FR2733568A1 - Thermoplastic netting structure tape for buried warning - Google Patents

Thermoplastic netting structure tape for buried warning Download PDF

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Publication number
FR2733568A1
FR2733568A1 FR9504932A FR9504932A FR2733568A1 FR 2733568 A1 FR2733568 A1 FR 2733568A1 FR 9504932 A FR9504932 A FR 9504932A FR 9504932 A FR9504932 A FR 9504932A FR 2733568 A1 FR2733568 A1 FR 2733568A1
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France
Prior art keywords
mesh
tubular structure
netting
strands
longitudinal
Prior art date
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Granted
Application number
FR9504932A
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French (fr)
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FR2733568B1 (en
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Individual
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Individual
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Priority to FR9504932A priority Critical patent/FR2733568B1/en
Publication of FR2733568A1 publication Critical patent/FR2733568A1/en
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Publication of FR2733568B1 publication Critical patent/FR2733568B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/301—Extrusion nozzles or dies having reciprocating, oscillating or rotating parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2028/00—Nets or the like

Abstract

A netting able to be buried with and above an underground pipe, particularly a warning device because of its marking has a lacuma structure of longitudinal and transversal strips and also two parallel opposite sides/panels (8,9). Also claimed is a prodn. unit consisting of an extrusion feed with circular extrusion slot for prodn. of the netting (2) parts of which are cyclically opened and closed by a gate to interrupt the internal flow. A means of folding the tubular structure from the extruder about its dia. is fitted. Pref. the netting is a tubular structure made of thermoplastic with at least one strip (11, 12) placed in the middle of the side (8, 9) being robust and allowing inscription. The folded netting is compressed between valbors (4, 5) and cooled after folding, partic. within a cooling bath.

Description

FILM OU BANDE EN MATIERE THERMOPLASTIQUE
DE STRUCTURE LACUNAIRE ET DISPOSITIF POUR LA
REALISATION DE CELUI-CI.FILM OR STRIP IN THERMOPLASTIC MATERIAL
OF LACUNAR STRUCTURE AND DEVICE FOR THE
REALIZATION OF THIS.

La présente invention concerne le domaine des films ou feuilles en matériau synthétique, notamment thermoplastique, réalisés par extrusion et utilisés comme grillage, filet, et plus particulièrement comme dispositif "avertisseur", destiné au repérage des canalisations souterraines lors de fouilles.The present invention relates to the field of films or sheets of synthetic material, in particular thermoplastic, produced by extrusion and used as a mesh, a net, and more particularly as a "warning" device, intended for locating underground pipes during excavations.

De façon connue, les films de ce type sont réalisés à partir d'une filière extrudant un film continu à la sortie de laquelle l'écoulement de matière est interrompu de manière cyclique par des organes tels que dents ou peignes, de manière à former des évidements : la structure issue de la tête de filière est alors constituée d'une sorte de tube cylindrique comprenant des brins longitudinaux et de brins transversaux parallèles séparés par des évidements.In known manner, films of this type are produced from a die extruding a continuous film at the outlet of which the flow of material is interrupted in a cyclic manner by members such as teeth or combs, so as to form recesses: the structure coming from the die head then consists of a sort of cylindrical tube comprising longitudinal strands and parallel transverse strands separated by recesses.

Généralement, la tête de filière est de forme circulaire et un couteau ou peigne disposé à la suite des organes d'interruption sectionne la structure tubulaire issue du dispositif précédemment décrit. Une fois étirés, ou mono orientés, de tels films sont susceptibles d'être enterrés avec et au-dessus d'une canalisation souterraine en vue de son repérage lors de fouilles ultérieures.Generally, the die head is circular in shape and a knife or comb arranged following the interrupting members cuts the tubular structure from the device described above. Once stretched, or mono oriented, such films are likely to be buried with and above an underground pipe for its location during subsequent excavations.

De tels films, appelés "dispositifs avertisseurs M par leur structure lacunaire, sont aptes à se briser aisément lors des travaux de fouille. Néanmoins, le film évidé doit résister à l'étirement et aux diverse manipulations résultant de la mise en place : il est donc nécessaire de.Such films, called "warning devices M by their incomplete structure, are capable of breaking easily during excavation work. Nevertheless, the hollowed-out film must resist stretching and the various manipulations resulting from the placement: it is therefore necessary to.

prévoir une épaisseur suffisante des brins longitudinaux.provide sufficient thickness of the longitudinal strands.

