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1. 发明专利

CA2143774A1 OPTICAL FIBER CABLE CONTAINING RIBBON FIBERS 未知
公开(公告)号：CA2143774A1
公开(公告)日：1995-12-04
申请号：CA2143774
申请日：1995-03-02
申请人： FUJIKURA LTD
发明人： SAWANO HIROYUKI , YAMANAKA MASAYOSHI , KUROSAWA YUTAKA , MIYAMOTO MATSUHIRO
IPC分类号： G02B6/44
摘要： In a so-called loose tube optical fiber cable with SZ stranding in which tube units receiving laminated two or more multicore ribbons are stranded toward a central member and its stranding direction is reversed at specific intervals, these multicore ribbons are twisted in the same direction as the stranding of the tube units and a reverse stranding angle of the tube units is selected to be a value within a specific scope, whereby it is possible to relax tension or compression of the multicore ribbons caused by bending of the optical fiber cable, and to decrease a transmission loss as much as possible.

2. 发明专利

JPH09311228A OPTICAL CABLE CLOSURE 失效
公开(公告)号：JPH09311228A
公开(公告)日：1997-12-02
申请号：JP12880896
申请日：1996-05-23
申请人： FUJIKURA LTD
发明人： UENOYAMA MAKOTO , KUROSAWA YUTAKA , JINBO KUNIHIKO , HIRAO HIDEO
IPC分类号： G02B6/24 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide an optical cable closure with which the execution of work, such as switching of connection, in a hot-line state is made possible by preventing the vibration of separated and turned trays. SOLUTION: This optical fiber closure is constituted to prevent the vibration of open trays 23 relative to a connecting rod 22 by pressing the open trays 23 by means of hook-and-loop fasteners 32 to a supporting bar 31 and holding the open trays 23 integrally with the connecting bar 22. The influence of the vibration acting on the coated optical fibers 26 and optical connector 27 is lessened.

3. 发明专利

JPH0688928A OPTICAL FIBER CABLE 失效
公开(公告)号：JPH0688928A
公开(公告)日：1994-03-29
申请号：JP23866492
申请日：1992-09-07
申请人： FUJIKURA LTD
发明人： KOBAYASHI KAZUNAGA , KUROSAWA YUTAKA , ARAKI SHINJI
IPC分类号： G02B6/44
摘要： PURPOSE:To provide the optical fiber cable which can house coated optical fibers at a high density, has excellent flexibility and can maintain the uniformity of the optical transmission characteristics of the respective coated fibers against the physical deformation including bending. CONSTITUTION:This optical fiber cable is constituted by housing plural pieces of coated fiber ribbons 5 which are arrayed with plural pieces of the coated optical fibers 1 in parallel and are integrally molded to have arc-shaped cross sections into a tube 3. The respective coated fiber ribbons 5 of the cable are arranged annularly by directing the projecting surfaces of the arc-shaped surfaces thereof toward the outer side. The ends 51 on one side of the respective coated fiber ribbons are in contact or proximity to or with the inside surface of the tube 3 and the ends 52 on the other side is in contact or proximity to or with the recessed surface parts 53 of the coated fiber ribbons 5' adjacent thereto.

4. 发明专利

JPH05134122A COATED FIBER OF OPTICAL FIBER TAPE 失效
公开(公告)号：JPH05134122A
公开(公告)日：1993-05-28
申请号：JP32379391
申请日：1991-11-12
申请人： FUJIKURA LTD
发明人： KUROSAWA YUTAKA , KOBAYASHI KAZUNAGA , ARAKI SHINJI
IPC分类号： B01J19/12 , C03C25/10 , G02B6/08 , G02B6/44
摘要： PURPOSE:To prevent intrusion of water into coated fibers of an optical fiber tape, and to reduce the weight and the diameter of an optical cable by providing at outer layer as a package coating layer, which is impregnated with a resin having waterproof effect. CONSTITUTION:A coated-fiber tape 15 is provided with a package coating layer 17, on the surface of which an outer layer 17a is impregnated with a resin having a waterproof effect. The outer layer 17a is impregnated with a waterproof resin such as a liquid asphalt of low viscosity, a silicone resin, or fat and oil, in the fine network structure of the surface of the package coating layer 17 comprising ultraviolet hardening resin and so on. When the coated- fiber tape 15 is to be manufacture, after coated-fiber tape is manufactured following a general method, it is passed through a waterproof resin of low viscosity, such as liquid asphalt, silicone resin or fat and oil, for a predetermined period of time. A waterproof resin of viscosity of no more than 100cps is preferred to deeply impregnate the package coating layer 17 with the waterproof resin through the fine network structure of the package coating layer 17.

