JP2003002698A - Resin coating apparatus for optical fiber - Google Patents
Resin coating apparatus for optical fiberInfo
- Publication number
- JP2003002698A JP2003002698A JP2001182807A JP2001182807A JP2003002698A JP 2003002698 A JP2003002698 A JP 2003002698A JP 2001182807 A JP2001182807 A JP 2001182807A JP 2001182807 A JP2001182807 A JP 2001182807A JP 2003002698 A JP2003002698 A JP 2003002698A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- nipple
- resin
- hole
- coating
- 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
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、線引された光ファ
イバに保護被覆を施すための樹脂被覆装置に関するもの
である。
【０００２】
【従来の技術】図３は、従来の光ファイバ用樹脂被覆装
置の一例を示す概略図である。図３の光ファイバ用樹脂
被覆装置では、ニップル１と被覆ダイ２とが組み合わさ
れて組み合わせ体３が形成されている。ニップル１と被
覆ダイ２との隙間には樹脂供給流路４が設けられてい
る。組み合わせ体３内の同心上にニップル１のニップル
孔５と被覆ダイ２のダイ孔６が設けられている。ニップ
ル孔５は、テーパ孔部５ａとランド部５ｂとで構成され
ている。ダイ孔６は、テーパ孔部６ａとランド部６ｂと
で構成されている。また、組み合わせ体３内には、ニッ
プル孔５およびダイ孔６と同心上に環状の樹脂溜め室７
が設けられている。樹脂溜め室７には、樹脂供給口８よ
り樹脂９が供給されるようになっている。
【０００３】ニップル孔５とダイ孔６には光ファイバ１
０が通され、該光ファイバ１０には樹脂溜め室７より樹
脂供給流路４を経てダイ孔６に加圧供給される樹脂９が
被覆され、次工程の図示しない被覆硬化装置を経由して
光ファイバ心線１１が製造される。この際に、ニップル
孔５の出口には樹脂９と雰囲気との境界面となるメニス
カス１２が形成され、被覆ダイ２のテーパ孔部６ａ内に
は樹脂９の循環流１３が形成される。
【０００４】
【発明が解決しようとする課題】しかし、図３の光ファ
イバ用樹脂被覆装置は、光ファイバ１０の線速が高線速
になると均一に樹脂９が被覆できなくなる現象、いわゆ
る偏肉が発生したり、光ファイバ心線１１の外径が変動
して安定した被覆ができなくなるという問題が発生して
いた。その原因は、ダイ孔６のテーパ孔部６ａ内に発生
した樹脂９の循環流１３の乱れとメニスカス１２の乱れ
が原因であると考えられている。また、循環流１３が乱
れることによる悪影響として、ニップル孔５の入口側に
樹脂が溢れることが考えられるが、溢れた樹脂が固化し
て、ニップル孔５に入ってくる光ファイバ１０を傷つ
け、断線を招くこともある。
【０００５】さらに、図３の光ファイバ用樹脂被覆装置
は、ニップル孔５の形状が入口側にテーパ状に広がるテ
ーパ孔部５ａを含むことから、光ファイバ１０の線速が
高線速になるほど、光ファイバ１０周辺の雰囲気が光フ
ァイバ１０に引かれて樹脂９に入りやすくなり、その結
果光ファイバ１０の被覆に気泡が発生するという問題が
あった。なお、光ファイバ１０に随伴された光ファイバ
１０周辺の雰囲気はニップル孔５のテーパ孔部５ａに入
りやすいため、雰囲気の流れそのものがメニスカス１２
に乱れをもたらす原因にもなっていると考えられる。
【０００６】上記問題を解決するためには、光ファイバ
１０周辺の雰囲気が樹脂９に入りにくくなるように光フ
ァイバ用樹脂被覆装置の構造を見直さなければならな
い。
【０００７】そこで、図３の光ファイバ用樹脂被覆装置
とは異なるニップル構造を有する光ファイバ用樹脂被覆
装置が特開平７−１３３１４０号に開示されている。こ
の光ファイバ用樹脂被覆装置は、図４に示すように、ニ
ップル２３のニップル孔２６の周端部に光ファイバ１０
の進行方向と逆向きに設けられた円筒状の突状部２９を
有する。
【０００８】しかしながら、この突状部２９を有するニ
ップル孔２６は、その入口の光ファイバ１０の進行方向
の断面形状が方形となっているので、光ファイバ１０の
線速が高線速になるほど、光ファイバ１０の周辺の雰囲
気の流れがニップル孔２６入口付近で乱れるため、上記
問題点を解決することはできなかった。なお、図４にお
いて、２２はダイス、２４は入口、２５は出口、２７は
樹脂貯留部、２８はニップル２３を回転させて、ニップ
ル２３をダイス２２に対し、上下方向に移動させる駆動
装置である。
【０００９】
【課題を解決するための手段】本発明は上記問題点を解
決すべくなされたもので、光ファイバを挿通するニップ
ル孔を設けたニップルと被覆ダイを有する光ファイバ用
樹脂被覆装置において、前記ニップルは光ファイバの進
行方向と逆方向に円錐台状部を有し、前記ニップル孔は
前記円錐台状部の中心にその軸方向に貫通孔を設けてな
ることを特徴とするものである。
【００１０】本発明によれば、ニップル孔は円錐台状部
の中心にその軸方向に設けられているので、ニップル孔
の光ファイバ入口近傍にはテーパをなす外周面が形成さ
れている。そのため、高線速の光ファイバに引かれた光
ファイバ周辺の雰囲気は、ニップル孔入口近傍でその外
周面に沿って外側に流れやすくなり、ニップル孔に入り
にくくなる。したがって、樹脂と雰囲気との境界面とな
るメニスカスの乱れと被覆ダイ内の樹脂の循環流の乱れ
を抑えることができるので、樹脂被覆の偏肉、外径変動
を抑え、気泡の発生を防ぐことができる。
【００１１】
