JPS6114149A - Stretching method of glass body - Google Patents
Stretching method of glass bodyInfo
- Publication number
- JPS6114149A JPS6114149A JP13465184A JP13465184A JPS6114149A JP S6114149 A JPS6114149 A JP S6114149A JP 13465184 A JP13465184 A JP 13465184A JP 13465184 A JP13465184 A JP 13465184A JP S6114149 A JPS6114149 A JP S6114149A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- outer diameter
- stretching
- glass body
- rod
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01466—Means for changing or stabilising the diameter or form of tubes or rods
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
この発明は、例えは光７アイパ等のガラス体を加熱して
所定の外径に延伸するガラス体の延伸方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method of stretching a glass body, such as a Hikari 7 Eyeper, by heating it and stretching it to a predetermined outer diameter.
一般に、光７アイパの製造においては、先ず外径が数１
０．０元ファイバ母材をＷＡＤ法等によって製造し、次
いでこの母材を加熱して延伸させ、この母材の略１１５
程度の外径とされたロッドを製造する。次にこのロッド
を加熱、線引きして所要の直径の光ファイバを製造して
いる。Generally, when manufacturing Hikari 7 Eyepa, first the outer diameter is
A 0.0 element fiber base material is manufactured by the WAD method, etc., and then this base material is heated and stretched to form approximately 115% of the base material.
Manufacture rods with an outer diameter of approximately This rod is then heated and drawn to produce an optical fiber of the desired diameter.
このうち上記母材を加熱し°て延伸させ、所定の外径と
されたロッドな製造するための従来の延伸方法では、先
ず棒状の母材をその両端部に設けられたダオー棒により
ガラス旋盤にその軸線廻りに回転自在に取り付ける。次
にこのガラス旋盤に取り付けられたこの母材を回転させ
ながら、バーナーでそつ外周部から加熱し、軟化させて
その軸線方向に引き伸ばす。そして上記バーナーをこの
母材の軸線方向に沿って移動させ、この母材の全長に亘
って加熱して引き伸ばすことにより所望の外径のロッド
を製造してい）。In the conventional stretching method, the base material is heated and stretched to produce a rod with a predetermined outer diameter. First, the rod-shaped base material is heated and stretched using a glass lathe using dowel rods installed at both ends of the rod. is attached so that it can rotate freely around its axis. Next, while rotating the base material attached to the glass lathe, it is heated from the outer periphery with a burner to soften it and stretch it in the axial direction. Then, the burner is moved along the axial direction of the base material to heat and stretch the base material over its entire length, thereby producing a rod with a desired outer diameter.)
しかしながらこのようなガラス体の延伸方法は、上述の
母材の加熱および引き伸し作業を人手に依 −つ
て行なっているため引き伸された母材の外径なＭ４繁に
ノギス等で測定しながら徐々に引き伸す必要があり、非
能率でおると共に、一様な外径のロッドを得ることが難
かしいという欠点があった。However, in this method of drawing a glass body, the above-mentioned heating and stretching of the base material is performed manually, so the outer diameter of the stretched base material (M4) is often measured with a caliper or the like. However, it is necessary to gradually stretch the rod, which is inefficient and has the disadvantage that it is difficult to obtain a rod with a uniform outer diameter.
この発明は上記事情に鑑みてなされたもので、ガラス体
の延伸作業において、一様な外径のガラス体を効率的か
つ自動的に製造することのできるガラス体の延伸方法を
提供することを目的とするものである。This invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for stretching a glass body that can efficiently and automatically produce a glass body having a uniform outer diameter in a glass body stretching operation. This is the purpose.
