JPS63253316A - Production of spacer-type optical fiber cable - Google Patents
Production of spacer-type optical fiber cableInfo
- Publication number
- JPS63253316A JPS63253316A JP63039607A JP3960788A JPS63253316A JP S63253316 A JPS63253316 A JP S63253316A JP 63039607 A JP63039607 A JP 63039607A JP 3960788 A JP3960788 A JP 3960788A JP S63253316 A JPS63253316 A JP S63253316A
- Authority
- JP
- Japan
- Prior art keywords
- spacer
- optical fiber
- colored
- fiber cable
- type optical
- 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.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 125000006850 spacer group Chemical group 0.000 claims abstract description 67
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 17
- 239000000049 pigment Substances 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 4
- 238000004040 coloring Methods 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4489—Manufacturing methods of optical cables of central supporting members of lobe structure
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はスペーサ形多心光ファイバケーブルにおいて、
スペーサ内に収納され次光ファイバ心線の識別を容易な
らしめる構造のスペーサからなる光ファイバケーブルの
製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a spacer type multi-core optical fiber cable,
The present invention relates to a method of manufacturing an optical fiber cable including a spacer that is housed within the spacer and has a structure that makes it easy to identify the next optical fiber core.
多心構造の光ファイバケーブルにおいて、第１１明断面
図に示すように、プラスチック線状体の外周に複数個の
空洞部２を設けたスペーサ１の空洞内に光ファイバ心線
３１に収納したものが知られている。In an optical fiber cable with a multi-core structure, as shown in the 11th bright sectional view, an optical fiber core 31 is housed in a cavity of a spacer 1 which has a plurality of cavities 2 on the outer periphery of a plastic linear body. It has been known.
一方、多心光ファイバケーブルにおいては、光ファイバ
心線を容易に識別可能な構造にすることにより、特にケ
ーブル布設時の接続作業などを効率的に行なうことが５
ｒ能となり、その経済的メリットは美大である。On the other hand, in the case of multi-core optical fiber cables, it is possible to perform connection work especially during cable installation more efficiently by creating a structure in which the optical fiber cores can be easily identified.
The economic merit of this is that it is an art university.
この識別を可能ならしめる具体的方法として、通常は光
ファイバ心線の二次被覆材料に着色顔料を混合して押出
′ＭＬ覆する方法が用いられる。As a specific method for making this identification possible, a method is usually used in which a colored pigment is mixed into the secondary coating material of the optical fiber core and then extruded.
ま九個の方法として、断面Ｖ形のテープ内に心線を収容
し、Ｖ形テープの頂点を全て中心軸に向けて放射状に集
合撚合せてなる光ファイバケーブルにおいて、Ｖ形テー
プを全て各々異なる色としてＶ形テープ相互を識別する
方法も提案されている（特開昭５５−１２４１１０号）
。As nine methods, in an optical fiber cable in which the core wires are housed in a tape with a V-shaped cross section, and all the vertices of the V-shaped tape are twisted radially toward the central axis, all the V-shaped tapes are individually twisted. A method of distinguishing between V-shaped tapes using different colors has also been proposed (Japanese Patent Laid-Open No. 124110/1982).
.
しかし、前記の従来法においてはそれぞれ次のような欠
点がみとめられる。まず前者の方法における欠点の１つ
には着色被覆され次光ファイバ心線はケーブル内の一定
の空洞部に設置する必要があり、配列の自由度がなくな
る次め展蚕効率が著しく低下することがある。まｔ二次
被覆材料に顔料を混合させることにより、光ファイバ心
線の伝送特性が、特に温度変化に対して不安定になる場
合がある。However, each of the above conventional methods has the following drawbacks. One of the disadvantages of the former method is that the optical fiber coated with a colored coating must be installed in a certain cavity within the cable, which eliminates the degree of freedom in arrangement, and secondly, the spreading efficiency is significantly reduced. There is. Also, by mixing pigments into the secondary coating material, the transmission characteristics of the optical fiber may become unstable, especially with respect to temperature changes.