Par ailleurs, le sectionnement des brins longitudinaux du grillage, lors des travaux de fouille, est aléatoire car les brins se coupent en des endroits différents. De manière à permettre le repérage de la canalisation, un nombre minimal de brins doit rester visible dans la fouille et dans le godet de la pelleteuse.Furthermore, the sectioning of the longitudinal strands of the mesh, during excavation work, is random because the strands intersect in different places. In order to allow the identification of the pipeline, a minimum number of strands must remain visible in the excavation and in the bucket of the excavator.

Dans ce contexte, la présente invention concerne un grillage, notamment du type "dispositif avertisseurS susceptible d'être enterré avec et au-dessus d'une canalisation souterraine, en vue de son repérage, du type de structure lacunaire constituée de brins longitudinaux et transversaux, caractérisé en ce qu'il comporte deux flancs/panneaux parallèles et en regard.In this context, the present invention relates to a grid, in particular of the type "warning device S capable of being buried with and above an underground pipe, for the purpose of locating it, of the type of lacunar structure consisting of longitudinal and transverse strands , characterized in that it has two parallel and facing sides / panels.

Par ailleurs, le doublage de parois accroît le nombre de brins et en facilite le repérage au moment de la fouille.In addition, the lining of walls increases the number of strands and makes it easier to locate them at the time of the search.

Selon une autre caractéristique de l'invention, le grillage est réalisé en matériau synthétique, notamment thermoplastique.According to another characteristic of the invention, the mesh is made of synthetic material, in particular thermoplastic.

De manière avantageuse, il est constitué d'une structure tubulaire pliée sensiblement selon un diamètre.Advantageously, it consists of a tubular structure folded substantially along a diameter.

Le grillage comprend avantageusement au moins un brin central, plus large, de manière à y apposer des inscriptions de toute nature.The grid advantageously comprises at least one central strand, wider, so as to affix inscriptions of all kinds.

L'invention concerne également un dispositif comportant une tête de filière constituée d'une fente d'extrusion circulaire pour la fabrication du grillage, une couronne délimitant une fente en courbe fermée par où s'écoule la matière et des moyens aptes à obturer, de façon cyclique, la fente partiellement et animée d'un mouvement de nutation, alternatif ou rotatif, caractérisé en ce qu'il comprend des moyens aptes à plier la structure tubulaire issue de la tête de filière sensiblement selon un diamètre.The invention also relates to a device comprising a die head consisting of a circular extrusion slot for the manufacture of the mesh, a crown delimiting a slot in a closed curve through which the material flows and means capable of closing, cyclically, the slot partially and animated by a nutation movement, alternating or rotary, characterized in that it comprises means capable of bending the tubular structure coming from the die head substantially along a diameter.

Avantageusement, les moyens de pliage comprennent des moyens de compression sous forme de deux rouleaux quasiment tangents entre lesquels la structure tubulaire défile.Advantageously, the folding means comprise compression means in the form of two almost tangent rollers between which the tubular structure passes.

D'autres caractéristiques et avantages de l'invention ressortiront de la description qui suit et qui est donnée en rapport avec une forme de réalisation particulière, présentée à titre d'exemple non limitatif et représentée au dessin ci-après - la figure 1 représente une vue en plan schématique de
l'appareil de fabrication du grillage de l'invention.Other characteristics and advantages of the invention will emerge from the description which follows and which is given in connection with a particular embodiment, presented by way of nonlimiting example and represented in the drawing below - FIG. 1 represents a schematic plan view of
the apparatus for manufacturing the mesh of the invention.

- la figure 2a représente une vue en plan d'un grillage
connu.- Figure 2a shows a plan view of a grid
known.

- la figure 2b représente une vue en plan du grillage de
l'invention.- Figure 2b shows a plan view of the mesh of
the invention.

Le dispositif 1 de fabrication du grillage selon l'invention représenté à la figure 1 est constitué d'une tête de filière de forme circulaire, de conception connue en soi.The device 1 for manufacturing the mesh according to the invention shown in FIG. 1 consists of a die head of circular shape, of a design known per se.

L'homme du métier pourra se référer au brevet français FR 91.04367 pour plus amples détails concernant la réalisation du dispositif 1. Those skilled in the art can refer to French patent FR 91.04367 for further details concerning the production of the device 1.

