公开(公告)号：US09008478B2

公开(公告)日：2015-04-14

申请号：US13644939

申请日：2012-10-04

Applicant: Fujikura Ltd.

Inventor： Takashi Matsuzawa ,  Yukiko Take ,  Mizuki Isaji ,  Ken Osato ,  Naoki Okada

IPC: G02B6/44 ,  G02B6/04

CPC classification number: G02B6/4482 ,  G02B6/4403 ,  G02B6/4411

Abstract: An optical fiber ribbon includes: a plurality of optical fibers arranged in parallel; and a tape material covering the plurality of optical fibers into a tape, in which the plurality of optical fibers are coated respectively with translucent color layers of different colors, and in at least two of the plurality of optical fibers, markings for identifying the optical fiber ribbon are provided at a same position in a longitudinal direction of the optical fiber ribbon.

Abstract translation: 光纤带包括：平行布置的多根光纤; 以及将所述多根光纤覆盖成带状的带状材料，其中所述多根光纤分别涂覆有不同颜色的半透明色层，并且在所述多根光纤中的至少两根中，用于识别所述光纤的标记 带状物设置在光纤带的纵向方向上的相同位置处。

公开(公告)号：US20210191061A1

公开(公告)日：2021-06-24

申请号：US16078586

申请日：2016-11-08

Applicant: FUJIKURA LTD.

Inventor： Mizuki Isaji ,  Soichiro Kaneko ,  Ken Osato

IPC: G02B6/44 ,  C03C25/1065 ,  C03C25/326

Abstract: A method for manufacturing an optical fiber ribbon includes: forming a colored layer on to each of a plurality of optical fibers and forming an optical fiber ribbon by curing a connecting material applied to a surface of the colored layer of each of the optical fibers to form connection parts that connect adjacent ones of the optical fibers. Forming the colored layer further includes: applying a coloring agent to the optical fibers and curing the coloring agent such that uncured resin remains on the surface of the colored layer. Forming the optical fiber ribbon further includes: applying the connecting material to the surface with the uncured resin and curing the connecting material and the uncured resin on the surface of the colored layer.

公开(公告)号：US11002928B2

公开(公告)日：2021-05-11

申请号：US16312669

申请日：2017-07-31

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Mizuki Isaji ,  Masatoshi Ohno ,  Shinnosuke Sato ,  Kouji Tomikawa ,  Akira Namazue ,  Ken Osato ,  Naoki Nakagawa ,  Yuji Aoyagi ,  Shigekatsu Tetsutani

IPC: G02B6/44

Abstract: An optical fiber cable includes: a core comprising gathered optical fibers; an inner sheath housing the core; a wire body embedded in the inner sheath; tension members embedded in the inner sheath, wherein the core is interposed between the tension members; a reinforcing sheet that covers the inner sheath; and an outer sheath that covers the reinforcing sheet, wherein in the inner sheath, ti

公开(公告)号：US10775581B2

公开(公告)日：2020-09-15

申请号：US16465628

申请日：2017-11-15

Applicant: FUJIKURA LTD.

Inventor： Shinnosuke Sato ,  Mizuki Isaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44

Abstract: An optical cable includes: an optical fiber unit where a plurality of optical fibers are wrapped with a wrapping tape; at least three tensile strength members disposed in parallel with and on an outer side of the optical fiber unit at intervals in a circumferential direction; and a sheath that coats the optical fiber unit and the tensile strength members and that is disposed between the optical fiber unit and the tensile strength members. An inner wall surface of the sheath formed between the optical fiber unit and the tensile strength members protrudes toward a cable center in comparison with an inner wall surface of the sheath where none of the tensile strength members are disposed. A portion of the wrapping tape disposed on the inner wall surface that protrudes toward the cable center is depressed toward the cable center.

公开(公告)号：US10705305B2

公开(公告)日：2020-07-07

申请号：US16334046

申请日：2017-09-08

Applicant: FUJIKURA LTD.

