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1. 发明专利

JPH06289262A OPTICAL FIBER CABLE 失效
公开(公告)号：JPH06289262A
公开(公告)日：1994-10-18
申请号：JP7365393
申请日：1993-03-31
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： SHIONO TAKEO , CHIBA MINORU , NAKAMURA HIROSHI , INOUE NAOYA , ISHIDA YOSHIO
IPC分类号： G02B6/44
摘要： PURPOSE:To prevent the propagation of microorganisms penetrating into an optical fiber cable together with water and to perfectly prevent damage by microorganisms. CONSTITUTION:The periphery of a spacer 1 with coated optical fibers 4 housed inn grooves 3 is spirally wound with a water absorbing tape 9 being wrapped width wise formed by coating the surface of a tape-shaped substrate 5 with powder 6 of a water absorbing polymer and particles 7 of an inorg. antibacterial agent or sterilizing agent dispersed in a rubber based binder 8 so that the coating layer of the water absorbing polymer, etc., faces the spacer 1. The resulting winding layer of the water absorbing tape 9 is covered with a plastic sheath 10 of low density PE, etc.

2. 发明专利

JPH06148478A METHOD FOR CONTROLLING SHAPE OF OPTICAL FIBER TAPE 失效
公开(公告)号：JPH06148478A
公开(公告)日：1994-05-27
申请号：JP29463392
申请日：1992-11-02
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： CHIBA MINORU , INOUE NAOYA , SHIONO TAKEO , ITO MITSUO , YAGI KENJI
IPC分类号： G02B6/44
摘要： PURPOSE:To monitor the shape of an optical fiber tape on line and produce the optical fiber tape excellent in outside appearance and characteristics. CONSTITUTION:In the case of producing the optical fiber tape T providing a resin coating on plural coated optical fiber by dime 2, the image of the shape of the optical fiber tape T fed to a receiving machine 4, especially, the thickness of the coating picked up by a CCD camera 6 set behind a resin hardening device 3, and the video is analyzed by an image processing means 7, and the position of the inclination of the die 2 is finely adjusted based on the result of the analysis so as to control to prevent the dispersion of thickness at both ends. When the image is picked up by the CCD camera 6, the video is made clear by attaching the liquid whose refractive index is >=1.35 to the optical fiber tape.

3. 发明专利

JPS6266507A JELLY COMPOUND FOR CABLE 失效
公开(公告)号：JPS6266507A
公开(公告)日：1987-03-26
申请号：JP20571985
申请日：1985-09-18
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： CHIBA MINORU
IPC分类号： C08L23/18 , C08K3/34 , C08K3/36 , C08K7/00 , C08K7/18 , C08L7/00 , C08L9/08 , C08L21/00 , C08L23/00 , C08L91/00 , C08L101/00 , H01B3/28 , H01B3/30 , H01B7/28 , H01B7/282

4. 发明专利

JPH07134230A SPLIT TYPE COATED OPTICAL FIBER RIBBON 失效
公开(公告)号：JPH07134230A
公开(公告)日：1995-05-23
申请号：JP28316593
申请日：1993-11-12
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： INOUE NAOYA , ITO MITSUO , SHIONO TAKEO , SEKI TOSHIKUNI , CHIBA MINORU
IPC分类号： C03C25/10 , G02B6/08 , G02B6/44 , C03C25/02
摘要： PURPOSE:To provide a split type coated optical fiber ribbon which enables coated fibers to be splitted at need, such as for branching treatment, and does not generate the unnecessary splitting of the coated fibers at the time of cabling, etc. CONSTITUTION:This split type coated optical fiber ribbon is formed by paralleling plural pieces of the coated optical fiber ribbons 13 provided with common protective coatings 13 on the outer peripheries of plural paralleled optical fibers 11, bonding the respective coated optical fiber ribbons 13 with a binder 14 and molding the material to be a tape form of a nearly equal thickness. The common protective coating 12 is so formed that the thickness at the edges facing each other of the respective coated optical fiber ribbons 13 is smaller than the thickness in the central part, thereby, the bonding force by the binder 14 between the coated optical fiber ribbons 13 is increased.