La tête de filière comprend des conduits d'amenée de matériaux thermoplastiques à l'état fondu jusqu'à une fente d'extrusion circulaire, disposée dans la partie inférieure de la tête de filière.The die head comprises conduits for supplying thermoplastic materials in the molten state to a circular extrusion slot, arranged in the lower part of the die head.

Un film est extrudé à partir de la fente d'extrusion de la tête de filière. La matière extrudée est interrompue de manière cyclique par une couronne circulaire comportant des dents ou des crans susceptibles d'obturer la fente partiellement. La couronne est animée d'un mouvement de nutation ou alternatif ou rotatif régulier le long de la fente.A film is extruded from the extrusion slot of the die head. The extruded material is interrupted cyclically by a circular crown comprising teeth or notches capable of partially closing the slit. The crown is driven by a nutation or alternating or regular rotary movement along the slit.

Leur dimension et leur répartition dépendent : de la dimension des dents, des distances entre chaque dent, de la vitesse d'écoulement de la matière et de la vitesse de rotation de la couronne, ou de la fréquence des peignes pour un mouvement alternatif.Their size and distribution depend on: the size of the teeth, the distances between each tooth, the speed of flow of the material and the speed of rotation of the crown, or the frequency of the combs for reciprocating movement.

Le film extrudé issu de la couronne se présente donc sous la forme d'une structure 2 tubulaire ajourée. La structure 2 est introduite dans un bac 3 contenant un liquide de refroidissement (eau) . Par opposition aux procédés de fabrication de films connus, la réalisation du film selon la présente invention ne comporte pas d'étape de sectionnement longitudinal. Le dispositif 1 ne comprend donc pas de couteau destiné à ouvrir le tube selon une directrice pour obtenir des bandes/films simples.The extruded film from the crown therefore takes the form of an openwork tubular structure 2. The structure 2 is introduced into a tank 3 containing a cooling liquid (water). In contrast to known film manufacturing methods, the production of the film according to the present invention does not include a longitudinal sectioning step. The device 1 therefore does not include a knife intended to open the tube along a director to obtain simple strips / films.

En revanche, le procédé compte une étape supplémentaire de pliage de la structure tubulaire selon sensiblement un diamètre. Le dispositif comprend à cet effet deux rouleaux 4 et 5 de compression, parallèles et disposés en regard l'un de l'autre et quasiment tangents. Les rouleaux servent également au tirage de la gaine extrudée.On the other hand, the method has an additional step of folding the tubular structure substantially along a diameter. The device comprises for this purpose two compression rollers 4 and 5, parallel and arranged facing one another and almost tangent. The rollers are also used for drawing the extruded sheath.

La structure tubulaire 2 est constituée de deux parois 8 et 9 ajourées, demi-cylindriques, ayant deux brins 6 et 7 longitudinaux et symétriquement opposés communs de largeur plus importante (sensiblement le double).The tubular structure 2 consists of two perforated walls 8 and 9, semi-cylindrical, having two longitudinal and symmetrically opposite strands 6 and 7 of greater width (substantially double).

La structure 2 est insérée entre les rouleaux 4 et 5. De cette manière, les brins longitudinaux 6 et 7 sont pliés, les parois 8 et 9 mises à plat et superposées l'une contre l'autre.The structure 2 is inserted between the rollers 4 and 5. In this way, the longitudinal strands 6 and 7 are folded, the walls 8 and 9 laid flat and superimposed one against the other.

La structure 2 se présente alors sous la forme d'un film comprenant une série de brins longitudinaux parallèles entre eux et reliés par une série de brins transversaux.The structure 2 is then presented in the form of a film comprising a series of longitudinal strands parallel to each other and connected by a series of transverse strands.

Deux brins longitudinaux voisins, tels que par exemple les brins 6 et 10, du fait qu'ils appartiennent à une paroi différente (8, 9), ne sont pas reliés par un brin transversal. Les brins longitudinaux sont joints par des brins trasversaux tous les deux brins longitudinaux.Two neighboring longitudinal strands, such as for example strands 6 and 10, because they belong to a different wall (8, 9), are not connected by a transverse strand. The longitudinal strands are joined by transverse strands every two longitudinal strands.

Le grillage comprend au moins un, et dans la forme de réalisation décrite, deux brins longitudinaux 11 et 12 symétriquement opposés, situés à égale distance des brins 6 et 7 de largeur sensiblement identique, ie sensiblement au milieu du flanc correspondant (8, 9). De cette manière, des inscriptions telles que le nom du fabricant, la conformité aux normes ou autres inscriptions, sont susceptibles d'être apposées sur ces brins.The grid comprises at least one, and in the embodiment described, two longitudinal strands 11 and 12 symmetrically opposite, located at equal distance from the strands 6 and 7 of substantially identical width, ie substantially in the middle of the corresponding flank (8, 9) . In this way, inscriptions such as the name of the manufacturer, compliance with standards or other inscriptions, may be affixed on these strands.

