EP0431777B1 - Couverture pour tranchées - Google Patents

Couverture pour tranchées Download PDF

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Publication number
EP0431777B1
EP0431777B1 EP19900312505 EP90312505A EP0431777B1 EP 0431777 B1 EP0431777 B1 EP 0431777B1 EP 19900312505 EP19900312505 EP 19900312505 EP 90312505 A EP90312505 A EP 90312505A EP 0431777 B1 EP0431777 B1 EP 0431777B1
Authority
EP
European Patent Office
Prior art keywords
cover
lug
adjacent
latching member
trench
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19900312505
Other languages
German (de)
English (en)
Other versions
EP0431777A1 (fr
Inventor
Peter Spence Clough
Richard Joseph Yeowart
Mansel Moore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Gas PLC
Original Assignee
British Gas PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Gas PLC filed Critical British Gas PLC
Publication of EP0431777A1 publication Critical patent/EP0431777A1/fr
Application granted granted Critical
Publication of EP0431777B1 publication Critical patent/EP0431777B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/06—Gully gratings
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/10—Covering trenches for foundations

Definitions

  • This invention relates to a cover for temporarily covering a trench in a thoroughfare such as a road or footpath, e.g. overnight until work restarts.
  • Trench covers are already in use which consist in elongate plates, usually of steel, which are laid over the trench with the covers being supported by the ground on opposite sides of the trench. Normally a number of such plate covers are used, with the oppositely facing ends being in abutment.
  • the problem with such plate covers is that, even though they are relatively heavy they can be moved transversely of the trench by vibration imparted by the movement of traffic (vehicles or people) over the plate covers. If the transverse movements are too great there is the risk that one or more plate covers will be tipped into the trench.
  • the work persons can either inset the covers in the road or path surface or use rubble or asphalt to provide stops. Even when such precautions are taken, these plate covers can still be worked loose, e.g. by heavy vehicular traffic.
  • FR-A-865 707 discloses a method of constructing landing strips for aircraft in which plates are described each of which might be considered as being suitable as a cover for temporarily covering a trench.
  • FR-A-865 707 discloses a cover for temporarily covering a trench of the type (hereinafter called the type referred to) comprising a generally planar cover member, said cover member having at each of two opposite sides a lateral edge extending along each said opposite side, said cover member having first and second opposite ends each extending across the cover member transversely to said lateral edges from one said lateral edge to the other, a hook-shaped first lug at said first end and a second lug at said second end, both said lugs extending in substantially the same direction out of the plane of the cover member and so arranged that when the plane of said cover member is disposed substantially horizontally with said first and second lugs below the cover member said first and second lugs depend from the cover member, said first lug providing a male latching member, said second lug having
  • landing strip plates as disclosed with reference to Figs 1 to 3 in FR-A-865 707, if used as trench covers would suffer from the disadvantages that the second lugs which extend transversely across the whole width of the plates will hold the plates off the ground by a significant distance or step, and also traffic could cause the covers to move transversely off the trench to uncover the latter.
  • Landing strip plates as described with reference to Figs 4 and 5 of FR-A-865 707, have a wholly flat underface, and if used as trench covers would also suffer from the usual disadvantage that traffic could cause the covers to move transversely off the trench to uncover it.
  • An object of the invention is to provide a cover for temporarily covering a trench in which the aforesaid disadvantages are minimized or avoided.
