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1. 发明专利

JP2000009974A COATED OPTICAL FIBER RIBBON 失效
公开(公告)号：JP2000009974A
公开(公告)日：2000-01-14
申请号：JP18963698
申请日：1998-06-22
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KAZUNAGA , ISHIDA KATSUYOSHI , OHASHI KEIJI , KASHIMA YOSHIO , IEDA KOJI
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To reduce the optical path length difference (skew) of optical fibers in the twisted state of a coated optical fiber ribbon by making the optical path lengths of respective fibers longest at the central fibers and increasingly shorter toward both ends. SOLUTION: When the coated optical fiber ribbon 1 is twisted, the optical fibers 2 on the outer side of the central No. 6 fiber and No. 7 fibers are put into a stretched state. The elongation differences of the respective fibers 2 attain the value calculated in accordance with L=((2πR)2+P2)1/2. P is a pitch; L is a locus length of the coated fiber 1 per pitch and R is the distance from the ribbon center to the center of the coated fiber 1. Differences are imparted to the delivery tension on the respective fibers 2 at the time of forming the ribbon and the No. 6 fiber (central coated fiber) is previously elongated in accordance with the calculated value with respect to the No. 1 fiber, by which the ribbon is formed in the state of applying the long optical path length thereto. The same holds true for the other optical fibers, such as the No. 2 fiber and No. 3 fiber. The elongation differences of the fibers 2 by twisting of the coated fiber 1 are thus compensated.

2. 发明专利

JPH10246844A OPTICAL FIBER UNIT AND ITS MANUFACTURE 失效
公开(公告)号：JPH10246844A
公开(公告)日：1998-09-14
申请号：JP4827297
申请日：1997-03-03
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KAZUNAGA , ISHIDA KATSUYOSHI , OHASHI KEIJI , UKIYA NORITAKA , MOGI AKIO , MIYAMOTO SUEHIRO , HOKARI KAZUO , FURUKAWA SHINICHI
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To provide the optical fiber unit which has its coated optical fiber led out with good operability and its manufacture. SOLUTION: The optical fiber unit is constituted by providing more than one coated optical fiber 6 with an intermediate coating layer 7 which is made of resin and covers them together and providing an outermost layer 8 which is formed of foamed resin and has unevenness of air bubbles of the foamed resin on its surface onto the said coating layer 7, and recessed parts 8a in the surface of the outermost layer 8 which comes into contact with the intermediate coating layer 7 are filled with the resin constituting the intermediate coating layer 7.

3. 发明专利

JPH10239572A PNEUMATICALLY FORCE-FED OPTICAL FIBER UNIT 失效
公开(公告)号：JPH10239572A
公开(公告)日：1998-09-11
申请号：JP4826997
申请日：1997-03-03
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KAZUNAGA , ISHIDA KATSUYOSHI , OHASHI KEIJI , UKIYA NORITAKA , MOGI AKIO , HOKARI KAZUO , FURUKAWA SHINICHI
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To obtain an excellent light transmission characteristic, improve the side pressure resistance and obtain stable productivity, by making the Young's modulus of a specific surface layer part of an interposed body equal to or less than the Young's modulus of an outermost covering layer of an optical fiber. SOLUTION: Optical fibers 2 are longitudinally attached around an interposed body 1, and a foam polyethylene layer 3 is out thereon to cover. The interposed body 1 is formed by forming a surface layer part 5, made of polyethylene, on the surface of core material 4 formed of a steel wire. When side pressure is applied to an optical fiber unit from the outside, the cushioning foam polyethylene layer 3 absorbs stress to a certain extent, but when storing side pressure is applied, stress sometimes reaches the optical fibers 2 through the layer 3. Even in this case, however, since the surface layer part 65 of the interposed body 1 has a thickness of 10μm or more and Young's modulus lower than the Young's modulus of an outermost layer 6 of the optical fiber 2, external stress is diffused to the surface layer part 5 of the interposed body 1, and distortion of the optical fibers 2 is reduced. The damage of the optical fibers is therefore prevented, and the increases of light transmission loss is suppressed.