5. 发明专利

JPH0572448A COATING DIE FOR PRODUCTION OF COATED OPTICAL FIBER FOR OPTICAL FIBER TAPE 失效
公开(公告)号：JPH0572448A
公开(公告)日：1993-03-26
申请号：JP26287991
申请日：1991-09-13
申请人： FUJIKURA LTD
发明人： KUROSAWA YUTAKA , KOBAYASHI KAZUNAGA , ARAKI SHINJI
IPC分类号： B29C41/40 , C03C25/12 , G02B6/44
摘要： PURPOSE:To prevent the damage of optical fibers, the distortion of coating layers and the degradation in light loss characteristics by contact of the optical fibers and the die hole or nipple hole of the coating die by treating the inside wall surfaces of the die hole and the nipple hole to

6. 发明专利

JPH0570182A PRODUCTION OF OPTICAL FIBER ELEMENT WIRE 失效
公开(公告)号：JPH0570182A
公开(公告)日：1993-03-23
申请号：JP26110891
申请日：1991-09-12
申请人： FUJIKURA LTD
发明人： KUROSAWA YUTAKA , KOBAYASHI KAZUNAGA , ARAKI SHINJI
IPC分类号： C03C25/10 , G02B6/44
摘要： PURPOSE:To provide a method for producing an optical fiber element wire by forming a thin film having a uniform film thickness on an optical fiber bare wire from a coating resin solution. CONSTITUTION:An optical fiber element wire 19 is produced by a method for passing an optical fiber bare wire 18 through a coating die 11 in which a resin coating solution is stored and forming a coating resin film on the outer periphery of the optical fiber bare wire 18. In the process, plural coating resin feed holes 14 are circumferentially arranged and formed in the upper part of the coating die 11 and a coating resin solution is then fed from the coating resin feed holes 14 to form a thin film of the coating resin solution. The optical fiber bare wire 18 is then passed through the thin film and the viscosity of the above-mentioned coating resin solution is regulated to >=5000 cP.

7. 发明专利

JPH0519150A COATED OPTICAL FIBER TAPE AND OPTICAL CABLE USING THE SAME 失效
公开(公告)号：JPH0519150A
公开(公告)日：1993-01-29
申请号：JP19706491
申请日：1991-07-11
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KAZUNAGA , KUROSAWA YUTAKA , ARAKI SHINJI , SAWANO HIROYUKI , TOMITA SHIGERU
IPC分类号： G02B6/08 , G02B6/44
摘要： PURPOSE:To prevent an increase of a transmission loss of an optical fiber being in both side position of a coated optical fiber tape, in the optical cable constituted by supporting plural pieces of coated optical fiber tapes formed integrally by a batch covering layer by arranging plural pieces of optical fibers whose outside diameter is

