公开(公告)号：US10345545B2

公开(公告)日：2019-07-09

申请号：US15823798

申请日：2017-11-28

Applicant: FUJIKURA LTD.

Inventor： Tomoaki Kaji ,  Masatoshi Ohno ,  Daiki Takeda ,  Ken Osato ,  Masayoshi Yamanaka ,  Naoki Okada

IPC: G02B6/44

Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.

公开(公告)号：US10139583B2

公开(公告)日：2018-11-27

申请号：US15567793

申请日：2016-09-02

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Daiki Takeda ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes: a cable main body including a core that includes optical fibers, at least a pair of tension members that face each other with the core interposed therebetween, and an inner sheath that covers the core and the tension members; a cylindrical outer sheath that accommodates the cable main body; a reinforcing sheet provided between the cable main body and the outer sheath; and a rip cord provided between the reinforcing sheet and the cable main body. The reinforcing sheet surrounds an entire circumference of the cable main body, the reinforcing sheet includes an overlapping portion in which portions of the reinforcing sheet overlap each other in a portion in a circumferential direction of the cable main body, and the reinforcing sheet is formed of a metal.

公开(公告)号：US09869838B2

公开(公告)日：2018-01-16

申请号：US14951750

申请日：2015-11-25

Applicant: FUJIKURA, LTD.

Inventor： Tomoaki Kaji ,  Masatoshi Ohno ,  Daiki Takeda ,  Ken Osato ,  Masayoshi Yamanaka ,  Naoki Okada

IPC: G02B6/44

CPC classification number: G02B6/4433 ,  G02B6/4405 ,  G02B6/4413 ,  G02B6/4495

Abstract: An optical fiber cable is provided. The cable includes: an optical fiber core having a central axis; a presser winding covering the optical fiber core; a sheath covering the presser winding; two tension members in the sheath and facing each other with the central axis therebetween; and two rip cords facing each other with the central axis therebetween and being in direct contact with the sheath and the presser winding. The optical fiber core includes a plurality of optical fiber tapes arranged around the central axis and having mutually different stripe ring marks applied thereon. Each optical fiber tapes includes a plurality of optical fibers intermittently adhered to each other.

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.

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.

公开(公告)号：US10359581B2

公开(公告)日：2019-07-23

申请号：US16125937

申请日：2018-09-10

Applicant: FUJIKURA LTD.

Inventor： Daiki Takeda ,  Shigeo Takahashi

IPC: G02B6/38

Abstract: A clamp member includes: a body part that includes a fiber insertion hole where an optical fiber is inserted and a hole for tension member where a tension member is inserted; and an anchoring screw that fixes the tension member to the body part. The clamp member is fixed to an end of an optical cable that includes the optical fiber and the tension member, and the clamp member is fixed to and housed in an outer housing of an optical connector.

公开(公告)号：US20180106977A1

公开(公告)日：2018-04-19

申请号：US15567793

申请日：2016-09-02

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Daiki Takeda ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/4495 ,  G02B6/44 ,  G02B6/4433 ,  G02B6/4435

Abstract: An optical fiber cable includes: a cable main body including a core that includes optical fibers, at least a pair of tension members that face each other with the core interposed therebetween, and an inner sheath that covers the core and the tension members; a cylindrical outer sheath that accommodates the cable main body; a reinforcing sheet provided between the cable main body and the outer sheath; and a rip cord provided between the reinforcing sheet and the cable main body. The reinforcing sheet surrounds an entire circumference of the cable main body, the reinforcing sheet includes an overlapping portion in which portions of the reinforcing sheet overlap each other in a portion in a circumferential direction of the cable main body, and the reinforcing sheet is formed of a metal.

公开(公告)号：US20250164733A1

公开(公告)日：2025-05-22

申请号：US18691772

申请日：2022-09-01

Applicant: Fujikura Ltd.

Inventor： Daiki Takeda ,  Ken Osato ,  Ryo Kuramitsu

IPC: G02B6/44 ,  G02B6/02 ,  G02B6/46

Abstract: An optical fiber cable includes: a multi-core optical fiber including a cladding and cores in the cladding; and a piece of arrangement information associated with the multi-core optical fiber and with a core arrangement of the cores in a cross-section of the multi-core optical fiber.

公开(公告)号：US20240053559A1

公开(公告)日：2024-02-15

申请号：US18264927

申请日：2022-04-27

Applicant: Fujikura Ltd.

Inventor： Shinnosuke Sato ,  Daisuke Hikima ,  Daiki Takeda ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/443

Abstract: An optical cable includes an optical fiber, an outer sheath that houses the optical fiber, and a tubular reinforcement sheet disposed between the optical fiber and the outer sheath. In a cross section perpendicular to a length direction of the optical cable, an adhesive strength between the tubular reinforcement sheet and the outer sheath in a first zone is stronger than an adhesive strength between the tubular reinforcement sheet and the outer sheath in a second zone.

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.