後者の方法の場合にも各心線の識別は心線被覆の色によ
って行なうか、Ｖ形テープ内での配列の安定性（整然性
）によるかしなければならなかつ几。Even in the case of the latter method, each conductor must be identified by the color of the conductor coating or by the stability (orderliness) of the arrangement within the V-shaped tape.
以上のような現状に鑑み、本発明の目的は心線被覆によ
らず、確実に効率よく心線の識別を行い得るスペーサ形
光ファイバケーブルの製造方法を提供することにある。In view of the above-mentioned current situation, an object of the present invention is to provide a method for manufacturing a spacer-type optical fiber cable that can reliably and efficiently identify the core wires regardless of the core sheathing.
本発明はプラスチック線状体の外周に複数の外部に開口
した空洞部を設は九スペーサの空洞内に光ファイバ心線
を収納した構造の光ファイバケーブルにおいて、スペー
サ本体と異なる色の材料をスペーサ本体と一緒に押出成
型し一体化することによりスペーサに着色することｔ−
特徴とするスペーサ形光ファイバケーブルの製造方法に
関する。The present invention provides an optical fiber cable having a structure in which a plurality of cavities open to the outside are provided on the outer periphery of a plastic linear body, and a cored optical fiber is housed in the cavity of a nine-spacer. Coloring the spacer by extrusion molding and integrating it with the main body
The present invention relates to a method for manufacturing a spacer type optical fiber cable.
本発明の特に好ましい実施態様としては、前記スペーサ
本体と異なる色の材料が着色紐、着色顔料又はスペーサ
の空洞と同一数の放射状開口部を有し、その開口部の一
部がスペーサ本体と異なる色である補強部材である上記
方法が挙げられる。In a particularly preferred embodiment of the invention, the material of a different color from the spacer body has the same number of radial openings as colored strings, colored pigments or cavities of the spacer, and some of the openings are different from the spacer body. The above-mentioned method is mentioned in which the reinforcing member is a color.
以下、図面を参照して本発明の詳細な説明する。Hereinafter, the present invention will be described in detail with reference to the drawings.
本発明は第１１図に示したプラスチック線状体の外周に
複数の外部に開口し次空洞部２を設けたスペーサ１の空
洞内に光ファイバ心線５を収納した構造の光ファイバケ
ーブルにおいて、スペーサ１の円中心部以外の場所に、
心線が識別できるように着色部を設けてなるスペーサ形
光ファイバケーブルの製造方法に関するものである。The present invention relates to an optical fiber cable having a structure in which an optical fiber core 5 is housed in a cavity of a spacer 1 which has a plurality of openings to the outside and a hollow part 2 provided on the outer periphery of a plastic linear body shown in FIG. In a place other than the center of the circle of spacer 1,
The present invention relates to a method for manufacturing a spacer-type optical fiber cable in which a colored portion is provided so that the core wires can be identified.
スペーサの外周部又は円中心部以外の内部に着色するに
はスペーサ本体と異なる色の材料をスペーサ本体と一緒
に押出成形一体化する方法で簡単に製造できる。Coloring the inside of the spacer other than the outer periphery or the center of the circle can be easily manufactured by integrally extruding a material of a different color from the spacer body together with the spacer body.
本発明において、着色は後述のように、スペーサ本体と
色の異なる材料として例えば着色紐の挿入、着色顔料、
スペーサの中心部に設けた着色補強材等を用い、スペー
サ本体と押出成形することによってスペーサの羽根部、
空洞部、内部等に行うことができる。これによって基準
心線が定ｔ５、その撚り方向から収納ファイバの心線数
に関係なく、全ての光ファイバ心線上識別することが可
能となるものである。着色場所数は１箇所以上いずれの
整数でもかまわないが、経済性からは少ない方がよく、
２箇所としかつ七の色を変えるとその撚り方向性等がか
なり明確となって好ましい。In the present invention, coloring is carried out by inserting colored strings, using colored pigments, etc. as materials having a different color from the spacer main body, as described below.
