EP0978007A1 - Fermeture d'une epissure de fibres optiques - Google Patents

Fermeture d'une epissure de fibres optiques

Info

Publication number
EP0978007A1
EP0978007A1 EP98917379A EP98917379A EP0978007A1 EP 0978007 A1 EP0978007 A1 EP 0978007A1 EP 98917379 A EP98917379 A EP 98917379A EP 98917379 A EP98917379 A EP 98917379A EP 0978007 A1 EP0978007 A1 EP 0978007A1
Authority
EP
European Patent Office
Prior art keywords
fibre
splice
retaining means
cover portions
closure assembly
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.)
Ceased
Application number
EP98917379A
Other languages
German (de)
English (en)
Inventor
Roger Alaerts
Valere Buekers
Daniel Daems
Jean-Marie Etienne Nolf
Dirk Roosen
Marc Vanonckelen
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.)
Commscope Connectivity Belgium BVBA
Original Assignee
Raychem NV SA
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 Raychem NV SA filed Critical Raychem NV SA
Publication of EP0978007A1 publication Critical patent/EP0978007A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4441—Boxes
    • G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4441—Boxes
    • G02B6/445—Boxes with lateral pivoting cover
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4441—Boxes

Definitions

  • This invention relates to a closure assembly for a splice in one or more fibre optic cables.
  • a fibre optic cable typically comprises a plurality of optical fibres contained within a protective outer sheath, usually with an intermediate mechanical protection layer between the fibres and outer sheath to prevent breakage of the fibres during installation or use of the cable.
  • a protective outer sheath usually with an intermediate mechanical protection layer between the fibres and outer sheath to prevent breakage of the fibres during installation or use of the cable.
  • the resultant exposed optical fibres need to be protected not only against the environment, but also against overbending which could break the fibres or result in signal attenuation. Fibre optic splice closures must therefore be designed to satisfy these needs.
  • Known fibre optic splice closures typically comprise a hollow enclosure containing one or more protective splice trays.
  • the splice trays store the optical fibre splices, and may also store any uninterrupted, but exposed optical fibres.
  • the splice tray may store not only the optical fibre splices but also those fibres bared of outer cable sheath, which have not themselves been spliced.
  • the outer cable sheath is removed to make a splice to optical fibres of a fibre optic cable using a splice closure, it is usual to include within the closure an excess length of bared fibres, both of the spliced fibres, and any uninterrupted fibres. This is to provide for future splicing or other rearrangements to the network. This excess fibre is usually formed into one or more loops and stored in the splice tray in a looped configuration.
  • US 4805979 (Minnesota Mining and Manufacturing Corp) describes a typical known fibre optic splice closure. It comprises a base and a cover which are both in the form of half shells having mating surfaces secured together by bolts. Fixed to the base of the splice closure is one or more splice trays, comprising splice receiving channels extending along the tray, and fibre retaining lips extending around at least part of the edge of the tray.
  • the fibres to be joined are spliced and placed in the splice receiving channels of the splice tray, and the fibres which are not to be spliced, together with excess length of the spliced fibres, are coiled and placed beneath the fibre retaining lips around the periphery of the tray.
  • EP-A-0159857 (Raychem) describes a fibre optic splice closure comprising a base through which cables pass, and a dome shaped closure which fits onto the base. Within the closure are provided a plurality of hinged splice trays for holding the optical fibre splices.
  • the closure is efficient and effective for enclosing a large number of splices, but is somewhat bulky.
  • one or more outer cover portions may comprise a splice storage tray.
  • the present invention provides a closure assembly for encapsulating splices between optical fibres of one or more fibre optic cables, the assembly comprising first and second hollow cover portions having mating surfaces which can be sealed together around the fibre optic cable(s), wherein one or both of the first and second cover portions is provided with splice retaining means for securing the said optical fibre splices.
  • one or both of the cover portions is adapted not only to carry out the function of a cover, but also to act as a splice tray. Since the splice tray function and the enclosure cover function are provided by the same part, the cost of providing separate parts is avoided. Furthermore the resulting enclosure is compact.
  • loose optical fibres refers to the excess lengths of the spliced optical fibres and/or lengths of unspliced optical fibres (sometimes referred to as " express" optical fibres) which are typically included in a fibre optic splice closure.
  • the excess lengths of the spliced fibres are a result of the need to provide sufficient lengths of the fibres in order to carry out the splicing (e.g. fusion splicing) operations, and also in order to provide for future re-splicing etc.
  • unspliced express fibres which are stored in the closure may need to be cut and spliced in the figure.
  • the "loose optical fibres” are preferably contained in tubes, and these tubes are sometimes referred to as “loose tubes” (hence the expression "loose fibres").