  • a cover of the type referred to is characterised in that said cover member has a central portion extending to each of said two opposite sides into a respective lateral edge portion extending along the length of the cover member and has a said lateral edge extending along a side of each lateral edge portion remote from an adjacent said side of the cover member, said first lug has a width dimension along the transverse direction of said cover at said first end whereby said first lug has two spaced opposite side edges each disposed nearer the middle of said first end than a said lateral edge proximate said side edge such that the side edge is spaced back from said proximate lateral edge and depends when said first lug is in a dependent attitude, said second lug has a width dimension along the transverse direction of said cover at said second end whereby said second lug has two spaced opposite side edges each disposed nearer the middle of said second end than a said lateral edge proximate said side edge such that the side edge is -spaced back from said proximate lateral edge and depends
  • each of the second lugs is of sufficient width that, no matter how far the cover assembly is pushed in any one lateral direction, a said side edge of each said second lug on one side of the trench will abut against the trench wall on that side before the lateral edges of the cover members at the opposite side of the cover assembly are pushed clear of the adjacent wall of the trench on the opposite side.
  • the width of the cover and the second lug must be suitable for the particular width of the trench.
  • the distance between the lateral edge of the cover and the wall of the trench on one side should be chosen to be greater than the distance between the wall of the trench and the side edge of the second lug at the other side.
  • any cover i.e. an intermediate or end cover
  • any cover can be picked up to release it from adjacent covers, preferably to improve security, for example, the releasable engagement between the said male latching member on one said cover and the female latching member of an adjacent cover holds said adjacent covers so close together that any gap between the adjacent ends of the engaged covers is smaller than the distance needed to allow the male latching member to be withdrawn from the aperture of the female latching member, such that one said cover can only be disengaged from the adjacent said cover by picking up the one said cover at a free end of the assembly of engaged covers, and whereby any said cover occupying an intermediate position in the assembly cannot be removed.
  • the aperture may be a slot or a laterally opening recess.
  • a hook portion of the male latching member on said first cover can lie adjacent to or touch the bottom of the aperture of the female latching member on an adjacent second said said cover engaged with the said first cover.
  • the member In order to release an end cover from an adjacent cover, i.e. unlatch the first lug from its enlatchment with a second lug of the adjacent cover, the member is provided with a key hole which can be engaged with a lifting hook to lift the end cover out of the general plane of the cover assembly so that the free end of the first lug can be pulled through the aperture in the second lug and the cover lifted away from the trench.
  • the second lug is preferably shaped laterally to receive spacer elements to laterally extend the width of the second lug.
  • the lateral shaping may be recesses, e.g. in the form of grooves which receive tongues on the spacer elements.
  • the covers which are conveniently of rectangular shape may be made in a number of widths, e.g. 160mm, 190 mm and 220 mm to cater for different widths of trench. Ideally the width of the cover should be no more than 40 mm greater than the width of the trench. Whilst the length of the covers can be as desired, a suitable length is 500 mm.
  • the cover may be made of any suitable material, such as steel, consistent with providing the requisite strength to support heavy vehicles passing over it: but preferably in order to reduce weight and protect any metal from corrosion, e.g. steel from rusting, the whole cover including the cover member and the releasable engagement is made of metal reinforced plastics.
  • the cover has a pressed-steel core or base around which the plastics material is moulded, with the cover member being preferably of corrugated shape to increase strength.
  • the cover advantageously has tapering lateral edges to form ramps, and optionally to increase grip, the cover is provided with a tread pattern on its top surface.
  • the tread pattern may have variations in depth.