Les brins longitudinaux 6, 7, 11 et 12 présentent par exemple une largeur de 0,5 à 3 cm, la largeur des autres brins longitudinaux allant de 3 mm à 2 cm. La distance entre chaque brin longitudinal est très variable (3 mm à 3 cm). Les brins transversaux, quant à eux, ont une largeur comprise entre 0,5 à 4 mm.The longitudinal strands 6, 7, 11 and 12 have for example a width of 0.5 to 3 cm, the width of the other longitudinal strands ranging from 3 mm to 2 cm. The distance between each longitudinal strand is very variable (3 mm to 3 cm). The transverse strands, meanwhile, have a width of between 0.5 to 4 mm.

La structure obtenue est ensuite étirée ou mono orientée de manière connue. Le grillage double est susceptible d'être utilisé pour repérer une canalisation souterraine ou pour toute autre application. The structure obtained is then stretched or mono oriented in a known manner. The double mesh can be used to locate an underground pipe or for any other application.

Claims (8)

REVENDICATIONS 1 - Grillage, notamment du type dispositif avertisseur,1 - Wire mesh, in particular of the warning device type, susceptible d'être enterré avec et au-dessus d'une likely to be buried with and above a canalisation souterraine, en vue de son repérage, du underground pipeline, for its location, type de structure lacunaire constituée de brins type of gap structure made up of strands longitudinaux et transversaux, longitudinal and transverse, caractérisé en ce qu'il comporte deux flancs/panneaux characterized in that it has two sides / panels (8, 9) parallèles en regard. (8, 9) parallel opposite. 2 - Grillage selon la revendication 1, caractérisé en ce2 - Mesh according to claim 1, characterized in that qu'il est constitué d'une structure (2) tubulaire that it consists of a tubular structure (2) pliée. folded. 3 - Grillage selon l'une des revendications 1 ou 2,3 - mesh according to one of claims 1 or 2, caractérisé en ce qu'il est réalisé en matériau characterized in that it is made of material synthétique, notamment thermoplastique. synthetic, especially thermoplastic. 4 - Grillage selon l'une des revendications précédentes,4 - Mesh according to one of the preceding claims, caractérisé en ce qu'il comprend au moins un brin characterized in that it comprises at least one strand (11, 12), disposé sensiblement au milieu du flanc (11, 12), arranged substantially in the middle of the sidewall correspondant (8, 9) plus large, de manière à y corresponding (8, 9) wider, so that apposer des inscriptions de toute nature. affix inscriptions of any kind. 5 - Dispositif comportant une tête de filière constituée5 - Device comprising a die head made up d'une fente d'extrusion circulaire pour. la a circular extrusion slot for. the fabrication du grillage, d'une couronne délimitant manufacture of the mesh, of a crown delimiting une fente en courbe fermée par où s'écoule la matière a closed curved slot through which the material flows et des moyens aptes à obturer, de façon cyclique, la and means suitable for closing, cyclically, the fente partiellement et animée d'un mouvement de partially slit and animated by a movement of nutation, ou alternatif ou rotatif, nutation, or alternative or rotary, caractérisé en ce qu'il comprend des moyens aptes à characterized in that it comprises means suitable for plier la structure tubulaire issue de la tête de bend the tubular structure from the head filière sensiblement selon un diamètre.  die substantially along a diameter. 6 - Dispositif selon la revendication 5, caractérisé en6 - Device according to claim 5, characterized in ce que les moyens de compression se présentent sous what the compression means are under la forme de deux rouleaux (4, 5) quasiment tangents the shape of two almost tangent rollers (4, 5) entre lesquels la structure tubulaire défile. between which the tubular structure passes. 7 - Dispositif selon l'une des revendications 5 ou 6,7 - Device according to one of claims 5 or 6, caractérisé en ce qu'il comprend des moyens de characterized in that it includes means for refroidissement de la structure extrudée. cooling of the extruded structure. 8 - Dispositif selon la revendication 7, caractérisé en8 - Device according to claim 7, characterized in ce que les moyens de refroidissement se présentent what the cooling means are presenting sous la forme d'un bac (3) contenant un liquide de in the form of a container (3) containing a liquid refroidissement.  cooling.
FR9504932A 1995-04-25 1995-04-25 FILM OR STRIP IN THERMOPLASTIC MATERIAL WITH A GAP STRUCTURE AND DEVICE FOR THE PRODUCTION THEREOF Expired - Fee Related FR2733568B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9504932A FR2733568B1 (en) 1995-04-25 1995-04-25 FILM OR STRIP IN THERMOPLASTIC MATERIAL WITH A GAP STRUCTURE AND DEVICE FOR THE PRODUCTION THEREOF