【発明の実施の形態】本発明の実施の形態を図面を用い
て説明する。図１は、本発明に係る光ファイバ用樹脂被
覆装置の一実施形態の縦断面図である。なお、図１にお
いて、図３に関して説明した部分と同部分は同符号で指
示し、詳細な説明は省略する。
【００１２】本実施形態が従来例と異なる特徴的なこと
は、図１に示すように、ニップル１が光ファイバ１０の
進行方向と逆方向に凸状に設けられた円錐台状部１４を
有し、ニップル孔５は円錐台状部１４の中心にその軸方
向に貫通孔を設けて形成されていることである。なお、
円錐台状部１４のニップル孔５付近は、進入する光ファ
イバ１０が傷つかない程度の曲面をなしており、この曲
面は例えば、ニップル孔５方向の断面形状がニップル孔
５の径と比較して十分小さい曲率半径を有する曲線から
なるような曲面となっている。
【００１３】ここで、実施例として、図１の光ファイバ
用樹脂被覆装置を用いて直径約１２５μｍの光ファイバ
１０に線速１０００〜２０００ｍ／分でウレタンアクリ
レート系樹脂９を２層にわたって被覆して直径約２４５
μｍの光ファイバ心線１１を製作した。また、従来例と
して図３に示す構造の光ファイバ用樹脂被覆装置を用い
て上記光ファイバ心線１１を作製した。
【００１４】なお、このときの樹脂の粘度は２Ｐａ・ｓ
以下、供給圧力は０．４ＭＰａ程度で、従来例の光ファ
イバ用樹脂被覆装置を使用した場合に線速１０００ｍ／
分の条件で樹脂被覆が可能な値とした。
【００１５】図２（ａ）、（ｂ）はそれぞれ、二次被覆
形成に用いた実施例および従来例の各部の寸法、角度を
示す説明図であり、表１はこれら各部の寸法（ｍｍ）、
角度（度）の数値を示すものである。
【００１６】
【表１】
【００１７】なお、円錐台状部１４の寸法は表１の値に
限られることはなく、円錐台状部１４が形成する外周面
と光ファイバの進行方向とのなす角度が、１０°以上８
０°以下の範囲であれば効果を得ることが可能である。
また、円錐台状部１４が光ファイバ進行方向と逆向きに
突出している長さ（Ｌ2 ）は、ニップル孔５の内径以上
あれば効果を得ることが可能であり、その最適値は線速
などの条件により決定される。
【００１８】表２に二次被覆形成時の実験結果を示す。
表２において、偏肉については偏心量５μｍ以下を○と
し、外径変動については設定値に対して±１μｍ以内を
○とし、被覆内の気泡については気泡の確認できないも
のを○とし、断線については被覆不良による断線が起こ
らないものを○とした。
【００１９】
【表２】
【００２０】この実験結果から、ニップル孔５をほぼ中
心とする円錐台状部１４が光ファイバ１０の進行方向と
逆向きに設けられている本実施例の被覆装置は、線速１
２００ｍ／分の光ファイバ１０に対して良好な被覆を行
うことができた。
【００２１】一方、従来例の被覆装置は線速１２００ｍ
／分の条件で被覆を行った際に、被覆の偏肉が大きく、
ニップル孔５の入口側に樹脂が溢れて固化し、ニップル
孔５に入ってくる光ファイバ１０を傷つけることによる
断線が発生し、さらに二次被覆内に気泡が多数確認され
た。
【００２２】また、上記の傾向は、外径約１６０〜１９
０μｍの一次被覆を形成する際に一次被覆形成のために
最適化された本実施例および従来例の被覆装置について
もほぼ同様であった。
【００２３】なお、本実施形態において、ニップル孔５
を有するニップル１と、ダイ孔６を有する被覆ダイ２と
から構成された光ファイバ用樹脂被覆装置について説明
したが、ニップルと被覆ダイとの間に中間ダイを有する
光ファイバ用樹脂被覆装置（特開平１１−６０２８８号
公報参照）などに適用してもよいことはいうまでもな
い。
【００２４】
【発明の効果】以上説明したように本発明によれば、光
ファイバを挿通するニップル孔を設けたニップルと被覆
ダイを有する光ファイバ用樹脂被覆装置において、前記
ニップルは光ファイバの進行方向と逆方向に円錐台状部
を有し、前記ニップル孔は前記円錐台状部の中心にその
軸方向に貫通孔を設けてなるため、光ファイバに均一に
樹脂を被覆し、かつ被覆中の気泡の発生を少なくするこ
とができるという優れた効果がある。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin coating apparatus for applying a protective coating to a drawn optical fiber. 2. Description of the Related Art FIG. 3 is a schematic view showing an example of a conventional resin coating apparatus for optical fibers. In the optical fiber resin coating apparatus shown in FIG. 3, a nipple 1 and a coating die 2 are combined to form a combined body 3. A resin supply channel 4 is provided in a gap between the nipple 1 and the coating die 2. A nipple hole 5 of the nipple 1 and a die hole 6 of the coating die 2 are provided concentrically in the combination body 3. The nipple hole 5 includes a tapered hole 5a and a land 5b. The die hole 6 includes a tapered hole 6a and a land 6b. In the combination body 3, an annular resin storage chamber 7 is provided concentrically with the nipple hole 5 and the die hole 6.