  • a cover which is generally indicated at 1 for temporarily covering a trench 2 having opposite walls 2' e.g. in a road 3, by a cover member 4 thereof extending over, and resting on the ground on opposite sides respectively of the trench.
  • the cover 1 is releasably engageable with other adjacent covers 1a and 1b, partly shown in chain lines in Fig. 3, by means of male and female latching members in the form of hook-shaped and apertured lugs 5 and 6 respectively to form an assembly of covers 7 of which one cover of the assembly can be disengaged from an adjacent cover only by moving a cover out of the general plan of the assembly.
  • the lugs 5 and 6 (Fig.
  • the cover member 4 has at two opposite sides tapering lateral edge portions extending from said sides and forming ramps 10 to facilitate the passage of traffic over the cover when in position covering a trench.
  • a lateral edge 10' extends along a side of each lateral edge portion 10 remote from the adjacent side of the cover member 4.
  • the top surface of the cover member 4 including the ramps 10 and the area 11 lying between the ramps is provided with a tread pattern 12 which is at a minimum as indicated by the reference 13 and at a maximum, as indicated by the reference 14.
  • the cover has a pressed steel base or core 15 extending throughout the cover member 4 and the lugs 5 and 6, with the base 15 in the region of the cover member 4 being corrugated to increase strength.
  • a plastics material 16 is moulded with the plastics material providing the ramps 10 and the tread pattern 12.
  • the hook-shaped lug 5 has a straight portion 20 depending perpendicularly from the end region 8 and a hook portion 21 projecting outwardly beyond the end region 8.
  • the apertured lug 6 Depending perpendicularly from the other end region 9 of the cover member 4 is the apertured lug 6 whose aperture is in the form of an elongate slot 22 extending transversely of the cover 1, as will be apparent from Fig. 2.
  • the aperture 22 is in a plane transverse to the plane of the cover member 4, and the aperture has a height such as to allow the cover 1 to be engaged with another such cover in a manner to be described.
  • the lug 6 has lateral recesses in the form of grooves 23 for receiving tongues (not shown) of at least one spacer element (not shown). The or each spacer element laterally extends the width of the lug 6 to enable a narrower width cover to be positioned over a slightly wider trench than usual, as indicated by the chain lines 26 to avoid the cover from being tipped into the wider trench.
  • a key hole 27 is provided in the cover member 4 adjacent the end region 8 with the hook-shaped lug 5, for use with a lifting hook (not shown).
  • the side edges 5' of the lug 5 are each spaced back from the adjacent lateral edge 10'.
  • the lug 6 has opposite side edges 28 each spaced back from the adjacent lateral edge 10'. This means that a cover can be placed over a trench 2 with the lugs 5, 6 depending into the trench and the lateral edge portions 10 resting on the ground or road 3 alongside the trench. In order temporarily to cover the trench 2 shown in the road 3 (see Fig.
  • the width of the covers 1, 1a and 1b is chosen such that the distances (y) between the wall 2' of the trench and the edge 10' of the cover on one side is greater than the distance (z), between the side edge 28 of the lug 6 and the wall of the trench on the other side. If these distances are not right then one or two said spacer elements can be used. Then the cover 1 is brought to the trench and the end region 8 titled downwards so that the hook portion 21 of the hook-shaped lug 5 can be passed through the aperture 22a in the lug 6a.
  • the end region 9 of the cover 1 is lowered so that the horizontal part 29 of the hook portion touches, or lies close the bottom of the aperture 22a and the vertical part 30 of the hook portion 21 abuts against the lug 6a beneath the aperture 22a to latch the two covers 1a and 1 together.
  • the last cover 1b having a hook-shaped lug 5b which mates with the aperture 22 of the cover 1 is then latched to the cover 1 in a similar manner to that described for covers 1 and 1a, to complete the cover assembly 7 for covering the trench 2.
  • the nature of the interengaging lugs is such that only small non-dangerous gaps 31 are left between the adjacent ends of the covers. It will be apparent from Fig. 3 that the intermediate cover cannot be moved in view of the enlatchment of the lugs 5, 6a and 5b, 6 and the smallness of the gaps 31.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sewage (AREA)

