公开(公告)号：US11592634B2

公开(公告)日：2023-02-28

申请号：US17260792

申请日：2019-09-03

Applicant: Fujikura Ltd.

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

IPC: G02B6/44

Abstract: An optical fiber cable includes: optical fiber units each having optical fibers; a wrapping tube that wraps around the optical fiber units; a filling disposed inside the wrapping tube; and a sheath that covers the wrapping tube. The optical fiber units includes outer units that are disposed at an outermost layer of the optical fiber units. The outer units are twisted in an SZ shape around a cable central axis of the optical fiber cable. The filling is sandwiched between one of the outer units and the wrapping tube in a cross-sectional view.

公开(公告)号：US11262515B2

公开(公告)日：2022-03-01

申请号：US16340626

申请日：2017-11-17

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Shinnosuke Sato ,  Mizuki Isaji ,  Kouji Tomikawa ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes a core that includes an assembled plurality of optical fibers; an inner sheath that accommodates the core therein, a pair of tension members that are embedded in the inner sheath and that are disposed on opposite sides of the core, and an outer sheath that covers the inner sheath. The inner sheath is formed with a dividing portion that divides an inner peripheral surface and an outer peripheral surface of the inner sheath in a circumferential direction. The dividing portion extends along a longitudinal direction in which the optical fiber cable extends.

公开(公告)号：US20210271042A1

公开(公告)日：2021-09-02

申请号：US17260792

申请日：2019-09-03

Applicant: Fujikura Ltd.

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

IPC: G02B6/44

Abstract: An optical fiber cable includes: optical fiber units each having optical fibers; a wrapping tube that wraps around the optical fiber units; a filling disposed inside the wrapping tube; and a sheath that covers the wrapping tube. The optical fiber units includes outer units that are disposed at an outermost layer of the optical fiber units. The outer units are twisted in an SZ shape around a cable central axis of the optical fiber cable. The filling is sandwiched between one of the outer units and the wrapping tube in a cross-sectional view.

公开(公告)号：US20210141178A1

公开(公告)日：2021-05-13

申请号：US16612199

申请日：2018-12-05

Applicant: Fujikura Ltd.

Inventor： Tomoaki Kaji ,  Shinnosuke Sato ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes: a first aggregate layer including first optical fiber units that are helically twisted together in a first direction without strand-back. Each of the first optical fiber units includes optical fibers twisted together in a second direction. The first direction is different from the second direction.

公开(公告)号：US20200003979A1

公开(公告)日：2020-01-02

申请号：US16490168

申请日：2018-03-15

Applicant: FUJIKURA LTD.

Inventor： Shinnosuke Sato ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44 ,  B29D11/00

Abstract: An optical fiber cable manufacturing method using a manufacturing apparatus including an SZ twisting device, an extrusion molding device, and a pressing portion disposed between the SZ twisting device and the extrusion molding device is provided. The method including: twisting optical fibers or optical fiber units in an SZ manner using the SZ twisting device to form an optical fiber bundle; and covering the optical fiber bundle with a sheath using the extrusion molding device while pressing the optical fiber bundle using the pressing portion.

公开(公告)号：US20240288646A1

公开(公告)日：2024-08-29

申请号：US18569834

申请日：2022-03-08

Applicant: Fujikura Ltd.

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

IPC: G02B6/44

CPC classification number: G02B6/4431 ,  G02B6/4432 ,  G02B6/4479

Abstract: An optical fiber cable includes a core including optical fibers and a wrapping member that wraps the optical fibers, a sheath housing the core, and a rip cord disposed between the core and the sheath. A recessed portion is recessed inward in a radial direction of the core in the wrapping member. At least a portion of the rip cord is disposed inside the recessed portion.

公开(公告)号：US11199676B2

公开(公告)日：2021-12-14

申请号：US16490168

申请日：2018-03-15

Applicant: FUJIKURA LTD.

Inventor： Shinnosuke Sato ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44 ,  B29D11/00

Abstract: An optical fiber cable manufacturing method using a manufacturing apparatus including an SZ twisting device, an extrusion molding device, and a pressing portion disposed between the SZ twisting device and the extrusion molding device is provided. The method including: twisting optical fibers or optical fiber units in an SZ manner using the SZ twisting device to form an optical fiber bundle; and covering the optical fiber bundle with a sheath using the extrusion molding device while pressing the optical fiber bundle using the pressing portion.

公开(公告)号：US20210278616A1

公开(公告)日：2021-09-09

申请号：US16340626

申请日：2017-11-17

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Shinnosuke Sato ,  Mizuki Isaji ,  Kouji Tomikawa ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes a core that includes an assembled plurality of optical fibers; an inner sheath that accommodates the core therein, a pair of tension members that are embedded in the inner sheath and that are disposed on opposite sides of the core, and an outer sheath that covers the inner sheath. The inner sheath is formed with a dividing portion that divides an inner peripheral surface and an outer peripheral surface of the inner sheath in a circumferential direction. The dividing portion extends along a longitudinal direction in which the optical fiber cable extends.

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：US20230161125A1

公开(公告)日：2023-05-25

申请号：US18156658

申请日：2023-01-19

Applicant: Fujikura Ltd.

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

IPC: G02B6/44

CPC classification number: G02B6/443 ,  G02B6/4434 ,  G02B6/449

Abstract: An optical fiber cable includes: optical fiber units each comprising optical fibers, and twisted together in an SZ shape; a wrapping tube that wraps around the optical fiber units; fillings disposed inside the wrapping tube, wherein the fillings include at least one first filling and at least one second filling that are located between two adjacent optical fiber units; and a sheath that covers the wrapping tube. The first filling is in contact with the wrapping tube. The second filling is located more radially inward than the first filling in a radial direction.