Is provided. The resin reservoir 9 is supplied with a resin 9 from a resin supply port 8. The optical fiber 1 is inserted into the nipple hole 5 and the die hole 6.
The optical fiber 10 is coated with a resin 9 which is supplied from the resin storage chamber 7 through the resin supply flow path 4 to the die hole 6 under pressure, and is passed through a coating curing device (not shown) in the next step. The optical fiber core 11 is manufactured. At this time, a meniscus 12 serving as a boundary surface between the resin 9 and the atmosphere is formed at the outlet of the nipple hole 5, and a circulating flow 13 of the resin 9 is formed in the tapered hole 6 a of the coating die 2. However, the optical fiber resin coating apparatus shown in FIG. 3 cannot uniformly coat the resin 9 when the linear speed of the optical fiber 10 becomes high, that is, so-called uneven thickness. And the outer diameter of the optical fiber core wire 11 fluctuates, so that stable coating cannot be performed. It is considered that the cause is that the turbulence of the circulation flow 13 of the resin 9 and the turbulence of the meniscus 12 generated in the tapered hole portion 6a of the die hole 6. In addition, as an adverse effect of the turbulence of the circulating flow 13, it is conceivable that the resin overflows on the inlet side of the nipple hole 5. May be invited. Further, in the optical fiber resin coating apparatus shown in FIG. 3, since the shape of the nipple hole 5 includes a tapered hole portion 5a which expands in a tapered shape on the inlet side, the higher the linear velocity of the optical fiber 10, the higher the linear velocity. In addition, there is a problem that the atmosphere around the optical fiber 10 is attracted to the optical fiber 10 and easily enters the resin 9, and as a result, bubbles are generated in the coating of the optical fiber 10. Since the atmosphere around the optical fiber 10 accompanying the optical fiber 10 easily enters the tapered hole portion 5a of the nipple hole 5, the flow of the atmosphere itself is
It is also considered to be a cause of disturbance. In order to solve the above problem, the structure of the optical fiber resin coating device must be reviewed so that the atmosphere around the optical fiber 10 does not easily enter the resin 9. Therefore, an optical fiber resin coating apparatus having a nipple structure different from that of the optical fiber resin coating apparatus shown in FIG. 3 is disclosed in JP-A-7-133140. As shown in FIG. 4, the resin coating device for an optical fiber includes an optical fiber 10 at a peripheral end of a nipple hole 26 of a nipple 23.