この発明のガラス体の延伸方法は、棒状のガラス体をそ
の両端部で支持し、加熱炉内にて加熱し軟化せしめたう
え引き伸してガラス体を延伸する際に、ガラス体が引き
伸され始める引き伸し位置に近い上記ガラス体の未延伸
部分の外径を測定し、この外径に基づいて上記ガラス体
の上記未延伸部分における引き伸し速度を算出し、上記
外径を測定した未延伸部分が上記引き伸し位置に来たと
きに上記算出した引き伸し速度で引き伸すようにし〔発
明の実施例〕
第１図ないし第３図は、この発明のガラス体の延伸方法
を元ファイバの製造における母材の延伸に適用した場合
の一火施例な示すもので、図中符号ｌが上記光ファイバ
の母材であり、符号２がとの母材ｌを延伸する延伸機で
おる。In the method for stretching a glass body of the present invention, a rod-shaped glass body is supported at both ends, heated in a heating furnace to soften it, and then stretched. Measure the outer diameter of the unstretched portion of the glass body near the stretching position where the stretching begins, calculate the stretching speed of the unstretched portion of the glass body based on this outer diameter, and measure the outer diameter. When the unstretched portion reaches the stretching position, it is stretched at the stretching speed calculated above. This is a one-fire example in which the method is applied to the drawing of a base material in the production of an original fiber, in which reference numeral l is the base material of the optical fiber, and reference numeral 2 is the drawing of the base material l. Use a stretching machine.
上記母材ｌはその直径が約５０．程度で長さが約２５０
１１程度とされた棒状のものであり、その両端部には、
それぞれその軸線方向を両側方へと所定長さ延出するよ
うにしてダミー棒１ａ、ｌａが設けられている。The diameter of the base material 1 is approximately 50mm. Approximately 250 mm long
It is a rod-shaped item with a size of about 11, and at both ends,
Dummy rods 1a and 1a are provided so that their respective axial directions extend a predetermined length to both sides.
他方この母材ｌを延伸する上記延伸機２は、図示されな
い本体フレームに、上レーＡ／３、下レール４、加熱炉
５および外径測定器６がそれぞれ設けられて構成された
ものである。On the other hand, the above-mentioned drawing machine 2 for drawing this base material 1 is constructed by installing an upper rail A/3, a lower rail 4, a heating furnace 5, and an outer diameter measuring device 6 on a main body frame (not shown). .
そして上記上レー／Ｉ／３はこの延伸機２の上部に所定
長さ垂直方向に立設されたもので、この上し
１−ル３には送り装置７が設けられている。この送
り装置７は、図示されない駆動装置により上記上レール
ａｒｋＪ上で上下方向に走行自在とされたもので、この
送り装ｒＩＬ７には上記母材ｌの一方のダミー棒１ａが
取り付けられる上部チャック７ａが設けられている。そ
してこの上レール３の下方に上記の下レール４が設けら
れている。The upper tray /I/3 is installed vertically for a predetermined length on the upper part of the stretching machine 2.
A feeding device 7 is provided in the 1-rule 3. This feeding device 7 is capable of moving vertically on the upper rail arkJ by a drive device (not shown), and the feeding device rIL7 has an upper chuck 7a to which one dummy rod 1a of the base material 1 is attached. is provided. The lower rail 4 is provided below the upper rail 3.
この下レール４は、この延伸機２の下部に上記上レール
３と同様に所定長式垂直方向に立設されたもので、この
下レール４上には引伸し装置８が設けられている。この
引伸し装置８は、上記送り装置７とは別の他の駆動装置
により上記下レール４面上で上下省内に走行自在とされ
たもので、この引伸し装［８には、上記母材ｌの他のダ
ミー棒ｔａが取り付けられる下部チャック８ａが設けら
れている。そしてこの下レール４と上記上レール３との
間に加熱炉５が設けられている。The lower rail 4 is vertically installed at a predetermined length in the same manner as the upper rail 3 at the lower part of the stretching machine 2, and an enlarging device 8 is provided on the lower rail 4. This enlarging device 8 is made to be able to move freely up and down on the surface of the lower rail 4 by a drive device different from the above-mentioned feeding device 7. A lower chuck 8a is provided to which another dummy rod ta is attached. A heating furnace 5 is provided between the lower rail 4 and the upper rail 3.