Claims (14)

  1. Couverture (1) destinée à recouvrir temporairement une tranchée (2) et consistant en un élément de couverture sensiblement plan (4), ledit élément de couverture (4) ayant sur chacun de deux côtés opposés un bord latéral (10') disposé le long de chacun desdits côtés opposés, ledit élément de couverture (4) comprenant des première et seconde extrémités opposées (8, 9) dont chacune est disposée en travers de l'élément de couverture perpendiculairement auxdits bords latéraux (10') de l'un desdits bords latéraux à l'autre, une première patte (5) en forme de crochet située à ladite première extrémité (8) et une seconde patte (6) disposée à ladite seconde extrémité (9), lesdites deux pattes (5, 6) étant orientées sensiblement dans la même direction vers l'extérieur du plan de l'élément de couverture (4) et étant disposées de façon que, lorsque le plan dudit élément de couverture (4) est placé sensiblement horizontalement de manière que lesdites première et seconde pattes (5, 6) soient sous ledit élément de couverture, lesdites première et seconde pattes s'étendant vers le bas depuis l'élément de couverture, ladite première patte (5) constituant un élément mâle de verrouillage, ladite seconde patte (6) comportant un trou (22) qui la traverse et qui constitue un élément femelle de verrouillage, et ledit élément mâle de verrouillage (5) placé sur ladite couverture (1) pouvant s'ajuster de manière amovible dans le trou (22) de l'élément femelle de verrouillage (6) d'une autre couverture voisine (1a) de manière à engager ledit élément femelle de verrouillage (6) lorsqu'il est placé dans le trou (22) de ce dernier, de façon que, dans un assemblage (1b, 1, 1a) de couvertures engagées entre elles, l'une desdites couvertures de l'assemblage (1a, 1, 1b) puisse être dégagée de la couverture voisine uniquement par déplacement de l'une desdites couvertures de façon qu'elle ressorte du plan général de l'assemblage, caractérisée en ce que ledit élément de couverture (4) comprend une partie centrale (11) se prolongeant sur chacun desdits deux côtés opposés en une partie respective de bord latéral (10) située sur la longueur de l'élément de couverture (4), celui-ci ayant l'un desdits bords latéraux (10') disposé le long d'un côté de chaque partie de bord latéral (10) distante de l'un, voisin, desdits côtés de l'élément de couverture (4), ladite première patte (5) ayant le long de la direction transversale de ladite couverture (10), à ladite première extrémité (8), une dimension en largeur telle que ladite première patte (5) comporte deux bords latéraux opposés (5') distants l'un de l'autre et dont chacun est disposé plus près du milieu de ladite première extrémité (8) que l'un desdits bords latéraux (10') qui est proche dudit bord latéral (5') de façon que le bord latéral (5') soit en retrait par rapport audit bord latéral proche (10') et soit orienté vers le bas lorsque ladite première patte (5) est tournée vers le bas, ladite seconde patte (6) ayant le long de la direction transversale de ladite couverture (1), à ladite seconde extrémité (9), une dimension en largeur qui est telle que ladite seconde patte (6) comporte deux bords latéraux opposés (28) placés à distance l'un de l'autre et dont chacun est plus proche du milieu de ladite seconde extrémité (9) que l'un desdits bords latéraux (10') qui est proche dudit bord latéral (28) de façon que le bord latéral (28) soit en retrait par rapport audit bord latéral proche (10') et soit orienté vers le bas lorsque ladite seconde patte (6) est tournée vers le bas, lesdits bords latéraux en retrait (5', 28) permettant à la couverture (1) d'être placée sur une tranchée (2) ayant une largeur au moins égale à la dimension de la largeur de la seconde patte (6), mais inférieure à la dimension transversale de ladite couverture (1) à partir de l'un desdits bords latéraux (10'), de façon que les deux première et seconde pattes (5, 6) se logent toutes deux dans ladite tranchée (2) et permettent auxdites parties latérales de bord (10') de reposer sur le sol (3), sur les côtés opposés respectifs de la tranchée (2) sur laquelle ladite couverture (1) est placée, le trou (22) de ladite seconde patte (6) étant disposé dans un plan qui est transversal au plan de l'élément de couverture (4) et, lorsque la première patte (5b) d'une première couverture (1b) est ajustée dans le trou (22) de la seconde patte (6) d'une seconde couverture voisine (1) et engage cette seconde patte (6), ladite première patte (5b) s'applique contre une surface de ladite seconde patte (6), ladite surface étant tournée à l'écart de l'emplacement général de l'élément de couverture (4) de la première couverture (1b) et le trou (22) étant dimensionné de manière à permettre à ladite première patte (5b) d'être enlevée par un mouvement de ladite première couverture (1b) qui l'écarte du plan général de l'assemblage (1b, 1) de couvertures engagées entre elles pour la dégager de ladite surface afin de permettre de retirer la première patte (5b) du trou (22) pour provoquer un dégagement de ladite première couverture (1b) de la seconde desdites couvertures (1).