Inventor： Soichiro Kaneko ,  Tomoaki Kaji ,  Mizuki Isaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44 ,  G02B6/04

Abstract: An optical fiber unit includes: a plurality of optical fibers; and at least two binding materials that bind the plurality of optical fibers. The two binding materials are wound around the plurality of optical fibers in an SZ shape and adhered to each other at reversed portions of the SZ shape to form an adhesive part. The adhesive part extends along a longitudinal direction where the optical fiber unit extends, and 0.15≤L/(P/2)≤0.8 is satisfied where L is a length of the adhesive part in the longitudinal direction and P is a binding pitch of the two binding materials in the longitudinal direction.

公开(公告)号：US10634863B2

公开(公告)日：2020-04-28

申请号：US16326097

申请日：2017-09-11

Applicant: FUJIKURA LTD.

Inventor： Tomoaki Kaji ,  Soichiro Kaneko ,  Mizuki Isaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44 ,  G02B6/04

Abstract: An optical fiber unit includes a plurality of optical fibers; and two binding materials that bind the optical fibers. The two binding materials are wound around the optical fibers in an SZ shape, and are adhered to each other at respective reversed portions that form an adhesive part. The adhesive part has a plurality of intersection points of center lines of the two binding materials.

公开(公告)号：US20200026013A1

公开(公告)日：2020-01-23

申请号：US16337873

申请日：2017-09-28

Applicant: FUJIKURA LTD.

Inventor： Akira Murata ,  Mizuki Isaji ,  Tomoaki Kaji ,  Yoshie Sajima

IPC: G02B6/44 ,  C03C25/1065

Abstract: An optical fiber ribbon is formed by connecting a plurality of optical fiber colored core wires to each other with a connector formed of a UV curable resin. Each of the optical fiber colored core wires includes: a bare optical fiber; a primary layer that comprises a UV curable resin that covers the bare optical fiber; a secondary layer that comprises a UV curable resin that covers the primary layer; and a colored layer disposed outside the secondary layer and that comprises a colored UV curable resin. The primary layer has a Young's modulus that is greater than or equal to 75% of a saturated Young's modulus of the primary layer.

公开(公告)号：US20200026012A1

公开(公告)日：2020-01-23

申请号：US16337858

申请日：2017-09-28

Applicant: FUJIKURA LTD.

Inventor： Akira Murata ,  Yoshie Sajima ,  Mizuki Isaji ,  Tomoaki Kaji

IPC: G02B6/44

Abstract: An optical fiber colored core wire includes: a bare optical fiber; a primary layer that comprises a UV curable resin that covers the bare optical fiber; a secondary layer that comprises a UV curable resin that covers the primary layer; and a colored layer disposed outside the secondary layer and that comprises a colored UV curable resin. The primary layer has a Young's modulus that is greater than or equal to 70% of a saturated Young's modulus of the primary layer.

公开(公告)号：US20190339160A1

公开(公告)日：2019-11-07

申请号：US16324497

申请日：2017-08-07

Applicant: FUJIKURA LTD.

Inventor： Yuki Nemoto ,  Shengyang Luo ,  Masanobu Higuchi ,  Tatsushi Ogasawara ,  Mizuki Isaji ,  Tomoaki Kaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G01M11/08 ,  G02B6/44 ,  G01B11/02

Abstract: An inspection device of an optical fiber unit, including a plurality of binding materials wound in an SZ shape on a plurality of optical fibers, includes: a measurement sensor that measures a width of the optical fiber units in a first direction orthogonal to a longitudinal direction in which the optical fiber unit extends; and a determination circuit that determines a presence or an absence of an abnormality in a binding state, based on a measurement result of the measurement sensor.

公开(公告)号：US20190310437A1

公开(公告)日：2019-10-10

申请号：US16465628

申请日：2017-11-15

Applicant: FUJIKURA LTD.

Inventor： Shinnosuke Sato ,  Mizuki Isaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44

Abstract: An optical cable includes: an optical fiber unit where a plurality of optical fibers are wrapped with a wrapping tape; at least three tensile strength members disposed in parallel with and on an outer side of the optical fiber unit at intervals in a circumferential direction; and a sheath that coats the optical fiber unit and the tensile strength members and that is disposed between the optical fiber unit and the tensile strength members. An inner wall surface of the sheath formed between the optical fiber unit and the tensile strength members protrudes toward a cable center in comparison with an inner wall surface of the sheath where none of the tensile strength members are disposed. A portion of the wrapping tape disposed on the inner wall surface that protrudes toward the cable center is depressed toward the cable center.