8. 发明专利

JPH04316006A COATING DIE FOR MANUFACTURE OF COATED OPTICAL FIBER TAPE 失效
公开(公告)号：JPH04316006A
公开(公告)日：1992-11-06
申请号：JP10985691
申请日：1991-04-15
申请人： FUJIKURA LTD
发明人： KUROSAWA YUTAKA , KOBAYASHI KAZUNAGA , ARAKI SHINJI
IPC分类号： G02B6/44
摘要： PURPOSE:To manufacture the optical fiber of a coated optical fiber tape structured by arraying >=2 coated optical fibers (coated optical fiber of single tape), united by arraying plural optical fibers in parallel and forming a primary jacket coat layer on their peripheries, in parallel and forming a secondary jacket coat layer on their peripheries in one body. CONSTITUTION:A coating die hole 6 is sectioned flatly, at least one of the opposite planes of the die hole 6 in the long-axis direction is formed by using an elastic body 5, and the coated optical fiber tape passing through the die hole 6 are energized toward the other plane. Even when primary jacket coat layer of the single coated optical fiber tape passing through the die hole various in sectional size locally, the single coated fiber tape can smoothly pass through the hole, strain is prevented from being generated between the jacket cost layers, and the coated optical fiber tape having a small difference from the internal size of the die hole can easily be passed through the die hole.

9. 发明专利

JPH04163404A MANUFACTURE OF THIN TYPE OPTICAL FIBER TAPE CORE WIRE 失效
公开(公告)号：JPH04163404A
公开(公告)日：1992-06-09
申请号：JP28938590
申请日：1990-10-26
申请人： FUJIKURA LTD
发明人： KOBAYASHI KAZUNAGA , KUROSAWA YUTAKA , ARAKI SHINJI
IPC分类号： G02B6/04
摘要： PURPOSE:To prevent optical fibers from being broken by passing an optical fiber bundle which is composed of a plurality of optical fibers arranged in parallel through a dice hole where one side is formed by a metal or the like and the other side formed by a softer material. CONSTITUTION:There is used a dice 15 which consists of a rubber block 12 loaded on a metal block 11 which is formed with a groove to be a dice hole 10 on the upper surface and fixed by means of fixing pins 13, and provided with a supplying passage 14 made of ultraviolet ray resin communicating with the dice hole 10. It is recommended that the dimension of the dice hole 10 in the minor diameter direction shall not be greater than the outer diameter of an element wire 2 plus 20mum, and the dimension in the major diameter direction shall not be greater than the width of the element wire bundle plus 100mum. There are inserted into the dice hole 10 of this dice 15a plurality of optical fiber element wires 2 in the condition of the element wires arranged in parallel along in the horizontal direction. Then, thenon-hardened ultraviolet ray hardening type resin is supplied from the supplying passage 14, and resin coating is applied to an element wire bundle 16. Urethane acrylate, epoxyacrylate or the like is included in this resin. Then, the element wire bundle 16 is introduced into a hardening device 5 to harden the resin by ultraviolet rays.

10. 发明专利

JPH09325230A CONNECTING STRUCTURE OF OPTICAL FIBER 失效
公开(公告)号：JPH09325230A
公开(公告)日：1997-12-16
申请号：JP14629896
申请日：1996-06-07
申请人： FUJIKURA LTD
发明人： KUROSAWA YUTAKA , HIRAO HIDEO , JINBO KUNIHIKO , OGATA KAZUYA
IPC分类号： G02B6/24
摘要： PROBLEM TO BE SOLVED: To prevent the influence on the transmission of light signals even at the time of movement of a connection reinforcing member and to improve the reliability of transmission by ordinarily maintaining the radius of curvature of optical fibers to a specific length or above by flexible covering materials for covering the parts of the optical fibers exposed near the connection reinforcing member. SOLUTION: The reinforcing sleeve 20 is brought into tight contact with the circumference of an optical fiber fusing part 11 by thermally shrinking the sleeve after the sleeve is mounted at the outer side of the optical fiber fusing part 11, by which the sleeve is molded to a rod shape of a circular shape in section. The protective tubes 21 are formed of the materials, such as rubber, having flexibility, and are cylindrical members having a length size of about some tens mm which maintain the radius of curvature of >=30mm at all times, thereby permitting the curving of the optical fibers 10. The protective tubes 21 are formed to the shape with which their inside surfaces are mounted in tight contact with the outer peripheral surface of the optical fibers 10 as a whole. The tubes are fixed to the reinforcing sleeve 20 by their own shrinkage force when their one-side ends 22 are put on the outer side of the reinforcing sleeve 20.

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