  2. Couverture selon la revendication 1, caractérisée en ce que l'enclenchement amovible entre ledit élément mâle de verrouillage (5b) de l'une desdites couvertures (1b) et ledit élément femelle de verrouillage (6) d'une couverture voisine (1) retient ladite couverture voisine suffisamment près pour que tout intervalle (31) entre les extrémités voisines (8, 9) des couvertures enclenchées soit plus petit que la distance nécessaire à permettre à l'élément mâle de verrouillage (5b) d'être retiré du trou (22) de l'élément femelle de verrouillage (6), de façon que l'une desdites couvertures (1b) ne puisse être dégagée dudit élément de couverture voisin (1) qu'en saisissant ladite couverture (1b) à une extrémité libre de l'assemblage (1b, 1, 1a) de couvertures engagées et qu'ainsi l'une desdites couvertures occupant une position intermédiaire dans l'assemblage (1b, 1, 1a) ne puisse pas être enlevée.
  3. Couverture selon la revendication 1 ou la revendication 2, caractérisée en ce que, en observant les première et seconde pattes (5, 6) occupant une position dans laquelle elles sont tournées vers le bas, une partie en crochet (21) de l'élément mâle de verrouillage (5) de ladite première couverture (1) est placée au voisinage ou touche le fond du trou (22a) de l'élément femelle de verrouillage (6a) situé sur une couverture voisine (1a) engagée avec ladite première couverture (1).
  4. Couverture selon l'une quelconque des revendication 1 à 3, caractérisée en ce que la dimension en largeur de l'élément femelle de verrouillage (6) peut être prolongée latéralement.
  5. Couverture selon la revendication 4, caractérisée en ce que l'élément femelle de verrouillage (6) est conformé de manière à loger des éléments d'entretoisement de façon à prolonger latéralement ladite largeur de l'élément femelle de verrouillage (6).
  6. Couverture selon la revendication 5, caractérisée en ce que l'élément femelle de verrouillage (6) comporte des évidements latéraux (23) pour loger des languettes des éléments d'entretoisement.
  7. Couverture selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'elle comporte un trou de clé (27) dans lequel peut s'engager un crochet de levage pour dégager une première desdites couvertures (1) d'une seconde, voisine, desdites couvertures (1a).
  8. Couverture selon l'une quelconque des revendications 1 à 7, caractérisée en ce qu'elle est réalisée en matière plastique (16) armée de métal (15).
  9. Couverture selon la revendication 8, caractérisée en ce que l'armature de métal consiste en une base d'acier emboutie (15) autour de laquelle la matière plastique (16) est moulée.
  10. Couverture selon l'une quelconque des revendications 1 à 9, caractérisée en ce que les parties latérales de bord sont inclinées de manière à former des rampes (10).
  11. Couverture selon l'une quelconque des revendications 1 à 10, caractérisée en ce qu'elle comporte une surface supérieure comportant une structure (12) de marche et de roulement.
  12. Couverture selon la revendication 11, caractérisée en ce que la structure (12) de marche et de roulement comporte des différences de profondeur.
  13. Couverture selon l'une quelconque des revendications 1 à 12, caractérisée en ce que la couverture (1) est montée sur une tranchée (2), et une distance (y) entre ledit bord latéral (10¹) de la couverture (1) et une paroi voisine (2¹) de la tranchée (2) est supérieure à une distance (z) comprise entre la paroi opposée (2¹) de la tranchée (2) et l'un voisin desdits bords latéraux (28) de l'élément femelle de verrouillage (6).
  14. Ensemble de couvertures (1) dont chacune est conforme à l'une quelconque des revendications 1 à 13 et qui sont toutes montées sur une tranchée (2), au moins l'une desdites couvertures (1) ayant son élément mâle de verrouillage (5) enclenché dans l'élément femelle de verrouillage (6a) d'une autre, voisine, desdites couvertures (1a).
EP19900312505 1989-12-04 1990-11-16 Couverture pour tranchées Expired - Lifetime EP0431777B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8927346 1989-12-04
GB8927346A GB2238815B (en) 1989-12-04 1989-12-04 Cover for trenches