この加熱炉５はその内部に熱源としての誘導加熱炉等が
内蔵されたもので、その中央部は開口されて上記母材１
を加熱する加熱ｓ５ａとされている。そしてこれら加熱
炉５、上部チャック７ａおよび下部チャック８ａはそれ
ぞれ、これら上下部チャック７ａ、８．の中心線を結ん
だ垂線が、上記加熱炉５の軸線と一致するような配置と
されてめる。また、この加熱炉５の上方には、外径測定
器６が設けられている。This heating furnace 5 has an induction heating furnace or the like built therein as a heat source, and its central part is opened to allow the above-mentioned base material 1 to be heated.
Heating s5a is defined as heating s5a. The heating furnace 5, the upper chuck 7a and the lower chuck 8a are the upper and lower chucks 7a, 8. The arrangement is such that a perpendicular line connecting the center lines of the heating furnace 5 coincides with the axis of the heating furnace 5. Further, above the heating furnace 5, an outer diameter measuring device 6 is provided.
この外径測定器６は、上記母材ｌの外径を測定するため
のレーザ一式等の外径測定器であり、この延伸機２上で
、上記加熱炉５から上方へ予め設定された高さの位置に
固定されている。This outer diameter measuring device 6 is an outer diameter measuring device such as a set of lasers for measuring the outer diameter of the base material 1, and is used on the stretching machine 2 at a preset height upward from the heating furnace 5. Fixed in position.
このような構成の延伸機２で母材１を延伸するには、先
ず母材１のダミー棒１ａ、ｌａをそれぞれこの延伸機２
の上部チャック７ａおよび下部チャック８ａに取り付け
、この母材ｌをこの延伸機２に固定する。In order to stretch the base material 1 with the stretching machine 2 having such a configuration, first, the dummy bars 1a and la of the base material 1 are placed in the stretching machine 2.
to the upper chuck 7a and lower chuck 8a of the drawing machine 2, and fix the base material l to the drawing machine 2.
そして第１図に示すように、この母材ｌをこの延伸機２
上鄭から送り装置７および引伸し装置８を下方へと駆動
することにより、約１０６／ｓｒ程度のゆっくりした一
定の速度ｖ１で下降させながら、上記加熱炉５の加熱ｓ
Ｓａ内に挿入してゆく。Then, as shown in FIG.
By driving the feeding device 7 and the enlarging device 8 downward from the top, the heating s of the heating furnace 5 is lowered at a slow constant speed v1 of about 106/sr.
Insert it into Sa.
その加熱炉５の加熱ｉｓａ内では、その軸線方向の略中
央にてその加熱温度が最高の約 ２０００℃程度となる
。このため第２図に示すように、上記加熱ｓ５ａに挿入
した上記母材１は下降するに連れて加熱され、この加熱
部５ａの軸線方向略中央よりやや下方位置の図中Ｘ点に
おいて引き伸し可能な程度まで軟化される。そこで上記
の引伸し装に８を上記送り装ｒ！ｔ７の速度Ｖ、より速
か速度Ｖ、で下方に走行させてこの母材１を下方に引き
伸ばすと、この母材ｌは上記位置Ｘにおいて急激に引き
伸される。そこでこの位置Ｘは仁の母材ｌの引き伸し位
置とされ、この位置Ｘにおいて、この母材１は引き伸さ
れ縮径されたロッド９となる。In the heating isa of the heating furnace 5, the heating temperature reaches a maximum of about 2000° C. approximately at the center in the axial direction. Therefore, as shown in FIG. 2, the base material 1 inserted into the heating section 5a is heated as it descends, and is stretched at point softened to the extent possible. Therefore, 8 was added to the above-mentioned enlarger and the above-mentioned sending device r! When the base material 1 is stretched downward by traveling downward at the speed V at t7 or faster than the speed V at t7, the base material 1 is rapidly stretched at the position X mentioned above. Therefore, this position X is the stretching position of the base material 1, and at this position X, the base material 1 is stretched and becomes a rod 9 with a reduced diameter.
ここで上記母材ｌの外径なり、と口、製造すべき上記ロ
ッド９の外径なり、としたとき、速度Ｖ。Here, when the outer diameter of the base material 1 is the outer diameter of the die and the outer diameter of the rod 9 to be manufactured, the speed is V.