5. 发明专利

JPH06183790A PRODUCTION OF COATED OPTICAL FIBER 失效
公开(公告)号：JPH06183790A
公开(公告)日：1994-07-05
申请号：JP33620192
申请日：1992-12-16
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： ISHIDA YOSHIO , SHIONO TAKEO , CHIBA MINORU , INOUE NAOYA
IPC分类号： C03C25/10 , C03C25/12 , G02B6/44 , C03C25/02
摘要： PURPOSE:To produce a coated optical fiber having a stabilized resin coating layer enhanced in cross-linking degree by cross-linking and curing an UV-curing resin applied on an optical fiber while controlling the cross-linking degree. CONSTITUTION:An optical fiber is made to pass through a coating die, coated with an UV-curing resin and irradiated with UV, and the resin is cross-linked and cured. The potential of the resin coating layer with respect to the ground 13 (electrification voltage) is measured by a voltmeter 12, and the coated optical fiber is wound through a take-out mechanism. The signal from the voltmeter 12 is sent to a CPU 14, the cross-linking degree, etc., are detected, and the control signal of the take-off speed or the current value control signal of an UV lamp is emitted.

6. 发明专利

JPH06144879A METHOD FOR ASSESSING HARDNESS OF ULTRAVIOLET LIGHT-CURED RESIN FILM ON OPTICAL FIBER 失效
公开(公告)号：JPH06144879A
公开(公告)日：1994-05-24
申请号：JP29464092
申请日：1992-11-02
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： INOUE NAOYA , CHIBA MINORU , ISHIDA YOSHIO , SHIONO TAKEO , ITO MITSUO , YAGI KENJI
IPC分类号： C03C25/10 , G02B6/44 , C03C25/02
摘要： PURPOSE:To easily assess the hardness of the ultraviolet light-cured resin film on optical fibers. CONSTITUTION:One end 3a of an optical fiber strand 3 is fixed in air, while the other end 3b is placed in a solvent 5 so as to immerse a specified length thereof in the solvent. A region for a detective section 10 equipped with a light source 7 and a photosensor 8 is provided under the other end 3b a specified length away therefrom. The ultraviolet light-cured resin film 2 is swollen by the solvent 5, resulting in lowering the position of the other end 3b which is then sensed by the detective section 10; this time is measured. The higher is the hardness (degree of cross-linking) of the film 2, the more resistant to swelling said film; thereby, the hardness of the film can be assessed with the time measured above. Sampling of a specimen to be assessed can easily be made. As the specimen (a fragment) can directly be immersed in the solvent 5, this operation can also be conducted even in a production site and the production efficiency for coated optical fibers can greatly be improved, and the above- mentioned hardness can be assessed quantitatively with time.

7. 发明专利

JPH0643345A COATED OPTICAL FIBER 失效
公开(公告)号：JPH0643345A
公开(公告)日：1994-02-18
申请号：JP19985992
申请日：1992-07-27
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： CHIBA MINORU , INOUE NAOYA , ISHIDA YOSHIO , SHIONO TAKEO
IPC分类号： C03C25/24 , G02B6/44 , C03C25/02
摘要： PURPOSE:To provide transmission characteristic with low light transmission loss and high stability by providing a coated layer made of UV curing resin whose coefficient of contraction for length size by heating on an optical fiber is specified. CONSTITUTION:A primary layer 2 and a buffer layer 3 are formed on the optical fiber 1 consisting of core with high refractive index and clad with low refractive index, respectively by applying the UV curing resin whose coefficient of contraction for length size by the heating of a curing material is less than 0.5%. As the UV curing resin, for example, urethane acrylate resin, etc., can be used, and the primary layer 2 and the buffer layer 3 can be formed by combining the resin with low Young's modulus and the one with high Young's modulus out of such resin. Thereby, the contraction of a resin coated layer by the heating can be suppressed and stress by the contraction of the optical fiber is scarcely generated. Therefore, the transmission characteristic scarcely increasing the light transmission loss and with high stability can be possesed.