Has a cylindrical protruding portion 29 provided in a direction opposite to the traveling direction. However, since the nipple hole 26 having the projecting portion 29 has a rectangular cross section in the traveling direction of the optical fiber 10 at the entrance, as the linear velocity of the optical fiber 10 increases, the linear velocity becomes higher. Since the flow of the atmosphere around the optical fiber 10 was disturbed near the entrance of the nipple hole 26, the above problem could not be solved. In FIG. 4, reference numeral 22 denotes a die, 24 denotes an inlet, 25 denotes an outlet, 27 denotes a resin storage unit, and 28 denotes a driving device that rotates the nipple 23 and moves the nipple 23 relative to the die 22 in the vertical direction. . SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and there is provided a resin coating apparatus for an optical fiber having a nipple provided with a nipple hole through which an optical fiber is inserted and a coating die. The nipple has a truncated conical portion in a direction opposite to the traveling direction of the optical fiber, and the nipple hole is formed by providing a through hole in the center of the truncated conical portion in the axial direction thereof. is there. According to the present invention, since the nipple hole is provided at the center of the truncated conical portion in the axial direction, a tapered outer peripheral surface is formed near the optical fiber entrance of the nipple hole. Therefore, the atmosphere around the optical fiber drawn by the high linear velocity optical fiber is likely to flow outward along the outer peripheral surface near the nipple hole entrance, and is less likely to enter the nipple hole. Therefore, it is possible to suppress the disturbance of the meniscus and the disturbance of the circulating flow of the resin in the coating die, which is a boundary surface between the resin and the atmosphere. Can be. Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of an embodiment of an optical fiber resin coating apparatus according to the present invention. In FIG. 1, the same parts as those described with reference to FIG. 3 are designated by the same reference numerals, and detailed description will be omitted. The present embodiment is characterized in that it differs from the conventional example in that, as shown in FIG. 1, the nipple 1 has a truncated conical portion 14 in which the nipple 1 is provided in a convex shape in a direction opposite to the traveling direction of the optical fiber 10. The nipple hole 5 is formed by providing a through hole in the center of the truncated conical portion 14 in the axial direction thereof. In addition,
The vicinity of the nipple hole 5 of the truncated conical portion 14 has a curved surface such that the entering optical fiber 10 is not damaged. For example, this curved surface has a cross-sectional shape in the direction of the nipple hole 5 that is smaller than the diameter of the nipple hole 5. The curved surface has a sufficiently small radius of curvature. Here, as an embodiment, an urethane acrylate resin 9 is coated in two layers at a linear velocity of 1000 to 2000 m / min on an optical fiber 10 having a diameter of about 125 μm using the optical fiber resin coating apparatus of FIG. About 245 in diameter
A μm optical fiber core 11 was manufactured. Further, as a conventional example, the above optical fiber core wire 11 was manufactured using an optical fiber resin coating device having a structure shown in FIG. The viscosity of the resin at this time is 2 Pa · s
Hereinafter, the supply pressure is about 0.4 MPa, and a linear velocity of 1000 m /
The value was such that resin coating was possible under the conditions of minutes. FIGS. 2 (a) and 2 (b) are explanatory views showing dimensions and angles of respective parts of the embodiment and the conventional example used for forming the secondary coating. Table 1 shows dimensions (mm) of these parts. ,
It shows the numerical value of the angle (degree). [Table 1] The dimensions of the truncated cone 14 are not limited to the values shown in Table 1, and the angle between the outer peripheral surface formed by the truncated cone 14 and the direction in which the optical fiber travels is 10 ° or more.
An effect can be obtained within the range of 0 ° or less.
