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11. 发明专利

JPH02307839A DEVICE FOR PRODUCING OPTICAL FIBER PREFORM 失效
公开(公告)号：JPH02307839A
公开(公告)日：1990-12-21
申请号：JP12977889
申请日：1989-05-23
申请人： FUJIKURA LTD
发明人： WADA ROU , NAKAYAMA KOYO , HATASA KAZUHIRO , SASAGAWA TOSHIKATSU
IPC分类号： G02B6/00 , C03B37/014 , C03B37/018
摘要： PURPOSE:To increase the growth rate of an optical fiber preform by providing an annular path for circulating plural burners on a traverse rail. CONSTITUTION:Plural burners 18, 19, 32 and 33 are successively moved at a specified velocity on a common linear path A' (=B') along a core 1a at regular intervals from one end of the core 1a to the other end, and a combustion gas is blown on the core to grow a preform 1 on the core 1a. The burners 18, 19, 32 and 33 are separately driven by driving carriages 10, 11, 23 and 24 with motors 12, 13, 25 and 26. When a burner reaches the other end of the core 1a, the blowing of the combustion gas is stopped, and the burner is returned to the one end through the return paths A and B.

12. 发明专利

JPS63144139A LATHE FOR HEATING 失效
公开(公告)号：JPS63144139A
公开(公告)日：1988-06-16
申请号：JP28836086
申请日：1986-12-03
申请人： FUJIKURA LTD
发明人： YAMAUCHI RYOZO , WADA AKIRA , UEHARA TOSHIAKI , SASAGAWA TOSHIKATSU , NAKAYAMA KOYO
IPC分类号： G02B6/00 , C03B8/00 , C03B8/04 , C03B37/018
摘要： PURPOSE:To reduce the weight of a chuck rotating mechanism to enable the continuous and accurate measurement of the weight of the object to be heated and to prevent the angular deviation between chucks to improve the working accuracy, by holding an object for heating with a pair of chucks and heating the object while synchronously rotating the chucks with a specific electrical controlling means. CONSTITUTION:Two chucks 11, 12 are rotatably attached to a U-shaped supporting table 10 and an object 1 to be heated, e.g. glass rod or glass pipe is held between the chucks 11 and 12. A chuck 11 is rotated with a small-sized DC motor 31 via a rotary pulse encoder 32 generating 10,000 pulse signals PS per one revolution and transmitting the rotary angle of the chuck 11 as an electrical pulse signals. The signals PS are transmitted via a frequency divider 33 to a power source 34 for a pulse motor 35. Driving pulses DP are transmitted from the source to the pulse motor 35 to effect the synchronous revolution of the chucks 11 and 12. Since the mechanical transmission mechanism is eliminated and a low-output motor can be utilized in the present process, the weight of the lathe can be reduced.

13. 发明专利

JPS5915090B2 JPS5915090B2 - 失效
公开(公告)号：JPS5915090B2
公开(公告)日：1984-04-07
申请号：JP7918677
申请日：1977-07-02
申请人： Fujikura Ltd
发明人： TAKAHASHI YOSHIHIRO , INADA KOICHI , YAMAUCHI RYOZO , ARAKI SHINJI , SASAGAWA TOSHIKATSU
IPC分类号： C03B20/00 , C03B37/012 , G02B6/00
CPC分类号： C03B37/01211

14. 发明专利

JPH04164227A METHOD OF TESTING PROOF OF TENSION OF OPTICAL FIBER 失效
公开(公告)号：JPH04164227A
公开(公告)日：1992-06-09
申请号：JP29143790
申请日：1990-10-29
申请人： FUJIKURA LTD
发明人： SASAGAWA TOSHIKATSU
IPC分类号： G01N3/00 , G01M11/00 , G01N3/08
摘要： PURPOSE:To continuously test the proof of tension by increasing the take-up speed of a second take-up device so that it is higher than the take-up speed of a first take-up device by such a desired value that is determined in accordance with a running distance between two take-up devices. CONSTITUTION:An optical fiber 1 payed out from a feed device 5 is led through a first take-up device 2, and is turned in its direction by a guide roller 4, and is wound up a wind-up device 6 through a second take-up device 3. In this phase, during wind-up, the take-up speed V2 of the device 3 is set to be higher than the take-up speed V2 of the device 2 by a value (v), and accordingly, the optical fiber 1 is elongated between the devices 2, 3 with a rate of elongation given by v/LX100% where L is a running distance between the devices 2, 3. Accordingly, the rotational speeds M1, M2 of motors M1, M2 are set to desired values. Thereby, it is possible to give a desired elongation rate to the optical fiber 1.