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9504932A FR2733568B1 (en) 1995-04-25 1995-04-25 FILM OR STRIP IN THERMOPLASTIC MATERIAL WITH A GAP STRUCTURE AND DEVICE FOR THE PRODUCTION THEREOF

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FR2733568A1 true FR2733568A1 (en) 1996-10-31
FR2733568B1 FR2733568B1 (en) 1997-06-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1422349A1 (en) * 2002-11-21 2004-05-26 Tenax S.p.A. Sheet-like element with customizing elements, highlighting elements, reflective elements, lettering, characters and the like particularly for building-yard use and for delimiting spaces
WO2014020270A1 (en) * 2012-08-01 2014-02-06 Mdb Texinov High-strength grid with reinforced bonding for buried networks or devices
WO2014121351A1 (en) * 2013-02-06 2014-08-14 Carton Etienne Protection device for a buried element

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140797A1 (en) * 1983-09-06 1985-05-08 Plymouth Francaise Material for visually indicating underground cable runs
EP0239510A1 (en) * 1986-03-19 1987-09-30 Plymouth Francaise Device for announcing the presence of underground pipelines
FR2642818A1 (en) * 1989-02-08 1990-08-10 Eurextrusion Sa Device in elongate web form for identifying buried works, particularly non-metallic ones
FR2644248A1 (en) * 1989-03-07 1990-09-14 Hureau Jacques Improvements to buried grids for locating underground pipelines
EP0512877A1 (en) * 1991-04-10 1992-11-11 S A M E X Method and apparatus for the continuous manufacturing of thermoplastic films or sheets with a net structure
FR2703704A1 (en) * 1993-04-07 1994-10-14 Courant Ets Sa Warning and signalling meshes and extrusion head for the manufacture of such a mesh made of thermoplastic material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140797A1 (en) * 1983-09-06 1985-05-08 Plymouth Francaise Material for visually indicating underground cable runs
EP0239510A1 (en) * 1986-03-19 1987-09-30 Plymouth Francaise Device for announcing the presence of underground pipelines
FR2642818A1 (en) * 1989-02-08 1990-08-10 Eurextrusion Sa Device in elongate web form for identifying buried works, particularly non-metallic ones
FR2644248A1 (en) * 1989-03-07 1990-09-14 Hureau Jacques Improvements to buried grids for locating underground pipelines
EP0512877A1 (en) * 1991-04-10 1992-11-11 S A M E X Method and apparatus for the continuous manufacturing of thermoplastic films or sheets with a net structure
FR2703704A1 (en) * 1993-04-07 1994-10-14 Courant Ets Sa Warning and signalling meshes and extrusion head for the manufacture of such a mesh made of thermoplastic material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1422349A1 (en) * 2002-11-21 2004-05-26 Tenax S.p.A. Sheet-like element with customizing elements, highlighting elements, reflective elements, lettering, characters and the like particularly for building-yard use and for delimiting spaces
WO2014020270A1 (en) * 2012-08-01 2014-02-06 Mdb Texinov High-strength grid with reinforced bonding for buried networks or devices
FR2994200A1 (en) * 2012-08-01 2014-02-07 Mdb Texinov HIGH-STRENGTH REINFORCED CONNECTION GRID FOR NETWORKS OR BURIED DEVICES
RU2639068C2 (en) * 2012-08-01 2017-12-19 Мдб Тексинов Geotextile mesh with high mechanical resistance and reinforced connection for networks or devices laid in ground
WO2014121351A1 (en) * 2013-02-06 2014-08-14 Carton Etienne Protection device for a buried element
BE1020918A3 (en) * 2013-02-06 2014-09-02 Carton Etienne PROTECTIVE DEVICE FOR BUTTER ELEMENT.

Also Published As

Publication number Publication date
FR2733568B1 (en) 1997-06-13

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