The length (L 2 ) of the frusto-conical portion 14 projecting in the direction opposite to the direction of travel of the optical fiber can be effective if the length is longer than the inner diameter of the nipple hole 5. It is determined by such conditions. Table 2 shows the experimental results when forming the secondary coating.
In Table 2, for uneven thickness, eccentricity of 5 μm or less was marked as ○, outer diameter variation was set to を 1 μm or less with respect to the set value, bubbles in the coating were marked as ○ when bubbles could not be confirmed, and disconnection was noted. Indicates that no disconnection due to poor coating occurred. [Table 2] According to the experimental results, the coating apparatus of this embodiment in which the truncated conical portion 14 having the nipple hole 5 substantially at the center is provided in the direction opposite to the traveling direction of the optical fiber 10 has a
Good coating could be performed on the optical fiber 10 at 200 m / min. On the other hand, the conventional coating apparatus has a linear speed of 1200 m.
/ When coating is performed under the condition of / minute, the uneven thickness of the coating is large,
The resin overflowed to the inlet side of the nipple hole 5 and solidified, the wire was broken by damaging the optical fiber 10 entering the nipple hole 5, and many bubbles were confirmed in the secondary coating. Further, the above tendency is caused by the fact that the outer diameter is about 160-19.
The same applies to the coating apparatus of the present embodiment and the conventional example which are optimized for forming the primary coating when forming the primary coating of 0 μm. In this embodiment, the nipple hole 5
The resin coating apparatus for optical fibers, which is composed of the nipple 1 having the die and the coating die 2 having the die hole 6, has been described. However, the resin coating apparatus for the optical fiber having the intermediate die between the nipple and the coating die (see FIG. It goes without saying that the present invention may be applied to, for example, Japanese Unexamined Patent Publication No. Hei 11-60288). As described above, according to the present invention, in an optical fiber resin coating apparatus having a nipple provided with a nipple hole through which an optical fiber is inserted and a coating die, the nipple is an optical fiber Since the nipple hole has a through-hole in the axial direction at the center of the truncated cone, the resin is uniformly coated on the optical fiber, and There is an excellent effect that generation of air bubbles can be reduced.
【図面の簡単な説明】
【図１】本発明に係る光ファイバ用樹脂被覆装置の一実
施形態の縦断面図である。
【図２】（ａ）、（ｂ）はそれぞれ、二次被覆形成に用
いた実施例および従来例の各部の寸法、角度を示す説明
図である。
【図３】光ファイバ用樹脂被覆装置の一従来例の縦断面
図である。
【図４】光ファイバ用樹脂被覆装置の他の従来例の縦断
面図である。
【符号の説明】
１ ニップル
２ 被覆ダイ
３ 組み合わせ体
４ 樹脂供給流路
５ ニップル孔
６ ダイ孔
６ａ テーパ孔部
６ｂ ランド部
７ 樹脂溜め室
８ 樹脂供給口
９ 樹脂
１０ 光ファイバ
１１ 光ファイバ心線
１２ メニスカス
１３ 循環流
１４ 円錐台状部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of an embodiment of an optical fiber resin coating apparatus according to the present invention. FIGS. 2 (a) and 2 (b) are explanatory views showing dimensions and angles of respective portions of an embodiment and a conventional example used for forming a secondary coating, respectively. FIG. 3 is a longitudinal sectional view of a conventional example of an optical fiber resin coating device. FIG. 4 is a longitudinal sectional view of another conventional example of an optical fiber resin coating device. [Description of Signs] 1 Nipple 2 Coating die 3 Combination body 4 Resin supply flow path 5 Nipple hole 6 Die hole 6a Tapered hole 6b Land 7 Resin reservoir 8 Resin supply port 9 Resin 10 Optical fiber 11 Optical fiber core 12 Meniscus 13 Circulation flow 14 Frustoconical part
Claims (1)
たニップルと被覆ダイを有する光ファイバ用樹脂被覆装
置において、前記ニップルは光ファイバの進行方向と逆
方向に円錐台状部を有し、前記ニップル孔は前記円錐台
状部の中心にその軸方向に貫通孔を設けてなることを特
徴とする光ファイバ樹脂被覆装置。Claims: 1. An optical fiber resin coating apparatus having a nipple having a nipple hole through which an optical fiber is inserted and a coating die, wherein the nipple has a truncated cone shape in a direction opposite to a traveling direction of the optical fiber. An optical fiber resin coating device, comprising: a nipple hole provided at a center of the truncated conical portion in an axial direction thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001182807A JP4652616B2 (en) | 2001-06-18 | 2001-06-18 | Optical fiber resin coating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001182807A JP4652616B2 (en) | 2001-06-18 | 2001-06-18 | Optical fiber resin coating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003002698A true JP2003002698A (en) | 2003-01-08 |