で下降するこの母材１を引き伸して外径り、のロッド９
を製造するための上記の引き伸ばし速度ｖ２は、
Ｄｌ 意
Ｖｖ＝（＝）ｘＶｌ ・・・・・・・・・・・・（１
）Ｄｌ
で得られる。Stretch this base material 1, which descends at
The above drawing speed v2 for manufacturing is Dl iVv=(=)xVl ・・・・・・・・・・・・(1
) Dl.
ところで、一般に上記母材ｌの外径り、はその軸線方向
に沿って一様ではないため、上記（１）式において引き
伸し、速度ｖ、Ｉ＊一定とならない。このため、この延
伸機２には上記のように、外径測定器６が設けられてい
る。この外径測定器６は第２図に示すように、上記の母
材ｌが引き伸し位置Ｘより所定の高さＬ上方に固定され
ており、上記母材ｌの外径Ｄ１を約１〜４１１程度の所
定間隔毎に計測する。そして、この延伸機２では、この
計測により得られた母材ｌの外径り、の値が図示されな
い制御部に入力され、この制御部において上記（１）式
により所要の引き伸し速度Ｖ、を算出したうえ、上記引
伸し装置８の速度を上記の算出した速度ｖ！に制御する
ようになっている。By the way, since the outer diameter of the base material l is generally not uniform along its axial direction, the stretching speed v and I* do not become constant in the above equation (1). For this reason, the stretching machine 2 is provided with the outer diameter measuring device 6 as described above. As shown in FIG. 2, this outer diameter measuring instrument 6 has the base material l fixed at a predetermined height L above the stretching position X, and the outer diameter D1 of the base material l is approximately 1 Measurement is performed at predetermined intervals of about 411. In this drawing machine 2, the value of the outer diameter of the base material l obtained by this measurement is input to a control section (not shown), and the control section determines the required drawing speed V according to the above equation (1). , and then set the speed of the enlarger 8 to the calculated speed v! It is designed to be controlled.
すなわち第２図において上記外径測定器６が、先ず速度
Ｖ、で下降する母材ｌの図中Ａ部の外径１・を計測する
・次に上記制御部に３″′てこの計 へ。That is, in Fig. 2, the outer diameter measuring device 6 first measures the outer diameter 1 of the part A in the figure of the base material l that is descending at a speed V.Next, the above-mentioned control section sends a 3'' lever to the gauge. .
測された母材ｌの外径り、から上記（１）式に基づいて
所要の引き伸し速度ＶＳを算出する。ここで上述のよう
に上記外径測定器６は母材１が引き伸し位置ｘより烏さ
Ｌ上方に位置しているため、上記母材１のＡ部は、時間
ＩＩ／ ｖ 、後に第３図に示す上記引き伸し位ｔＩＬ
ｘに致ることになる。したがって上記制御部は、外径測
定器６において計測した後時間ｔ ／ Ｖ 、経過後に
上記引伸し装置８を算出した上記速度Ｖ、とするように
設定されている。From the measured outer diameter of the base material l, the required stretching speed VS is calculated based on the above equation (1). Here, as mentioned above, since the outer diameter measuring device 6 is located above the length L of the base material 1 than the stretching position x, the A part of the base material 1 is The above enlarged position tIL shown in Figure 3
This will result in x. Therefore, the control section is set to set the enlarger 8 to the calculated speed V after the time t/V measured by the outer diameter measuring device 6 has elapsed.
したがってこのような延伸機２による延伸方法によれば
、予めその加熱炉５の上方でその軸線方向に沿って外径
の計測された母材１は、その計測された各部分が加熱機
５の加熱部５ａ内へと挿入されて、引き伸し位置Ｘにて
その各々の外径に対応した速度で引き伸されるため、ロ
ッド９の外径を自動的に一定のものとすることができる
。Therefore, according to the stretching method using such a stretching machine 2, the base material 1 whose outer diameter has been measured in advance along the axial direction above the heating furnace 5, each measured portion is Since the rods 9 are inserted into the heating section 5a and stretched at the stretching position X at a speed corresponding to their respective outer diameters, the outer diameters of the rods 9 can be automatically kept constant. .