By using a colored reinforcing material provided in the center of the spacer and extruding it with the spacer body, the wing part of the spacer,
It can be performed inside a cavity, etc. This makes it possible to identify all optical fibers based on the reference fiber at a constant t5 and the twist direction, regardless of the number of fibers in the housed fibers. The number of colored locations can be any integer greater than or equal to 1, but from an economic standpoint, it is better to have fewer locations.
It is preferable to use two locations and change the color of the second part because the direction of the twist becomes quite clear.
本発明によるスペーサ形光ファイバケーブルの製造方法
は押出成温による簡単な工程でスペーサと一緒に着色部
を設けるため光ファイバ心線には着色していないので、
ケーブル製造効率が大巾に改善されると共に、光ファイ
バ心線の伝送特性も安定化するという効果を奏するもの
である。ま交着色材の種類、材質の制約がなく安価であ
るという利点も有する。The method for manufacturing a spacer-type optical fiber cable according to the present invention uses a simple extrusion heating process to provide a colored portion together with the spacer, so the optical fiber core wire is not colored.
This has the effect of greatly improving cable manufacturing efficiency and stabilizing the transmission characteristics of the optical fiber. It also has the advantage of being inexpensive because there are no restrictions on the type or material of the colorant.
次に本発明の実施態様を第１図〜第１０図を用いて説明
する。Next, embodiments of the present invention will be described using FIGS. 1 to 10.
第１図〜第４図は着色紐を用いて着色部を設は次側で、
着色紐はスペーサの羽根部、空洞鳳中央部等の内部に着
色部を設ける場合に好ましく通用される。着色部４の数
は第１＃２図のように１箇所でもよく、また第３，４図
のように２箇所あるいはそれ以上でもよい。１箇所の場
合、第１図のように例えば羽根部の中央部を外しでどち
らかの側に片よらせることが、また複数箇所の場合には
各々青と赤のように色を変えることが、撚り方向性基準
心線の定め方において、より有効であり、複数箇所の場
合、図のように隣接する場所だけでなく、心線が識別で
きるかぎり、どのような場所でもよい。In Figures 1 to 4, the colored part is set on the next side using colored string.
The colored string is preferably used when a colored part is provided inside the wing part of the spacer, the hollow center part, etc. The number of colored portions 4 may be one as shown in FIG. 1#2, or two or more as shown in FIGS. 3 and 4. In the case of one location, for example, the center part of the blade can be removed and shifted to either side as shown in Figure 1, and in the case of multiple locations, the colors can be changed such as blue and red for each part. This is more effective in determining the twist directionality reference core wire, and in the case of multiple locations, it may be any location as long as the core wires can be identified, not just adjacent locations as shown in the figure.
この構造のスペーサは、スペーサ本体の押出成形時に着
色紐を挿入することによって容易に実現できる。ただし
スペーサの空洞部はケーブルに可撓性をもたせるｔめに
長さ方向に一定ピッチで回転しており、挿入される着色
紐も空洞部の回転と同一ピッチで回転させる必要がある
。A spacer having this structure can be easily realized by inserting a colored string during extrusion molding of the spacer body. However, the cavity of the spacer rotates at a constant pitch in the length direction in order to provide flexibility to the cable, and the colored string to be inserted must also rotate at the same pitch as the cavity rotates.
図では空洞部が４つの場合を示しているが、これに限定
されるものでなく、後の例でもこの空洞部数については
同様のことがいえる。Although the figure shows a case where there are four cavities, the present invention is not limited to this, and the same can be said about the number of cavities in later examples.
この例では、着色紐を用いるため、更に次のような効果
を奏するものである。In this example, since colored strings are used, the following effects can be obtained.
（１１スペーサ内に着色紐を挿入することにより製造で
きるのでスペーサの押出成形装置は特殊なものである必
要がなく、経済的である。(11) Since the spacer can be manufactured by inserting a colored string into the spacer, there is no need for a special extrusion molding device for the spacer, which is economical.