4. 发明专利

JPH11149027A PRODUCTION OF OPTICAL TAPE CORD 失效
公开(公告)号：JPH11149027A
公开(公告)日：1999-06-02
申请号：JP31554797
申请日：1997-11-17
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KAZUNAGA , ISHIDA KATSUYOSHI , OHASHI KEIJI , TACHIKURA MASAO , IZUMIDA CHIKASHI
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To simplify production stages and to provide an optical tape cord aligned in the arrays of optical fiber cords at the time of producing the multiple optical tape cord by paralleling plural pieces of the optical fiber cords having tension members 2 and having a rectangular shape in sectional shape and coating these optical fiber cords with taping layers, thereby integrating the optical fiber cords. SOLUTION: Plural optical fibers 1 and the plural tension members 2 are respectively lined up in parallel and are fed into a fiber cord coating die 11, where the respective optical fibers 1 and tension members 2 are coated with the coating layers, by which the fibers and wires are integrated and plural pieces of the optical fiber cords 5 are simultaneously manufactured. These optical fiber cords 5 are then fed into a taping coating die 15 while the shape and direction where extruded from the fiber cord coating die 11 are maintained, by which the optical fiber cords are coated with the taping layers.

5. 发明专利

JPH1152201A TAPE CORD STRUCTURE OF OPTICAL FIBER 失效
公开(公告)号：JPH1152201A
公开(公告)日：1999-02-26
申请号：JP21101897
申请日：1997-08-05
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KAZUNAGA , ISHIDA KATSUYOSHI , OHASHI KEIJI , TAKEMOTO HAJIME , TACHIKURA MASAO
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To provide a tape cord structure which achieves the higher density and smaller diameter of optical fibers and improves connectability, i.e., allows multifiber simultaneous connection. SOLUTION: This tape cord structure is formed by forming single-core optical fibers 15, 15,... and tensile members 17, 17,... arranged in the specific positions on the circumferences thereof as single-core fibers of one unit. Plural units of these single-core fibers 21, 21,... of one unit are arranged in parallel on the same plane and are simultaneously coated with a coating material. At this time, notches 31 which is the base point dividing the respective single-core fibers 21 to each fiber are formed at either of at least the front surface or rear surface of the coating layers 23 coated by the coating material.

6. 发明专利

JPH10239574A OPTICAL FIBER UNIT 失效
公开(公告)号：JPH10239574A
公开(公告)日：1998-09-11
申请号：JP4827197
申请日：1997-03-03
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI KAZUNAGA , ISHIDA KATSUYOSHI , OHASHI KEIJI , UKIYA NORITAKA , MOGI AKIO , MIYAMOTO SUEHIRO , HOKARI KAZUO , FURUKAWA SHINICHI
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber unit having good operability for the pick finding of an coated optical fiber. SOLUTION: This optical fiber unit is provided with one or more intermediate cover layers 7 covering one or more cathode optical fibers 6 in the lump on then, and it is provided with an outermost layer 8 on the intermediate cover layer 7. The adhesive force of the contact faces between the coated optical fiber outermost layers 5 of the coated optical fibers 6 and the intermediate cover layer 7 kept in contact with the coated optical fiber outermost layers 5 is set to 10g/cm or below at the 90 deg.T peel strength. The adhesive force of the contact face between the outermost layer 8 and the intermediate cover layer 7 kept in contact with the outermost layer 8 is set to 30g/cm or above at the 90 deg.T peel strength.

7. 发明专利

JPH10197771A OPTICAL FIBER UNIT FOR FEEDING BY HIGH-VELOCITY AIR 失效
公开(公告)号：JPH10197771A
公开(公告)日：1998-07-31
申请号：JP1317597
申请日：1997-01-10
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： UKIYA NORITAKA , ISHIDA KATSUYOSHI , KOBAYASHI KAZUNAGA , MOGI AKIO , MIYAMOTO SUEHIRO , HOKARI KAZUO , FURUKAWA SHINICHI
IPC分类号： G02B6/44 , G02B6/46
摘要： PROBLEM TO BE SOLVED: To make it possible to simple and easily execute leading-out operation with bare hands by providing the inside surface of a coating layer with thin part coating layers formed by the recessed parts in opposite positions. SOLUTION: This optical fiber unit 1 is formed by coating two pieces of coated optical fibers 2, 2 with the foamed polyethylene coating layer 3 having a circular section. The inside surface of the coating layer 3 is provided with the two U-shaped grooves 4. The width (d) of these U-shaped grooves 4 is smaller than the diameter of the coated optical fibers 2 and, therefore, the meandering of the coated optical fibers 2 in the coating layer 3 is prevented by these U-shaped grooves. The U-shaped grooves 4 are disposed alongside the coated optical fibers 2 in this case and if these parts are pushed in an X-X direction, the coating layer collapse in the X-X direction while the coated optical fibers 2 are party pushed into the U-shaped grooves 4. When the coating layer collapse in the X-X direction, the coating layer inflates in the Y-Y transverse direction as shown by broken lines and, therefore, these inflating parts may be gripped and may be pulled in the Y-Y direction, by which the coating layer is torn from the thin parts by the U-shaped grooves 4, 4.

