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    OPTICAL FIBER CABLE
    2.
    发明专利
    OPTICAL FIBER CABLE 失效

    公开(公告)号：JPH08262291A

    公开(公告)日：1996-10-11

    申请号：JP6078595

    申请日：1995-03-20

    Applicant: SUMITOMO ELECTRIC INDUSTRIES ,  NIPPON TELEGRAPH & TELEPHONE

    Inventor： ISHIKAWA HIROKI ,  SANO HIROAKI ,  TANAKA SHIGERU ,  NIRASAWA NOBUMASA ,  MORITA KENJI ,  KAWADA OSAMU ,  HOKARI KAZUO

    IPC: G02B6/44

    Abstract: PURPOSE: To make it possible to take out desired coated optical fibers without allowing the other coated optical fibers to run out in the case an optical cable is branched in an intermediate part. CONSTITUTION: A spacer 1 has a tensile body 2 at its center and has plural grooves 3 of an S-Z slot type inverting in inscribing directions at a specified period on its circumference. The coated optical fibers 4 are housed in the respective grooves 3. The spacer 1 has adhesives 6 along the grooves in at least a part between the grooves on its outer peripheral surface. Wire-shaped bodies 5 are spirally wound apart spacings around the spacer 1 and are adhered thereto. The wire-shaped bodies 5a retaining the coated optical fibers 4a to be taken out are cut in the upper part of the grooves 3a, by which the taking out of the desired coated optical fibers 4a is made possible.

    PRODUCTION OF SELF-SUPPORTING TYPE OPTICAL CABLE
    5.
    发明专利
    PRODUCTION OF SELF-SUPPORTING TYPE OPTICAL CABLE 失效

    公开(公告)号：JPH08211267A

    公开(公告)日：1996-08-20

    申请号：JP1578695

    申请日：1995-02-02

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ISHIKAWA HIROKI ,  SANO HIROAKI ,  TANAKA SHIGERU ,  NIRASAWA NOBUMASA ,  MORITA KENJI ,  OTA JUNICHI

    IPC: G02B6/44

    Abstract: PURPOSE: To provide a process for producing a self-supporting type optical cable which increases a wire speed when applying with a common sheath and improves productivity. CONSTITUTION: Supporting wires 3 and an optical cable ore 4 are covered and integrated with the common sheath 5 continuous in a longitudinal direction. Since the length in the vertical direction of a neck part 5a changes periodically in the longitudinal direction of the self-supporting type optical cable, the optical cable core 4 has a extra length with the supporting wires 3 in a tensionless state. The part of the neck part 5a is easily deformed and the distance between both is changed in the state of applying tension on the supporting wires 3 and, therefore, the generation of elongation and distortion on the optical cable core 4 and the application of a compressive stress thereon do not arise. Then, the coated optical fibers 6 are prevented from elongating and meandering within the slots of the optical cable core 4 regardless of before or after the tension application.

    SELF-SUPPORTING TYPE OPTICAL CABLE
    7.
    发明专利
    SELF-SUPPORTING TYPE OPTICAL CABLE 失效

    公开(公告)号：JPH08304676A

    公开(公告)日：1996-11-22

    申请号：JP11050995

    申请日：1995-05-09

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ISHIKAWA HIROKI ,  SANO HIROAKI ,  TANAKA SHIGERU ,  NIRASAWA NOBUMASA ,  MORITA KENJI ,  OTA JUNICHI

    IPC: G02B6/44

    Abstract: PURPOSE: To provide a self-supporting type optical cable which prevents the elongation and increase in transmission loss of coated optical fibers. CONSTITUTION: Supporting wires 3 and an optical cable core 4 are covered and integrated with a common sheath 5 continuous in a longitudinal direction. The length in the longitudinal direction of a neck part 5a changes periodically in the longitudinal direction of the self-supporting type optical cable and, therefore, the optical cable core 4 has an extra length to the supporting wires 3 in a tensionless state. The part of the neck part 5a is easily deformed and the distance between the cable core and the supporting wires 3 changes in the state of applying the tension on these wires and, therefore, the occurrence of elongation and distortion in the optical cable core 4 and the application of a compressive stress thereon do not arise. Then, the coated optical fibers 6 do not elongate and meander within the slots of the optical cable core 4 regardless of before or after the impression of the tension.

    MANUFACTURE OF SELF-SUPPORTING CABLE
    8.
    发明专利
    MANUFACTURE OF SELF-SUPPORTING CABLE 失效

    公开(公告)号：JPH06119837A

    公开(公告)日：1994-04-28

    申请号：JP29385992

    申请日：1992-10-07

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： SASAGAWA MASAO ,  MORITA KENJI

    IPC: H01B7/18 ,  H01B13/24

    Abstract: PURPOSE:To shorten the length of a connection part to the irreducible minimum, and make the connection part and an opening part in a desired shape, forming the connection part intermittently, by integrally forming continuously a supporting wire, a cable main body, and the connecting part, and then forming an opening part. CONSTITUTION:A high-tensile strength wire 1 such as a steel wire and a cable lore 2 are led to the cross head 12 of an extruder 11 of thermoplastic resin in a parallelly arranged condition from a supply drum. Next, synthetic resin in a melted condition is batch-coated 3 on the wire 1 and the core 2 to integrally form a supporting wire 4, a cable main body 5, and a connection part 6 in the head 12, and then a resultant is cooled and solidified in a cooling tank 13. The part 6 is partially punched, that is, punched in a desired dimension by a punching machine 14 forming an opening part 7, and a self-supporting cable is obtained, which is in a desired cross section shape having the part 7 and in a 8-shaped cross section having the part 6 remained intermittently at length sufficiently short as required. Consequently, the dimension of the part 6 can be formed in the smallest dimension, in which connection strength is sufficient as required for bearing dead weight and wind pressure, and also the shape and dimension of the parts 6 and 7 can be made high accurately.

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