  • only one of the first and second cover portions is adapted to be a splice tray for securing the optical fibre splices.
  • the other cover portion is adapted to be a storage tray for storing lengths of loose optical fibres.
  • the other cover portion is adapted to be a storage tray by being provided with loose fibre retaining means, e.g. in the shape of lips or projections.
  • both of the first and second cover portions are adapted to be splice trays for securing the optical fibre splices.
  • both the cover portions are provided with splice retaining means.
  • an additional fibre storage tray is preferably provided for storing any lengths of loose optical fibre, the additional tray being provided with loose fibre retaining means.
  • the first and/or second cover portion may also be provided with loose fibre retaining means (and thereby be adapted to be a storage tray).
  • a cover portion which is adapted to be both a splice tray and a storage tray may store any excess length of the spliced fibres, while storage of unspliced fibres (sometimes also known as "express" fibres) may be accommodated in either the other cover portion, or in an additional, separate storage tray.
  • the cover portions are hollow and have mating surfaces which can be sealed together around the fibre optic cables.
  • the cover portions are generally similar in shape.
  • one or each cover portion is generally elongate, having a substantially flat major surface and side walls extending inwardly from the elongate edges of the flat major surface.
  • the or each cover portion is tapered at one or each of its ends. This arrangement may enhance sealing to the cables.
  • the splice retaining means in the cover portion(s) to adapt it/them to be a splice tray may take any convenient form. Suitable means would be apparent to the man skilled in the art.
  • the cover portion is provided with two upstanding flanges which extend substantially parallel to each other along at least part of their length.
  • Resilient material for example foam, may be provided between the upstanding flanges, into which, in use, the fibre splices are positioned in order to secure them.
  • the resilient material is preferably positioned in a channel shape between the flanges.
  • the separation of the upstanding flanges, and the thickness of the foam, or other resilient material are selected according to the size of the splices so that the resilient material must be compressed slightly in order to insert the splices. This makes it easy for the installer to insert the splices, while retaining them securely in place during service life.
  • the parallel upstanding flanges may be curved or straight, according to what is desired for optimum splice securement.
  • One of the parallel upstanding flanges may be provided by part of the wall of a cover portion.
  • Each cover portion which is adapted to be a splice tray, may be provided with one or more pairs of parallel upstanding flanges in order to accommodate fibre splices.
  • the storage function is preferably provided by lips or projections extending so as to be able to support loose fibre.
  • the lips or projections are loose fibre retaining means.
  • the lips or projections are preferably arranged to support the loose fibre in a looped configuration. This minimises the possibility of damage to the fibres, or attenuation of signal, both of which could result from overbending of the fibres.
  • the cover portions may be secured to each other by any suitable means.
  • the cover portions are preferably pivotally connected, e.g. hinged together.
  • the cover portions are preferably pivotally connected along one longitudinal edge.
  • a pivotal connection means that the two cover portions are held together, and therefore handled as one piece, but allows the cover portions to be opened up completely, e.g. onto a flat surface, allowing easy access to the splice tray region and storage tray region.
  • the separate storage tray is preferably also pivotally connected, e.g. hinged, to the two cover portions.
  • the pivotal connection is preferably such that the two cover portions can be laid out onto a substantially flat surface, and the additional storage tray projects upwards (or downwards) therefrom.
  • the additional storage tray is preferably able to rest in a position substantially perpendicularly to the laid out cover portions. This makes it easy for an installer to access, and work on, the inside of each cover portion and the additional storage tray.
  • This pivotal connection arrangement is preferably provided by a connection plate on which the storage tray is mounted.
  • the connection plate is preferably provided with both pivoting means and sliding means.
  • the pivoting means allow the storage tray to pivot relative to each cover portion, and the sliding means allow the storage tray to slide transversely relative to each cover portion, at least when the storage tray has been pivoted into an orientation when it is substantially parallel to the said cover portion.
  • the sliding mechanism allows the cover portions to move towards each other in order to close the assembly.
  • the pivoting and sliding design provides a splice closure which is compact and easy to handle because it is in one piece, but also one which allows full and easy access to the splice tray and storage tray regions.
  • the preferred pivoting (e.g. hinge) arrangement secures the preferred elongate cover portions along one edge.
  • Securement along the other edge may be provided by any suitable means.