8. 发明专利

JPH0640747A METHOD FOR JUDGING CURING DEGREE OF UV-CURING RESIN COATING OPTICAL FIBER 失效
公开(公告)号：JPH0640747A
公开(公告)日：1994-02-15
申请号：JP5360492
申请日：1992-03-12
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： INOUE NAOYA , CHIBA MINORU , SHIONO TAKEO
IPC分类号： C03C25/10 , G02B6/44 , C03C25/02
摘要： PURPOSE:To provide a method useful to control the curing degree of a UV- curing resin coating a coated optical fiber in the production line and capable of easily and accurately judging the curing degree of the UV-curing resin on a coated optical fiber in a short time. CONSTITUTION:An optical fiber coated with a UV-curing resin is immersed in methyl ethyl ketone, the time required to perfectly remove the UV-curing resin coating from the optical fiber is measured and the result is compared with that of a standard sample having a known curing degree measured beforehand to judge the curing degree of the UV-curing resin.

9. 发明专利

JPH0634857A OPTICAL FIBER UNIT 失效
公开(公告)号：JPH0634857A
公开(公告)日：1994-02-10
申请号：JP19518092
申请日：1992-07-22
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： CHIBA MINORU , MURAMATSU YOSHITAKA , UEMATSU AKIRA
IPC分类号： C03C25/24 , G02B6/44 , C03C25/02
摘要： PURPOSE:To lessen transmission loss and to maintain a good forced feeding characteristic even at a high temp. by providing a foam layer consisting of low-density polyolefin on the outer peripheries of coated optical fibers and providing a plastic skin layer having good lubricity thereon. CONSTITUTION:Six pieces of the coated optical fibers 1 are stranded together with a polyester cord 2 for tearing and a nylon resin coating 3 is applied thereon. The surface of this nylon resin coating 3 is then extrusion coated with low-density polyethylene (LDPE) which is expanded to form the foam layer 4. Further, the surface of this foam layer 4 is extrusion coated with high-density polyethylene (HDPE) to form a skin layer 5. The foam layer 4 consisting of the LDPE and the plastic skin layer 5 consisting of the HDPE are preferably so formed that the sectional area of the plastic skin layer 5 attains a 5 to 70% range of the sectional area totaling the sectional areas of the two layer 4, 5. The high-temp. forced feeding characteristic degrades if the above- mentioned sectional area is below 5% and the transmission loss increases if the sectional area exceeds 70%.

10. 发明专利

JPH0588058A OPTICAL FIBER UNIT 失效
公开(公告)号：JPH0588058A
公开(公告)日：1993-04-09
申请号：JP3628391
申请日：1991-03-01
申请人： SHOWA ELECTRIC WIRE & CABLE CO
发明人： CHIBA MINORU , MURAMATSU YOSHITAKA , SHIONO TAKEO , UEMATSU AKIRA , SANO SEIICHIRO
IPC分类号： G02B6/44 , G02B6/46 , H02G1/08
摘要： PURPOSE:To improve the forcible feeding characteristic of an air blow fiber system by incorporating fillers into foamed low-density polyethylene (LDPE) constituting a foamed coating layer and specifying the compounding weight of the fillers with a base resin. CONSTITUTION:The foamed LEPE compsn. of the optical fiber unit constituted by providing the foamed layer 4 consisting of the foamed LDPE compsn. via a common coating layer 3 on plural optical fibers 1 is so formed as to contain 1 to 30PHR (compounding pts.wt. per 100 pts.wt. resin), more preferably 3 to 20PHR filler. The filler particles having the m.p. higher by >=20 deg.C than the resin for the base are compounded as the fillers. The appearance of the foamed layer 4 is made into a uniformly roughened state in this way and the effect of a lubricant is generated. The optical fiber unit for the air blow fiber system having the excellent forcible feeding characteristic and productivity is obtd.

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