（２１着着色紐抗張力体としての機能も具備させること
ができる。(21 Colored string can also function as a tensile strength body.
（３） 着色紐はスペーサ内部に挿入しであるので光
ファイバ心線は着色による影響を全く受けず安定し次伝
送特性が得られる。(3) Since the colored string is inserted inside the spacer, the optical fiber core is not affected by the coloring at all and stable transmission characteristics can be obtained.
第５図〜＃！９図には着色顔料を用いて着色部４を設け
た例を示す。着色顔料はスペーサの羽根部、空洞部等の
外周部に着色部４ｔ−設ける場合に好ましく適用される
。着色部４の数は第５図のように１箇所でもよいし、第
６〜９図のように２箇所あるいはそれ以上でもよく、場
所も羽根部、空洞部のいずれでもよい。１箇所の場合、
第５図のように、例えば羽根部の、中央部を外してどち
らかの側に片よらせることが、また複数箇所の場合には
各々、赤と青のように色を変えることが、撚シ方向性、
基準心線の定め方において、より有効である。第６図は
隣接する空洞部に着色顔料を含有させた例、第７図は隣
接する羽根部に着色顔料全含有させた列、第８図は隣接
する空洞部と羽根部に着色顔料を含有させた例であるが
、心線が識別できる限り、隣接部分だけでなくどのよう
な場所に着色部を設けてもよい。また、第９図は羽根部
の外周部で、円弧の中央部を外し次両側に２色の着色を
施した例である。Figure 5~#! FIG. 9 shows an example in which the colored portion 4 is provided using a colored pigment. The colored pigment is preferably applied when the colored portion 4t is provided on the outer periphery of the spacer wing portion, cavity portion, etc. The number of colored portions 4 may be one as shown in FIG. 5, two or more as shown in FIGS. 6 to 9, and the colored portions 4 may be located either in the wing portion or in the cavity. In the case of one location,
As shown in Figure 5, for example, it is possible to remove the center part of the blade part and make it lean to either side, or if there are multiple parts, to change the color of each part, such as red and blue. directionality,
This method is more effective in determining the reference core wire. Figure 6 is an example in which colored pigments are contained in adjacent cavities, Figure 7 is a row in which colored pigments are fully contained in adjacent blade parts, and Figure 8 is an example in which colored pigments are contained in adjacent cavity parts and blade parts. However, as long as the core wires can be identified, the colored portions may be provided not only in adjacent portions but also in any location. Moreover, FIG. 9 shows an example in which the center part of the circular arc is removed from the outer peripheral part of the blade part, and then both sides are colored in two colors.
スペーサの外周部に着色するにはスペーサ本体と異なる
色の着色顔料をスペーサ本体と一緒に押出成形一体化す
る方法で簡単に製造できる。Coloring the outer periphery of the spacer can be easily produced by integrally extruding a coloring pigment of a color different from that of the spacer body together with the spacer body.
この例ではスペーサ本体と異色の材料と’ｔ −緒に押
出成形一体化させて着色しているので、着色が完全であ
り、経時的に脱色するなどの心配がないし、光ファイバ
心線に着色する場合に比べて顔料の種類、材質などの制
約がなく安価である。In this example, the spacer body and a different color material are extruded and colored together, so the coloring is complete and there is no need to worry about the color fading over time, and the optical fiber core is colored. There are no restrictions on the type of pigment, material, etc., and the cost is lower than in the case of using pigments.
第１０図はスペーサ内に１スペーサの空洞部と同一数の
放射状開口部を有する補強部材５を設け、この開口部の
一箇所あるいはそれ以上を着色したものである。複数箇
所の場合には心線識別の丸めに各々の色を異なった色に
する必要がある。また複数箇所の場合、図のような隣接
部だけでなく、心線が識別できる限り、どのような場所
でもよい。In FIG. 10, a reinforcing member 5 having the same number of radial openings as the cavities of one spacer is provided in the spacer, and one or more of these openings are colored. In the case of multiple locations, it is necessary to use a different color for each rounding for core wire identification. In the case of multiple locations, not only adjacent locations as shown in the figure, but any location as long as the core wire can be identified may be used.
