 2022-05-06 上海申远高温线有限公司 Electric wire wrapping machine
CN114446549B (en) * 2022-02-23 2024-01-19 上海申远高温线有限公司 Wire wrapping machine

Also Published As

Publication number Publication date
EP0014621B1 (en) 1984-01-25
FR2448771B2 (en) 1982-06-04
DE3066220D1 (en) 1984-03-01
FR2448771A2 (en) 1980-09-05

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