15. 发明专利

JPH03223133A DEHYDRATION SINTERING FURNACE 失效
公开(公告)号：JPH03223133A
公开(公告)日：1991-10-02
申请号：JP1958290
申请日：1990-01-30
申请人： FUJIKURA LTD
发明人： HATASA KAZUHIRO , NAKAYAMA KOYO , SASAGAWA TOSHIKATSU
IPC分类号： C03B37/014 , C22B1/20 , F27D11/02
摘要： PURPOSE:To eliminate the need of installing a heater in an inert gas and enable uniform heating of soot by providing the heater composed of a specific material near the outer side of the soot installed in the central part in a furnace so as to afford a uniform heat distribution in the longitudinal direction in the furnace. CONSTITUTION:Vapor of a glass material is deposited on the periphery of a dummy rod 1 to produce a soot 2, which is then placed in the central part of a dehydration sintering furnace. A heater 4 composed of silicon carbide or a material having an oxide film formed on the silicon carbide or molybdenum disilicide or a material having an oxide film formed on the molybdenum disilicide is provided on the outside and near the side of the soot 2 so as to provide nearly a uniform heat distribution in the longitudinal direction in the furnace. Furthermore, a heat insulating material 5 is provided on the outside of the heater 4 to heat the soot with the heater 4, homogeneously dehydrate and sinter the soot 2. Thereby, the set temperature of the heater 4 can be decreased and dehydration sintering time can be shortened.

16. 发明专利

JPH0340941A COATING METHOD FOR OPTICAL FIBER 失效
公开(公告)号：JPH0340941A
公开(公告)日：1991-02-21
申请号：JP17512189
申请日：1989-07-06
申请人： FUJIKURA LTD
发明人： SASAGAWA TOSHIKATSU , HATASA KAZUHIRO , WADA AKIRA
IPC分类号： G02B6/44 , C03C25/10 , C03C25/12
摘要： PURPOSE:To accurately supply coating material according to the wire drawing velocity of optical fiber by introducing both the raw liquid of coating material and a curing agent into the separately sealed vessels and exerting gas pressure to force-feed them to a two-layer die spot via the respective carrier pipes. CONSTITUTION:The raw liquid I of coating material is introduced into a sealed vessel 20 and a curing agent II is introduced into the other sealed vessel 21. Inert gas is supplied to the sealed vessels 20, 21 respectively via the feed pipes 22, 23 of gas pressure. The raw liquid I and the curing agent II are separately force-fed to a two-layer die spot 26 via the carrier pipes 24, 25 and thereafter discharged from the die spot 26. The bare wire of optical fiber which is wire- drawn and passed on the central axial line of the die spot 26 is applied with the raw liquid I and the curing agent II. When the gas pressure of the sealed vessels 20, 21 is changed according to the wire drawing velocity, the application volume of the coating material discharged from the die spot 26 accurately is obtained.

17. 发明专利

JPS63170236A DEVICE FOR PRODUCING OPTICAL FIBER BASE MATERIAL 失效
公开(公告)号：JPS63170236A
公开(公告)日：1988-07-14
申请号：JP31566186
申请日：1986-12-29
申请人： FUJIKURA LTD
发明人： SASAGAWA TOSHIKATSU
IPC分类号： G02B6/00 , C03B37/012 , C03B37/014 , C03B37/018
摘要： PURPOSE:To obtain the title production device wherein the attachment and detachment of a seed rod to and from respective mechanisms are automated to save labor and the whole of which is miniaturized, by performing a series of actions from the carrying in to carrying out of the seed rod with respective lifting, rotating, and turning mechanisms to transfer the seed rod between the mechanisms. CONSTITUTION:The intermediate part of the seed rod 13 is held by a seed rod carrying in mechanism 30, and the rod is pulled up, turned to the lifting line of a first lifting and rotating mechanism, and transferred to the rotating mechanism. After the mechanism 30 recedes, the rotating mechanism is lowered to lower the lower end of the seed rod 13 to a soot spray mechanism 3, and the soot 14 is sprayed on the seed rod 13 under such conditions. Meanwhile, the seed rod 13 is rotated and lifted by the rotating mechanism at slow speed. When the predetermined amt. of the soot 14 is deposited, the seed rod 13 is pulled up close to the upper limit by the rotating mechanism, the arm of a seed rod moving mechanism 50 is turned toward the seed rod 13, and the seed rod 13 is received from the rotating mechanism. The seed rod 13 deposited with the soot 14 is moved by the mechanism 50 to a seed lifting and rotating mechanism, the upper end of the seed rod is held by the mechanism, and the seed rod 13 is received from the mechanism 50.