| JP4652616B2 JP4652616B2 (en) | 2011-03-16 |
Family
ID=19022831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001182807A Expired - Fee Related JP4652616B2 (en) | 2001-06-18 | 2001-06-18 | Optical fiber resin coating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4652616B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014196612A1 (en) * | 2013-06-07 | 2014-12-11 | 株式会社フジクラ | Optical-fiber-bare-wire-covering device and optical-fiber-bare-wire-covering method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60251156A (en) * | 1984-05-29 | 1985-12-11 | Sumitomo Electric Ind Ltd | Resin cladding method of optical fiber |
| JPH07133140A (en) * | 1993-11-04 | 1995-05-23 | Fujikura Ltd | Resin coating device for optical fiber and its production |
-
2001
- 2001-06-18 JP JP2001182807A patent/JP4652616B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60251156A (en) * | 1984-05-29 | 1985-12-11 | Sumitomo Electric Ind Ltd | Resin cladding method of optical fiber |
| JPH07133140A (en) * | 1993-11-04 | 1995-05-23 | Fujikura Ltd | Resin coating device for optical fiber and its production |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014196612A1 (en) * | 2013-06-07 | 2014-12-11 | 株式会社フジクラ | Optical-fiber-bare-wire-covering device and optical-fiber-bare-wire-covering method |
| CN105263879A (en) * | 2013-06-07 | 2016-01-20 | 株式会社藤仓 | Optical-fiber-bare-wire-covering device and optical-fiber-bare-wire-covering method |
| JP5951129B2 (en) * | 2013-06-07 | 2016-07-13 | 株式会社フジクラ | Optical fiber bare wire coating apparatus and optical fiber bare wire coating method |
| US10562814B2 (en) | 2013-06-07 | 2020-02-18 | Fujikura Ltd. | Bare optical fiber coating device and bare optical fiber coating method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4652616B2 (en) | 2011-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1218812A (en) | Multiple coating of fibers | |
| EP3074803B1 (en) | Apparatus and method for applications of optical fiber coatings | |
| US20090241603A1 (en) | Optical fiber manufacturing methods | |
| US4480898A (en) | Fibers with multiple coatings | |
| JP2002274894A (en) | Resin coating device for optical fiber | |
| JP5123798B2 (en) | Wire surface treatment equipment | |
| JPH0791092B2 (en) | Resin coating equipment for optical fiber | |
| JP2003002698A (en) | Resin coating apparatus for optical fiber | |
| JP3238105B2 (en) | Optical fiber resin coating method and optical fiber resin coating apparatus | |
| JP3557613B2 (en) | Optical fiber coating method and coating apparatus | |
| US6991679B2 (en) | Multiple feed applicator assembly for coating optical fibers | |
| US11440839B2 (en) | Optical fiber coating die with reduced wetted length | |
| US6030664A (en) | Biconic coating die for making coated optical fibers | |
| JP2024044752A (en) | Resin Coating Equipment | |
| JP2004264848A (en) | Coated optical fiber and manufacturing method therefor | |
| JPH0692693A (en) | Method for coating optical fiber with resin | |
| JP2023113107A (en) | Manufacturing method and manufacturing device of optical fiber cable | |
| JPS6065748A (en) | High-pressure coating apparatus | |
| JP2005338302A (en) | Resin coating apparatus for optical fiber | |
| WO2017168938A1 (en) | Lens device and method for manufacturing lens device | |
| JPS62297243A (en) | Resin coating method for optical fiber and apparatus therefor | |
| JPH03236928A (en) | Apparatus for coating running strand with resin | |
| JPH0122207B2 (en) | ||
| JPS6140850A (en) | Coating device for optical fiber | |
| JPH06107440A (en) | Device for coating wire with resin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080401 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20100524 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100528 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20100722 Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100722 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20100722 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20101124 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20101216 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 4652616 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131224 Year of fee payment: 3 |
|
| LAPS | Cancellation because of no payment of annual fees |