Publications (2)

Publication Number Publication Date
EP0431777A1 EP0431777A1 (fr) 1991-06-12
EP0431777B1 true EP0431777B1 (fr) 1993-07-21

Family

ID=10667371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900312505 Expired - Lifetime EP0431777B1 (fr) 1989-12-04 1990-11-16 Couverture pour tranchées

Country Status (3)

Country Link
EP (1) EP0431777B1 (fr)
DE (1) DE69002310T2 (fr)
GB (1) GB2238815B (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9303676U1 (de) * 1993-03-12 1993-04-29 Abu-plast Kunststoffbetriebe GmbH, 8633 Rödental Stegelement für begehbaren Abdeckrost
GB9318746D0 (en) * 1993-09-09 1993-10-27 M W Polymer Products Limited Platform assembly
GB2299602B (en) * 1995-04-04 1999-03-17 British Gas Plc Temporary cover for excavations
GB2305954B (en) * 1995-10-04 2000-02-23 British Gas Plc Trench covers
GB9700587D0 (en) * 1997-01-14 1997-03-05 Tarmac Uk Ltd Temporary covers for trenches and other excavations
ES2142217B1 (es) * 1997-02-11 2000-11-01 Palomo Garcia Meliton Sumidero o imbornal hermetico con apertura y cierre automaticos.
GB9905871D0 (en) * 1999-03-16 1999-05-05 Asg Contractors Ltd Improved tile cover
IL148606A0 (en) 1999-09-17 2002-09-12 Byrne David Vincent A trench cover element
GB2374371A (en) * 2001-03-06 2002-10-16 Quantum Covers Ltd Trench cover for use with permanently accessible trenches
WO2002084033A1 (fr) 2001-04-17 2002-10-24 David Vincent Byrne Couverture de tranchee
GB2405895B (en) * 2003-09-09 2006-08-16 Buzz Inc Ltd A cover for temporarily covering a trench
KR100771999B1 (ko) * 2004-05-20 2007-10-31 김상돈 그레이팅
FR2903436A1 (fr) * 2006-07-10 2008-01-11 Alicote Sarl Element utilise pour l'evacuation des eaux pluviales
GB2448371B (en) * 2007-04-14 2012-03-07 Oxford Plastic Sys Ltd Trench cover
NL1033956C2 (nl) * 2007-06-08 2008-12-15 Ballast Nedam Infra B V Werkwijze voor het aanbrengen/verwijderen van een voeg in een uitsparing tussen delen van een wegdek en een inrichting voor het daarbij afdekken.

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
USRE26366E (en) * 1968-04-09 Interlocking grating and framing system for trench drains
DE18459C (de) * W. REDOALL in Finsburg (England) Neuerungen an Einfassungen der Fufswege
FR865707A (fr) * 1940-02-05 1941-05-31 Aire d'atterrissage pour avions
GB1249914A (en) * 1969-01-17 1971-10-13 Oswald Burgess Trench cover
DE8006377U1 (de) * 1980-03-08 1980-07-17 Passavant-Werke Michelbacher Huette, 6209 Aarbergen Abflussrinne mit mehrteiligem einlaufrost
EP0147050B1 (fr) * 1983-11-26 1988-02-24 John Reginald Newton Article composé
FR2581587B1 (fr) * 1985-05-10 1987-09-11 Allibert Sa Procede de fabrication de parois en matiere plastique de grandes dimensions, et de planeite amelioree, et produits obtenus

Also Published As

Publication number Publication date
GB2238815B (en) 1994-02-16
DE69002310T2 (de) 1994-01-05
GB2238815A (en) 1991-06-12
DE69002310D1 (de) 1993-08-26
GB8927346D0 (en) 1990-01-31
EP0431777A1 (fr) 1991-06-12

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