なお上記実施例においては、送り装［７を一定の速度Ｖ
、として母材１を下降させながら引伸し装ｒｉ８をこの
Ｖ、より速い速度Ｖ、で走行させ、母材ｌを引き伸ばす
ようにしておるがこれに限るものではなく、加熱炉５と
外径測定器６とを母材ｌの下方から上方へ向けて一定速
度Ｖ、で走行させ、上記引伸し装置８のみをこれらとは
逆の方向へ（ｖ２−ｖ＞）の速度でこの母材１を引き伸
すようにしても良い。In the above embodiment, the feeding device [7 is set at a constant speed V
, while lowering the base material 1, the enlarging device ri8 is run at this V, a faster speed V, and the base material 1 is stretched, but the heating furnace 5 and the outer diameter measuring device are 6 and 6 are run from below to above the base material 1 at a constant speed V, and only the enlarging device 8 is used to stretch the base material 1 at a speed (v2-v>) in the opposite direction. You can also do this.
以上説明したようにこの発明のガラス体の延伸方法は、
棒状のガラス体をその両端部で支持し、加熱炉内にて加
熱し軟化せしめたうえ引き伸してガラス体を延伸する際
に、ガラス体が引き伸され始める引き伸し位置に近い上
記ガラス体の未延伸部分の外径を測定し、この外径に基
づいて上記ガラス体の上記未延伸部分における引き伸し
速度を算出し、上記外径を測定した未延伸部分が上記引
き伸し位置に来たときに上記算出した引き延し速度で引
き伸すようにしたものである。よってこの方法によれば
その外径が一様な縮径されたガラス体を極めて効率良く
、しかも自動的に製造することができる。As explained above, the method for stretching a glass body of the present invention is as follows:
When a rod-shaped glass body is supported at both ends, heated in a heating furnace to soften it, and then stretched to stretch the glass body, the above-mentioned glass is near the stretching position where the glass body begins to be stretched. The outer diameter of the unstretched part of the glass body is measured, and the stretching speed of the unstretched part of the glass body is calculated based on this outer diameter, and the unstretched part whose outer diameter is measured is the stretched position. When the paper reaches the target position, the paper is stretched at the stretching speed calculated above. Therefore, according to this method, a reduced glass body having a uniform outer diameter can be manufactured very efficiently and automatically.
第１ｆｊｉ４ないし第３図はそれぞれこの発明のガラス
体の延伸方法の一実施例を示す説明図でるる。
ｌ・・・母材、５・・・加熱炉、５ａ・・・加熱地、６
・・・外径測定器、７・・・送り装置、８・・・引伸し
装置、Ｘ・・・引き伸し位置、ｖｌ・・・引き伸し速度
、■、・・・引き伸し速就、Ｖｓ・・・引き伸し速度。FIGS. 1 to 3 are explanatory diagrams each showing an embodiment of the method for stretching a glass body of the present invention. l...Base material, 5...Heating furnace, 5a...Heating ground, 6
...outer diameter measuring device, 7...feeding device, 8...enlarger, X...enlargement position, vl...enlargement speed, ■,...enlargement speed , Vs... Enlargement speed.