  • the cover portions may be provided with mating projections which snap fit together.
  • the securement means are such as to allow easy reopening for later work on the splice closure.
  • the closure assembly according to the present invention may be shaped to enclose any type of splice, e.g. an in-line splice, a butt splice, or a branch splice.
  • cables project, therefore, from one or both ends of the splice closure.
  • the cover portions In addition to securing the cover portions to each other, the cover portions must be sealed to each other. This may be done in a number of ways, as would be apparent to the man skilled in the art.
  • the mating surfaces of the first and second cover portions are respectively tongue and grooved shaped, and provided with a strip of sealing material within the tongue and groove.
  • This sealing material may, for example, be a rubbe, a gel, a polymeric foam or a combination thereof.
  • there is preferably a seal around the cables where they enter the closure which may also be rubber, gel, polymeric foam etc. Where a gel is used, it is preferably a thermoplastic gel.
  • a preferred polymeric foam is silicone rubber foam.
  • cover portions are preferably connected, e.g. pivotally, to each other for ease of handling, this connection is preferably detachable.
  • cover portions may be provided adapted to be classic in-line splice trays, tap-off trays, storage trays, etc.
  • a second aspect of the invention provides a kit of parts comprising three or more cover portions, any two of which may be used together for forming a closure assembly for optical fibre splices, each cover portion being provided with a mating surface to seal to another of the cover portions, and being adapted to provide different functions in the closure assembly.
  • at least one cover portion in the kit of parts is adapted to be a splice tray.
  • a third aspect of the invention provides a method of encapsulating splices between optical fibres of one or more fibre optic cables using a closure assembly according to the first aspect of the invention, the method comprising:
  • the closure assembly of the present invention is compact and easy to use. Nonetheless it may easily be used to enclose up to about 24 splices, or more.
  • FIGS 1, 2 and 3 are each perspective views showing three different embodiments of closure assembly according to the invention, each in an open configuration;
  • Figure 4 is a cross sectional view through the optical fibre splice retaining region of each of Figures 1 to 3, taken along the line IV - IV of each of Figures 1 to 3;
  • Figure 5 shows the closed configuration of each of the closure assemblies of Figures 1 to 3;
  • Figures 6a and 6b are schematic cross-sectional views showing the assembly of the main component parts of the closure assembly of Figure 2;
  • Figures 7a, 7b, and 7c are schematic cross-sectional views showing the assembled assembly of Figure 6 in closed, partially opened, and fully opened configuration respectively;
  • Figures 8a and 8b are schematic perspective views of part of the main component parts of the closure assembly of Figure 2, showing assembly of those component parts;
  • Figures 9a, 9b and 9c are schematic perspective views showing part of the assembled closure assembly of Figure 8 in closed, partially open, and fully open configurations respectively.
  • FIG. 1 shows a first embodiment of closure assembly according to the present invention, comprising first and second cover portions 2,4 in the form of half shells.
  • the cover portions 2 and 4 have mating surfaces 6 which can be sealed to each other. The manner in which sealing of mating surfaces 6 is carried out is described later.
  • Each cover portion 2,4 is generally elongate and has a substantially flat major surface (not visible in the figure) and side walls 8 extending inwardly from the major surface to the said mating surfaces 6.
  • Cover portion 2 is provided with a pair of parallel elongate, straight, upstanding flanges 10 containing a channel of resilient foam 12 between them.
  • the fibre optic splices 14 are positioned between the upstanding flanges 10,10' and the resilient foam 12 secures the splices firmly in place.
  • the upstanding flanges 10, 10' in combination with the foam 12 therefore provides splice retaining means in the cover portion 2.
  • the securement of the splices by the foam 12 and flanges 10, 10' is described in more detail with reference to Figure 4.
  • one of the upstanding flanges 10' is provided by part of the side wall 8 of the cover portion 2.
  • Cover portion 2 is also provided with lips or projections 16, 18 which store loops of lengths of fibre 20 en-route to the splice region.
  • Cover portion 4 in contrast is not provided with splice retaining means. Instead it is provided with projections 22 which act as loose fibre storage means.
  • the projections 22 hold loops of excess lengths of fibre which are advantageously retained in the splice closure for future rearrangements. Lengths of excess fibre of the spliced fibres may be held in cover portion 4, and/or also lengths of excess unspliced fibre, or so-called "express" fibre.
  • Figure 1 is an in-line splice and two fibre optic cables enter the closure from each end.
  • the cover portion 4 is provided with a sealing material 26, e.g. a gel or rubber to seal around the cables 24.
  • the sealing material 26 contains channels to receive the cables 24.
  • retaining strips 28 are wrapped around the cables to grip the cables and secure them to the cover portions of the closure. The retaining strips 28 also serve to retain the sealing material 26 in place (which is particularly useful when the sealing material is gel).
  • the cover portions 2 and 4 are provided with hinges 30 which allow the cover portions 2 and 4 to be opened and laid flat for easy access.
  • Figure 1 provides a splice closure for an in-line splice where one half shell cover portion 2 is the splice tray, and the other half shell cover portion 4 is the storage tray.
  • the storage tray organisation is on the same plane as the plane of entry of the cables which is simple and avoids cable or fibre over bending.
  • the overall design is compact and easy to use.
  • FIG. 2 shows another embodiment of splice closure according to the invention.
  • cover portions 2 and 4 are provided with splice retaining means 10,12 (not visible in cover portion 4), and a separate storage tray 32 is provided for storing excess length of loose optical fibre.
  • the cables 24 enter the closure in the plane of the organising storage tray, which in the embodiment of Figure 2 is the additional tray 32, and in the embodiment of Figure 1 was the cover portion 4.
  • the cover portions 2 and 4 and the additional tray 32 are hinged at 30 in a manner allowing the cover portions 2 and 4 to be laid out flat, while the additional storage tray 32 projects perpendicular thereto. This hinging mechanism is described in more detail later.
  • the embodiment of Figure 2, as Figure 1 is a two cable in, two cable out, in-line splice.
  • Figure 3 describes another embodiment of splice closure according to the invention. Again, like reference numerals are used to refer to like parts compared to Figures 1 and 2.
  • the splice closure of Figure 3 is for a branch joint, and it joins fibres from a straight main cable 34 to those from two branch cables 36.
  • the cover portion 2 acts as a splice tray.
  • the cables enter the closure in the plane of the cover portion 4.
  • the main cable passes straight through (with fibres tapped of for splicing to the branch cables), and there are no loops of excess fibre stored in the cover portion 4.
  • Figure 4 is a cross-sectional view taken along the line IV-IV of the preceding Figures, showing the splice retaining means.
  • Upstanding flanges 10, 10' contain a channel shaped layer of foam 12, within which is inserted the fibre splice 14.
  • Figure 5 shows the closed closure of Figures 1 to 23.
  • the cover portions 2 and 4 are sealed against each other.
  • the design is very compact, even though the closures of Figure 1 to 3 may be used to contain, for example, up to about 24 splices, or more.
  • Figures 6a and 6b show assembly of the component parts of the assembly of Figure 2, i.e. the assembly comprising cover portions 2 and 4 and a separate storage fray 32.
  • the storage fray 32 is mounted on a connection plate 30 which has two pivot points 40.
  • the connection plate 30 is provided at each end with a resilient projection 42 which can be pushed into and latch against a part 44 on each of the cover portions 2 and 4. By depressing the projection 42, the connection plate 30 can be removed from the latching position, i.e. the connection plate 30, and hence the storage tray 32 is detachably connected to the cover portions 2 and 4.
  • the assembled configuration is shown in Figure 6b. Cover portions 2 and 4 can pivot about points 30 relative to the storage fray 32.
  • Cover portions 2 and 4 can also slide transversely relative to the storage tray 32, i.e. in a direction up and down the page of the figure.
  • the cover portions are shown in the position of maximum spacing from the storage tray 32 in Figure 6b, with the projection 42 on the connection plate 30 abutting against the part 44 on the cover portions 2 and 4.
  • Figures 6a and 6b also illustrate the tongue and groove nature of the mating surfaces of the cover portions 2 and 4, the tongue being indicated by reference number 46 and the groove by reference number 48.
  • a sealing strip 50 e.g. of rubber (e.g. silicone rubber foam), or of gel, or a combination thereof is also included in the groove 48.
  • Figures 7a, 7b and 7c show the assembled parts of Figures 6a and 6b in closed, partially open and fully open position respectively.
  • the cover portions 2 and 4 are first slid transversely relative to the storage tray 32 until the projection 42 on plate 30 abuts the part 44 on the cover 2 or 4. This transverse movement exposes the pivot points 40, and the cover portions 2, 4 can then be pivoted about those points to the position of Figure 7c.
  • This is the fully open position with cover portions 2 and 4 laid flat, and storage fray 32 projecting perpendicularly. This allows easy access.
  • connection of the parts 2, 4 and 32 is advantageous since it allows different combinations of cover parts to be put together to perform different functions, e.g. in-line splicing, branching, storage etc.
  • Figures 8a and 8b are perspective views corresponding to Figures 6a and 6b showing assembly of the component parts of the Figure 2 closure. Like reference numbers refer to like parts, and the discussion of Figures 6a and 6b applies directly.
  • Figures 9a, 9b and 9c are perspective views corresponding to Figures 7a, 7b and 7c showing the assembled parts of Figure 8 in closed, partially open and fully open configurations respectively.
  • Like reference numbers refer to like parts, and the discussion of Figures 7a to 7c applies directly.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Cable Accessories (AREA)

Abstract

Ensemble de fermeture servant à encapsuler des épissures entre des fibres optiques d'un ou de plusieurs câbles de fibres optiques et comprenant une première et une deuxième parties couvercle creuses possédant des surfaces d'accouplement pouvant être scellées autour du ou des câbles de fibres optiques, une ou les deux parties couvercle étant pourvues de moyens de retenue d'épissures servant à fixer lesdites épissures de fibres optiques.
EP98917379A 1997-04-23 1998-04-15 Fermeture d'une epissure de fibres optiques Ceased EP0978007A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9708196 1997-04-23
GBGB9708196.2A GB9708196D0 (en) 1997-04-23 1997-04-23 Fibre optic splice closure
PCT/GB1998/001107 WO1998048308A1 (fr) 1997-04-23 1998-04-15 Fermeture d'une epissure de fibres optiques

Publications (1)

Publication Number Publication Date
EP0978007A1 true EP0978007A1 (fr) 2000-02-09

Family

ID=10811210

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98917379A Ceased EP0978007A1 (fr) 1997-04-23 1998-04-15 Fermeture d'une epissure de fibres optiques

Country Status (18)

Country Link
EP (1) EP0978007A1 (fr)
JP (1) JP2001521644A (fr)
KR (1) KR20010020119A (fr)
CN (1) CN1252870A (fr)
AU (1) AU7061998A (fr)
BR (1) BR9809404A (fr)
CA (1) CA2287350A1 (fr)
GB (1) GB9708196D0 (fr)
HU (1) HUP0002179A2 (fr)
ID (1) ID24558A (fr)
IL (1) IL132168A0 (fr)
NO (1) NO995123D0 (fr)
PE (1) PE69999A1 (fr)
PL (1) PL336293A1 (fr)
RO (1) RO118986B1 (fr)
TR (1) TR199902532T2 (fr)
WO (1) WO1998048308A1 (fr)
ZA (1) ZA983442B (fr)

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GB2367379B (en) 2000-09-27 2004-08-25 Krone Gmbh Opitcal fibre connection housing
GB0812271D0 (en) * 2008-07-04 2008-08-13 Tyco Electronics Raychem Nv Optical comonent organiser
JP4904513B2 (ja) * 2008-09-17 2012-03-28 日本通信電材株式会社 光ケーブル接続用クロージャ
EP2216669B1 (fr) 2009-02-10 2013-06-26 Tyco Electronics Raychem BVBA Boîtier pour assemblage de fibre optique
CN102221735B (zh) * 2010-04-16 2013-07-17 泰科电子(上海)有限公司 光缆接头盒
JP5115774B2 (ja) * 2011-04-18 2013-01-09 Ｎｅｃエンジニアリング株式会社 光ファイバ用クランプ構造
WO2013075175A1 (fr) * 2011-11-23 2013-05-30 Afc Group Pty Ltd Boîtier d'épissage de fibres optiques
JP5425874B2 (ja) * 2011-11-25 2014-02-26 日本通信電材株式会社 光ファイバ接続用クロージャ
JP6021364B2 (ja) * 2012-03-09 2016-11-09 スリーエム イノベイティブ プロパティズ カンパニー 光ケーブル接続用クロージャ
ES2891094T3 (es) 2012-04-03 2022-01-26 CommScope Connectivity Belgium BVBA Caja y organizador de telecomunicaciones
KR101228447B1 (ko) 2012-12-10 2013-02-01 이정민 광드롭케이블 접속함
WO2015066185A1 (fr) * 2013-10-29 2015-05-07 3M Innovative Properties Company Fermeture d'épissures pour fibres optiques
US10663666B2 (en) 2013-12-05 2020-05-26 United States Of America As Represented By The Secretary Of The Navy Flexible, low profile kink resistant fiber optic splice tension sleeve
KR200477972Y1 (ko) * 2014-01-14 2015-08-13 주식회사 에이제이월드 마이크로 덕트 함체
US10509187B2 (en) * 2014-09-23 2019-12-17 Ppc Broadband, Inc. Universal multi-purpose compartmentalized telecommunications box
CN108732700B (zh) * 2018-05-30 2019-12-31 烽火海洋网络设备有限公司 一种海底光缆分支单元
WO2020205188A1 (fr) * 2019-04-01 2020-10-08 Corning Research & Development Corporation Plateau d'épissure de fibres optiques

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US4805979A (en) * 1987-09-04 1989-02-21 Minnesota Mining And Manufacturing Company Fiber optic cable splice closure
JPH04275013A (ja) * 1991-02-28 1992-09-30 Sumitomo Electric Ind Ltd Ｏｐｇｗ接続箱用アダプタ、蓋及びその応用システム
DE4218378C2 (de) * 1992-06-04 1994-06-01 Rose Walter Gmbh & Co Kg Kabelanschlußkasten
JP3471466B2 (ja) * 1995-02-28 2003-12-02 日本電信電話株式会社 クロージャのスリーブのガスケット構造
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Also Published As

Publication number Publication date
RO118986B1 (ro) 2004-01-30
KR20010020119A (ko) 2001-03-15
TR199902532T2 (xx) 2000-02-21
NO995123L (no) 1999-10-21
JP2001521644A (ja) 2001-11-06
CN1252870A (zh) 2000-05-10
AU7061998A (en) 1998-11-13
ZA983442B (en) 1998-11-09
PL336293A1 (en) 2000-06-19
IL132168A0 (en) 2001-03-19
CA2287350A1 (fr) 1998-10-29
PE69999A1 (es) 1999-08-11
HUP0002179A2 (hu) 2000-10-28
ID24558A (id) 2000-07-27
WO1998048308A1 (fr) 1998-10-29
GB9708196D0 (en) 1997-06-11
NO995123D0 (no) 1999-10-21
BR9809404A (pt) 2000-06-13

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