この構造のスペーサはスペーサ本体の押出成形時に放射
状開口部の一定の場所に、着色された補強部材を挿入す
ることによって容易に製造できる。スペーサの空洞部は
一般にケーブルに可撓性をもたせるために長さ方向に一
定ピッチで回転した構造になる。したがって、挿入され
る補強部材も空洞部の回転と同一ピンチで回転しなから
押出装置に供給する必要がある。また放射状補強部材は
図のように、その開口部がスペーサの空洞部と、半径方
向突出部がスペーサ本体の突出部の中心に位置するよう
に配置した方が好ましい。A spacer having this structure can be easily manufactured by inserting a colored reinforcing member into a predetermined position of the radial opening during extrusion molding of the spacer body. Generally, the cavity of the spacer has a structure in which it is rotated at a constant pitch in the length direction in order to impart flexibility to the cable. Therefore, the reinforcing member to be inserted must also be rotated with the same pinch as the rotation of the cavity before being fed to the extrusion device. Further, as shown in the figure, it is preferable that the radial reinforcing member be arranged so that its opening is located at the center of the cavity of the spacer and its radial protrusion is located at the center of the protrusion of the spacer body.
この例の場合には特に次のような効果が奏せられる。In this example, the following effects are particularly achieved.
（１） スペーサの中心に補強部材を挿入するだけで製
造できるので、通常の押出装置で製造でき、経済的効果
大である。(1) Since the spacer can be manufactured by simply inserting the reinforcing member into the center of the spacer, it can be manufactured using a normal extrusion device, and is highly economical.
（２） 中心の補強体は着色による７アイパ識別機能
と外力に対するスペーサの補強機能を具備する。特に第
１０図のような配置においては、ケーブルに加わる張力
と圧縮力の両方に対して光ファイバ心線を保護する機能
が増大する。(2) The central reinforcing body has a coloring function to identify the 7-aipa and a function to reinforce the spacer against external forces. In particular, the arrangement shown in FIG. 10 increases the ability to protect the optical fiber against both tension and compression forces applied to the cable.
本発明のスペーサ形光ファイバケーブルの製造方法は、
心線被榎によらず、簡単な押出成形装置を用いて着色材
料をスペーサ本体と一緒に押出成形一体化することによ
るので、ケーブル製造効率が改善され、着色が完全であ
り、着色材質の制約も少なく経済的である。さらに本発
明によるファイバ心線は光伝送特性が安定し、補強機能
が増大するという利点もある。The method for manufacturing a spacer type optical fiber cable of the present invention includes:
By extruding the coloring material together with the spacer body using a simple extrusion molding device, the cable manufacturing efficiency is improved, the coloring is complete, and there are no restrictions on the coloring material, regardless of the core wire thickness. It is also less economical. Furthermore, the fiber core according to the present invention has the advantage of stable optical transmission characteristics and increased reinforcing function.
第１図〜第１０図は本発明の実施態様による着色部のあ
るスペーサ形光ファイバケーブルの断面図であり、第１
１図は従来のスペーサ形多心光ファイバケーブルの断面
図である。図中、１がスペーサ、２がスペーサ空洞部、
３が心線、４が着色部、５が補強部材である。FIGS. 1 to 10 are cross-sectional views of a spacer-type optical fiber cable with a colored portion according to an embodiment of the present invention.
FIG. 1 is a sectional view of a conventional spacer type multi-core optical fiber cable. In the figure, 1 is a spacer, 2 is a spacer cavity,
3 is a core wire, 4 is a colored portion, and 5 is a reinforcing member.