18. 发明专利

JPS5785962A METHOD AND DEVICE FOR SCALPING TREATMENT OF SCRAP OF SEED WIRE INFORMATION OF COPPER HOT DIPPING COATING 失效
公开(公告)号：JPS5785962A
公开(公告)日：1982-05-28
申请号：JP16246080
申请日：1980-11-18
申请人： FUJIKURA LTD
发明人： SASAGAWA TOSHIKATSU , SUZUKI EIRIYOU , YASUOKA YASUJI , KAWABATA MITSURU , YAMAGUCHI TETSUO , SAKAI MASAAKI
IPC分类号： C23C2/00 , B23D79/12 , B65H54/56 , B65H65/00 , B65H75/22 , B65H75/28 , C22B15/00 , C23C2/02 , C23C2/04 , C23C2/38
摘要： PURPOSE:To melt and reuse the copper scraps produced at the scalping of a seed copper wire in formation of copper hot dipping coating as copper for dip coating without oxidizing the copper scraps by coiling the same with a compression coiler of specific construction. CONSTITUTION:A copper wire 1 of a seed wire is passed through a die 4 of a shaving device to scalp the surface of the wire 1. This wire is passed through the inside of the molten copper whereby it is applied with copper hot dip coating. At this time, plural lines of cord-like copper scraps 9 produced from the die 4 are passed beforehand through a guide 10 and are thereby unified to a bundle, after which this bundle is supplied to a coiling compression device 11. The device 11 is constituted of a coiling reel 12 consisting of two pieces of width determining discs and a screw down disc 13 inserted with a rotary disc into between the width determining disc in the upper part thereof. The shafts of the two width determining discs are meshed by tooth profiles, and the scraps 9 are fixed into the tooth profiles of both shafts, after which the scraps are pressurized with the disc 13 under revolution, whereby a compact and doughnut-shaped compressed scrap is formed. Since this is put into a copper melting furnace, there is no need for opening the inlet of a preheating furnace, hence oxidation by the intrusion of air does not occur.

19. 发明专利

JPS5778507A Production of ion crystal optical fiber 失效
标题翻译：离子晶体光纤的生产
公开(公告)号：JPS5778507A
公开(公告)日：1982-05-17
申请号：JP15559580
申请日：1980-11-05
申请人： Fujikura Ltd
发明人： SHIODA TAKAO , SASAGAWA TOSHIKATSU
IPC分类号： G02B1/02 , C03B37/012 , C03C13/00 , G02B6/00
CPC分类号： C03C13/008 , C03B37/01288 , C03B2201/84
摘要： PURPOSE:To ensure the adhesive properties and the smoothness of interface for the core and cladding, by forming the cladding of ion crystal by using an extruder having a crosshead die for a core fiber which is previously formed with the ion crystal. CONSTITUTION:A core fiber 1 of ion crystal is led into a pierced hole 5 of a mandrel 4 provided at the center part of a crosshead die 3 of an extruder 2. At the same time, the ion crystal powder 7 which is turned into a cladding is filled into a barrel 6. The powder 7 is pressed by a ram 9 heated by a heater 8 up to a temperature lower than the melting point to be plasticized, flows into the die 3 through the tip of the barrel 6, sticks to the outside of the fiber 1 which is led through the hole 5 at a lip part 10 to form a cladding 11. In this case, an end of the mandrel 4 is connected to a vacuum pump 14 through a pipe 13 to reduce the pressure within the mandrel 4.
摘要翻译：目的：为了确保芯和包层的粘合性能和界面的平滑度，通过使用具有预先形成离子晶体的芯纤维的具有十字头的挤出机形成离子晶体的包层。构成：将离子晶体的芯纤维1引入设置在挤出机2的十字头模具3的中心部的心轴4的穿孔5中。同时，将离子晶体粉末7变成将包层填充到筒体6中。粉末7被加热器8加热的压头9挤压至低于要塑化的熔点的温度，通过筒体6的尖端流入模具3，粘附到纤维1的外部，其在唇部10处被引导通过孔5以形成包层11.在这种情况下，心轴4的端部通过管13连接到真空泵14，以减小内部的压力心轴4。

20. 发明专利

JPS55149659A COATING METHOD FOR BLANK WITH COATING MATERIAL 失效
公开(公告)号：JPS55149659A
公开(公告)日：1980-11-21
申请号：JP5834479
申请日：1979-05-11
申请人： FUJIKURA LTD
发明人： SASAGAWA TOSHIKATSU , FUKUDA TAKERU , SATOU MASAHIRO
IPC分类号： B05C3/12 , B05C9/06 , B05D1/18 , B05D1/34 , B05D7/20 , C03B25/02 , C03B37/00 , C03C25/10 , G02B6/44 , H01B13/00 , H01B13/16
摘要： PURPOSE:To coat liquefied coating materials without mixing them, to increase line speep and to prevent eccentricity by a method wherein the liquefied coating materials in crucibles at the inside and the outside are kept within ranges that the materials move between each outlet in laminar flow shape and the surface of a blank is simultaneously coated. CONSTITUTION:A double crucible is used which an outlet 101 of an inside crucible 10 is upward shifted only by distance S in the axial direction from an outlet 121 of an outside crucible 12, an optical fiber 14 is downward projected on the center line, and a primary coating and a cushion layer are simultaneously coated. However, the said coating is done keeping the travelling speed of the optical fiber 14 and the distance S between the outlets within ranges that resin 18 for the primary coat, which adheres on the fiber and flows out from the inside crucible 10, and resin 16 for the cushion layer mutually move between the outlets 101 and 121 in laminar flow shape.

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