8. 发明专利

JPH10167769A PRODUCTION OF OPTICAL FIBER-FEEDING UNIT AND COATING DEVICE 失效
公开(公告)号：JPH10167769A
公开(公告)日：1998-06-23
申请号：JP32033296
申请日：1996-11-29
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： ISHIDA KATSUYOSHI , KOBAYASHI KAZUNAGA , OHASHI KEIJI , HOKARI KAZUO , FURUKAWA SHINICHI
IPC分类号： G02B6/44 , C03C25/10 , C03C25/12 , C03C25/02
摘要： PROBLEM TO BE SOLVED: To provide the production process and a resin coater that can produce optical fiber-feeding unit that is excellent in its appearance and can easily do pick finding, as the resin can be readily removed at its terminal. SOLUTION: The resin coater for making the optical fiber-feeding unit is equipped with at least the wire line-separation part 12, line-coating part 13 and line-collecting part 14. The line-separating part 12 guides a plurality of the separated optical fiber element lines to the coating part 13 in the separated state. The coating part coats the separated fiber element lines 2 with a resin and the line-collecting part 14 collects a plurality of the resin-coated optical fiber element lines so that they come into substantial contact with each other to form the core.

9. 发明专利

JPH11149021A OPTICAL FIBER CORD AND OPTICAL CORD TAPE USING THE CORD 失效
公开(公告)号：JPH11149021A
公开(公告)日：1999-06-02
申请号：JP31751597
申请日：1997-11-18
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： INO ETSUO , SHIMOMICHI TAKESHI , KOBAYASHI KAZUNAGA , ISHIDA KATSUYOSHI , OHASHI KEIJI , TACHIKURA MASAO , TAKEMOTO HAJIME
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To easily manufacture an optical cord tape from optical fiber cords by specifying the radius of curvature of a high-tensile wire as the high-tensile wire of the cord tape to eliminate the generation of meandering caused by the meandering of the metallic high-tensile wires. SOLUTION: Relating to an optical fiber cord 5, metallic high-tensile wires 2... whose radiuses of curvature of meandering are >=200 mm are used. When wires are originally wires whose radiuses of curvature of meandering are >=200 mm, they may be used as high-tensile wires radiuses of curvature of meandering are >=200 mm as they are. Moreover, when wires are wires whose radiuses of curvature of meandering are =200 mm, or are made preferably >=400 mm may be used. in the case of such an optical fiber code 5, since wires whose meandering are small are used as its high-tensile wires 2, it is hardly generated that the meandering appears in the optical fiber code 5.

10. 发明专利

JPH10246843A IDENTIFICATION CODE OF OPTICAL FIBER, AND OPTICAL FIBER PRINTED WITH IDENTIFICATION CODE 失效
公开(公告)号：JPH10246843A
公开(公告)日：1998-09-14
申请号：JP6390297
申请日：1997-03-04
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： ISHIDA KATSUYOSHI , KOBAYASHI KAZUNAGA , OHASHI KEIJI , HOKARI KAZUO , FURUKAWA SHINICHI
IPC分类号： G02B6/44
摘要： PROBLEM TO BE SOLVED: To clearly print an identification code on an optical fiber by a dot printer, to facilitate and to make exact the visual identification of code under the circumstance of discoloring of the coat of the optical fiber and insufficient illumination by making the identification code the combination of bar length with the length of interval between bars. SOLUTION: The combination of the length of a bar 1 with the length of interval 2 of an optical fiber is represented as No.1-No.3 by making the lengths of bars 1; L, 2L and 3L with the basic unit S of the length of interval, as No.4 and No.5 by making the lengths of intervals 2; 2S, 4S with the basic unit L of the bar length, as No.6 and No.7 by making bar length 2L and the lengths of intervals 2S, 4S and as No.8-No.10 by making bar length 8L and the length intervals S, 2S and 4S. Consequently, by making the length of the bar 1, the length of interval 2 the multiple of integer of the basic units L, S, the visual identification of the difference of lengths becomes easy.

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