Claims (4)
た空洞部を設けたスペーサの空洞内に光ファイバ心線を
収納した構造の光ファイバケーブルにおいて、スペーサ
本体と異なる色の材料をスペーサ本体と一緒に押出成型
し一体化することによりスペーサに着色することを特徴
とするスペーサ形光ファイバケーブルの製造方法。(1) In an optical fiber cable having a structure in which an optical fiber core is housed in the cavity of a spacer in which a plurality of cavities opening to the outside are provided on the outer periphery of a plastic linear body, a material of a color different from that of the spacer body is used for the spacer body. A method for manufacturing a spacer-type optical fiber cable, characterized in that the spacer is colored by extrusion molding and integrating the spacer with the spacer.
とを特徴とする特許請求の範囲第（１）項記載のスペー
サ形光ファイバケーブルの製造方法。(2) The method for manufacturing a spacer-type optical fiber cable according to claim (1), wherein the material having a color different from that of the spacer body is a colored string.
、スペーサの外周部に着色部を設けることを特徴とする
特許請求の範囲第（１）項記載のスペーサ形光ファイバ
ケーブルの製造方法。(3) The method for manufacturing a spacer-type optical fiber cable according to claim (1), wherein the material having a different color from the spacer body is a colored pigment, and a colored portion is provided on the outer periphery of the spacer.
と同一数の放射状開口部を有する補強部材であり、その
開口部の一部がスペーサ本体と異なる色であり、かつ該
補強部材をスペーサ内部に設けることを特徴とする特許
請求の範囲第（１）項記載のスペーサ形光ファイバケー
ブルの製造方法。(4) The reinforcing member is made of a material of a different color from the spacer body and has the same number of radial openings as the cavities of the spacer, and some of the openings are of a different color from the spacer body, and the reinforcing member is placed inside the spacer. A method for manufacturing a spacer-type optical fiber cable according to claim (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63039607A JPS63253316A (en) | 1988-02-24 | 1988-02-24 | Production of spacer-type optical fiber cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63039607A JPS63253316A (en) | 1988-02-24 | 1988-02-24 | Production of spacer-type optical fiber cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63253316A true JPS63253316A (en) | 1988-10-20 |
| JPH0529883B2 JPH0529883B2 (en) | 1993-05-06 |
Family
ID=12557800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63039607A Granted JPS63253316A (en) | 1988-02-24 | 1988-02-24 | Production of spacer-type optical fiber cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63253316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0327010A (en) * | 1989-06-23 | 1991-02-05 | Fujikura Ltd | Slot type optical cable |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS521140U (en) * | 1975-06-23 | 1977-01-06 | ||
| JPS5263350A (en) * | 1975-09-19 | 1977-05-25 | Cables De Lyon Geoffroy Delore | Optical fiber |
| FR2515411A1 (en) * | 1981-10-28 | 1983-04-29 | Telecommunications Sa | METHOD AND DEVICE FOR MANUFACTURING A HELICOIDAL GROOVE JONC FOR OPTICAL FIBER CABLE AND THE JONC OBTAINED BY THE PROCESS |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS521140B2 (en) * | 1974-06-12 | 1977-01-12 |
-
1988
- 1988-02-24 JP JP63039607A patent/JPS63253316A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS521140U (en) * | 1975-06-23 | 1977-01-06 | ||
| JPS5263350A (en) * | 1975-09-19 | 1977-05-25 | Cables De Lyon Geoffroy Delore | Optical fiber |
| FR2515411A1 (en) * | 1981-10-28 | 1983-04-29 | Telecommunications Sa | METHOD AND DEVICE FOR MANUFACTURING A HELICOIDAL GROOVE JONC FOR OPTICAL FIBER CABLE AND THE JONC OBTAINED BY THE PROCESS |
| JPS58134607A (en) * | 1981-10-28 | 1983-08-10 | ソシエテ・アノニム・デ・テレコミユニカシイオンズ | Cylindrical core with circumferentially helical groove and apparatus for manufacturing same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0327010A (en) * | 1989-06-23 | 1991-02-05 | Fujikura Ltd | Slot type optical cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0529883B2 (en) | 1993-05-06 |
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