Claims (1)
熱し軟化せしめたうえ引き伸してガラス体を延伸する際
に、 ガラス体が引き伸され始める引き伸し位置に近い上記ガ
ラス体の未延伸部分の外径を測定し、この外径に基づい
て上記ガラス体の上記未延伸部分における引き伸し速度
を算出し、上記外径を測定した未延伸部分が上記引き伸
し位置に来たときに上記算出した引き伸し速度で引き伸
すようにしたことを特徴とするガラス体の延伸方法。[Claims] A stretching process in which a rod-shaped glass body is supported at its both ends, heated in a heating furnace to soften it, and then stretched to stretch the glass body, in which the glass body begins to be stretched. Measure the outside diameter of the unstretched portion of the glass body near the position, calculate the stretching speed in the unstretched portion of the glass body based on this outside diameter, and A method for stretching a glass body, characterized in that when the glass body reaches the stretching position, the glass body is stretched at the stretching speed calculated as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13465184A JPS6114149A (en) | 1984-06-29 | 1984-06-29 | Stretching method of glass body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13465184A JPS6114149A (en) | 1984-06-29 | 1984-06-29 | Stretching method of glass body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6114149A true JPS6114149A (en) | 1986-01-22 |
| JPH0138054B2 JPH0138054B2 (en) | 1989-08-10 |
Family
ID=15133352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13465184A Granted JPS6114149A (en) | 1984-06-29 | 1984-06-29 | Stretching method of glass body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6114149A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61127629A (en) * | 1984-11-26 | 1986-06-14 | Furukawa Electric Co Ltd:The | Hot drawing method of glass |
| EP0881196A1 (en) * | 1997-05-30 | 1998-12-02 | Shin-Etsu Chemical Company, Ltd. | Method for drawing a glass ingot to a rod |
| EP0846665A3 (en) * | 1996-12-09 | 1999-01-07 | Shin-Etsu Chemical Co., Ltd. | Process and apparatus for manufacturing a glass preform for optical fibres by drawing a preform |
| JP2007187466A (en) * | 2006-01-11 | 2007-07-26 | Riken Keiki Co Ltd | Heat conduction type gas sensor |
| EP2428496A1 (en) * | 2010-09-08 | 2012-03-14 | Shin-Etsu Chemical Co., Ltd. | Apparatus for fabricating a glass rod and method of same |
| EP2428495A1 (en) * | 2010-09-08 | 2012-03-14 | Shin-Etsu Chemical Co., Ltd. | Apparatus for fabricating a glass rod and method of same |
-
1984
- 1984-06-29 JP JP13465184A patent/JPS6114149A/en active Granted
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61127629A (en) * | 1984-11-26 | 1986-06-14 | Furukawa Electric Co Ltd:The | Hot drawing method of glass |
| EP0846665A3 (en) * | 1996-12-09 | 1999-01-07 | Shin-Etsu Chemical Co., Ltd. | Process and apparatus for manufacturing a glass preform for optical fibres by drawing a preform |
| EP0881196A1 (en) * | 1997-05-30 | 1998-12-02 | Shin-Etsu Chemical Company, Ltd. | Method for drawing a glass ingot to a rod |
| US6220057B1 (en) | 1997-05-30 | 2001-04-24 | Shin-Etsu Chemical Co., Ltd. | Apparatus and method for drawing a glass ingot |
| JP2007187466A (en) * | 2006-01-11 | 2007-07-26 | Riken Keiki Co Ltd | Heat conduction type gas sensor |
| EP2428495A1 (en) * | 2010-09-08 | 2012-03-14 | Shin-Etsu Chemical Co., Ltd. | Apparatus for fabricating a glass rod and method of same |
| EP2428496A1 (en) * | 2010-09-08 | 2012-03-14 | Shin-Etsu Chemical Co., Ltd. | Apparatus for fabricating a glass rod and method of same |
| CN102399057A (en) * | 2010-09-08 | 2012-04-04 | 信越化学工业株式会社 | Apparatus for fabricating glass rod and method of same |
| CN102399058A (en) * | 2010-09-08 | 2012-04-04 | 信越化学工业株式会社 | Apparatus for fabricating a glass rod and method of same |
| JP2012076989A (en) * | 2010-09-08 | 2012-04-19 | Shin-Etsu Chemical Co Ltd | Apparatus for fabricating glass rod and method for fabricating the same |
| JP2012076990A (en) * | 2010-09-08 | 2012-04-19 | Shin-Etsu Chemical Co Ltd | Apparatus for fabricating glass rod and method for fabricating the same |
| US8881552B2 (en) | 2010-09-08 | 2014-11-11 | Shin-Etsu Chemical Co., Ltd. | Apparatus for fabricating a glass rod and method of same |
| US8904825B2 (en) | 2010-09-08 | 2014-12-09 | Shin-Etsu Chemical Co., Ltd | Apparatus for fabricating a glass rod and method of same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0138054B2 (en) | 1989-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |