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公开(公告)号：US10007079B2
公开(公告)日：2018-06-26
申请号：US15571103
申请日：2016-03-09
Applicant: FUJIKURA LTD.
Inventor： Daiki Takeda , Naoki Okada , Masayoshi Yamanaka , Ken Osato , Tomoaki Kaji
IPC: G02B6/44
CPC classification number: G02B6/4413 , G02B6/44 , G02B6/4401
Abstract: An optical fiber unit includes: an optical fiber bundle formed by bundling a plurality of optical fibers; and a plurality of bundling members. Each of the bundling members is wound on an outer circumference of the optical fiber bundle along a length direction of the optical fiber bundle while a winding direction of the bundling member is reversed alternately, and joined with another bundling member at reverse sections where the winding direction of the bundling member is reversed. A region surrounded by a pair of the bundling members to be joined at the reverse sections includes a joining point at one of the reverse sections of another pair of the bundling members.
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公开(公告)号：US09618717B2
公开(公告)日：2017-04-11
申请号：US14915657
申请日：2014-10-01
Applicant: FUJIKURA LTD.
Inventor： Naoto Ito , Masayuki Ishioka , Kouji Tomikawa , Ken Osato , Masayoshi Yamanaka , Naoki Okada
CPC classification number: G02B6/4413 , G02B6/4403 , G02B6/4405 , G02B6/4407 , G02B6/46
Abstract: An objective of the disclosure is to improve workability in extracting optical fibers in an optical fiber unit in which a bundle of optical fibers is bundled by bundling members, and to suppress/prevent an increase in transmission loss even when tension is applied to the bundling members. This optical fiber unit includes: a plurality of optical fibers; and at least three bundling members that bundle the optical fibers into a bundle. A first bundling member, among the plurality of bundling members, is arranged along a length direction of the bundle of optical fibers so as to be wound on an outer circumference of the bundle of optical fibers. The first bundling member is joined with a second bundling member at a contact point where the first bundling member contacts the second bundling member, and is joined with a third bundling member, which is different from the second bundling member, at a contact point where the first bundling member contacts the third bundling member. The first bundling member's winding direction with respect to the bundle of optical fibers is reversed at the contact point with the second bundling member and at the contact point with the third bundling member.
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公开(公告)号：US09261664B2
公开(公告)日：2016-02-16
申请号：US14453088
申请日：2014-08-06
Applicant: FUJIKURA LTD.
Inventor： Kouji Tomikawa , Naoki Okada , Daiki Takeda , Masayoshi Yamanaka
CPC classification number: G02B6/443 , G02B6/4494 , H01B7/288
Abstract: There is provided an optical fiber cable having a configuration in which a strand core of optical fibers is housed in a sheath and capable of fulfilling sufficient mechanical characteristics and ensuring a predetermined watertight property. The optical fiber cable includes a strand core 1 including a plurality of optical fiber strands 11 and watertight material strings 12, a tape body 2 covering the strand core 1, and a cylindrical sheath 5 covering the strand core 1 and the tape body 2, wherein the tape body 2 has water permeability, and the watertight material strings 12 are dissolved in water when the water permeates through the tape body 2, and the dissolved watertight material passes through the tape body 2 and flows into the sheath 5.
Abstract translation: 提供了一种光纤电缆，其具有将光纤的绞线芯容纳在护套中并且能够实现足够的机械特性并确保预定的防水性能的构造。 光纤电缆包括：包含多个光纤线束11和水密材料串12的线束芯1，覆盖绞线芯1的带体2和覆盖绞线芯1和带体2的圆筒状护套5，其中 带体2具有透水性，并且当水渗入带体2时，水密材料柱12溶解在水中，并且溶解的水密材料通过带体2并流入护套5。
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公开(公告)号：US10345516B2
公开(公告)日：2019-07-09
申请号：US15301995
申请日：2015-04-28
Applicant: FUJIKURA LTD. , NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yoshie Sajima , Kouji Tomikawa , Ken Osato , Masayoshi Yamanaka , Naoki Okada , Shinya Hamaguchi , Naoki Nakagawa , Yusuke Yamada , Hisaaki Nakane
Abstract: [Object] In an optical fiber cable including a plurality of optical fiber units each formed by tying optical fibers in a bundle, preferable water resistance is to be achieved without increasing an outer diameter of the optical fiber cable.[Solution] An optical fiber cable includes: a plurality of optical fiber units each including a plurality of optical fibers and a bundling member wound around an outer periphery of a bundle of the plurality of optical fibers, the bundling member having a surface to which a water-absorbent granular substance is detachably attached.
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公开(公告)号：US20190121042A1
公开(公告)日：2019-04-25
申请号：US16092952
申请日：2017-02-15
Applicant: FUJIKURA LTD.
Inventor： Naoto Ito , Ken Osato , Masayoshi Yamanaka
IPC: G02B6/44
Abstract: An optical fiber unit includes: an optical fiber bundle formed by bundling a plurality of optical fibers; and a plurality of bundling members. One bundling member of the plurality of bundling members is wound on an outer circumference of the optical fiber bundle in a length direction of the optical fiber bundle, while reversing a winding direction alternately, and is joined to another bundling member at a section where the winding direction is reversed. A ratio of a width of a cross-section of the bundling member to a thickness of the cross-section of the bundling member is smaller than 20.
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Patent Agency Ranking
公开(公告)号：US10409022B2
公开(公告)日：2019-09-10
申请号：US15305247
申请日：2016-03-09
Applicant: FUJIKURA LTD.
Inventor： Tomoaki Kaji , Masataka Mikami , Masayuki Ishioka , Ken Osato , Masayoshi Yamanaka , Naoki Okada
IPC: G02B6/44
Abstract: A method for producing an optical fiber unit by winding at least two bundling members on the outer circumference of an optical fiber bundle formed by bundling a plurality of optical fibers, including: feeding the optical fiber bundle from a fiber passage member; feeding the bundling members while forming intersection points between two of the bundling members on the outer circumference of the optical fiber bundle by feeding at least one of the bundling members from a bundling member passage part of a rotating member arranged to the outer circumference of the fiber passage member, while causing the rotating member to oscillate, with the feeding direction serving as the axis; and fusion-bonding the bundling members at their intersection points.
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公开(公告)号：US10151898B2
公开(公告)日：2018-12-11
申请号：US15037840
申请日：2014-03-24
Applicant: FUJIKURA LTD.
Inventor： Tomoaki Kaji , Daiki Takeda , Satoru Shiobara , Masayoshi Yamanaka
IPC: G02B6/44 , B29C63/02 , B29C63/10 , B29D11/00 , B29C53/72 , B29C53/58 , B29C63/08 , H01B13/26 , B29L11/00
Abstract: A former including: a guide pipe guiding an optical fiber bundle; a tape forming section forming a press-wrapping tape from a strip shape into a helical shape, while guiding the press-wrapping tape along a feed direction, the tape forming section including a curved section gradually curving the strip shaped press-wrapping tape while guiding the press-wrapping tape along the feed direction, and a helical section that is a helical tube shaped location further to a downstream side than a position where two edges of the curved section intersect with each other, the helical section causing two end portions of the press-wrapping tape that has been curved with the curved section to overlap and forming the press-wrapping tape into a helical shape, while guiding the press-wrapping tape along the feed direction, and gradually narrowing an external diameter of the helical shaped press-wrapping tape.
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公开(公告)号：US10114186B2
公开(公告)日：2018-10-30
申请号：US15511369
申请日：2016-08-12
Applicant: Fujikura Ltd.
Inventor： Naoto Ito , Ken Osato , Masayoshi Yamanaka , Naoki Okada
IPC: G02B6/44
Abstract: An optical fiber cable includes a core including a plurality of units which are assembled and each of which comprises a plurality of optical fibers which are assembled, a pair of tension members disposed so as to face each other with the core interposed therebetween, and a sheath covering the core and the pair of tension members collectively. The units are twisted so as to form a plurality of layers. The plurality of layers includes a first layer having first-layer units formed in an SZ-twisted shape and a second layer having second-layer units formed in an SZ-twisted shape. A twisting direction of the first-layer units is opposite to a twisting direction of the second-layer units in at least a portion in a cable length direction.
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9.发明授权公开(公告)号：US10078194B2
公开(公告)日：2018-09-18
申请号：US15033969
申请日：2015-10-27
Applicant: FUJIKURA LTD.
Inventor： Yoshie Sajima , Mizuki Isaji , Ken Osato , Masayoshi Yamanaka
CPC classification number: G02B6/448 , B29D11/00721 , B29D11/00951 , G01M11/088
Abstract: [Objective] To detect abnormalities in optical fibers by using a phenomenon specific to optical fiber tapes including plural optical fibers arranged parallel to each other and connected together intermittently. [Solution] This optical fiber tape manufacturing method involves: a step of forming connecting parts that connect together adjacent optical fibers among a plurality of optical fibers arranged parallel to each other while applying tension to the optical fibers, and thus forming an optical fiber tape in which the connecting parts are intermittently disposed; a step of reducing the tension applied to the optical fiber tape; and a step of measuring a thickness of the optical fiber tape with reduced tension from a direction parallel to a tape plane on a path of the optical fiber tape.
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公开(公告)号：US20180136423A1
公开(公告)日：2018-05-17
申请号：US15571103
申请日：2016-03-09
Applicant: FUJIKURA LTD.
Inventor： Daiki Takeda , Naoki Okada , Masayoshi Yamanaka , Ken Osato , Tomoaki Kaji
IPC: G02B6/44
CPC classification number: G02B6/4413 , G02B6/44 , G02B6/4401
Abstract: An optical fiber unit includes: an optical fiber bundle formed by bundling a plurality of optical fibers; and a plurality of bundling members. Each of the bundling members is wound on an outer circumference of the optical fiber bundle along a length direction of the optical fiber bundle while a winding direction of the bundling member is reversed alternately, and joined with another bundling member at reverse sections where the winding direction of the bundling member is reversed. A region surrounded by a pair of the bundling members to be joined at the reverse sections includes a joining point at one of the reverse sections of another pair of the bundling members.
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