公开(公告)号：US12292613B2

公开(公告)日：2025-05-06

申请号：US18013324

申请日：2021-06-15

Applicant: FUJIKURA LTD.

Inventor： Hironori Sato ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

Abstract: An optical cable includes optical fiber units each of which includes intermittently-coupled optical fiber ribbons. In at least one of the optical fiber units, in a cross section perpendicular to a longitudinal direction of the at least one of the optical fiber units, a length of a vector GU is shorter than a largest length of vectors MG of the intermittently-coupled optical fiber ribbons forming the at least one of the optical fiber units, where, in each of the intermittently-coupled optical fiber ribbons, each of the vectors MG is a vector starting from M and ending at G, M is a midpoint between optical fibers at both ends of the each of the intermittently-coupled optical fiber ribbons, and G is a center of gravity of the each of the intermittently-coupled optical fiber ribbons, and the vector GU is a resultant vector of the vectors MG.

公开(公告)号：US20250067948A1

公开(公告)日：2025-02-27

申请号：US18724446

申请日：2022-12-15

Applicant: Fujikura Ltd.

Inventor： Hironori Sato ,  Itaru Ishida ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber assembly includes: bundled optical fiber units, each of which is configured by stacking optical fiber ribbons. A stacked state of the optical fiber ribbons in an optical fiber unit of the bundled optical fiber units is collapsed such that a ribbon surface of at least one of the optical fiber ribbons configuring the optical fiber unit is bent, in a cross section of the optical fiber assembly orthogonal to a longitudinal direction of the optical fiber assembly at least at a first position in the longitudinal direction. The bundled optical fiber units include one or more first fiber units located on a neutral line of bending of the optical fiber assembly and a second fiber unit located farthest from the neutral line, in a cross section of the optical fiber assembly orthogonal to the longitudinal direction.

公开(公告)号：US20250067947A1

公开(公告)日：2025-02-27

申请号：US18724327

申请日：2022-12-15

Applicant: Fujikura Ltd.

Inventor： Hironori Sato ,  Itaru Ishida ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber assembly includes: bundled optical fiber units, each of which is configured by stacking optical fiber ribbons. A stacked state of the optical fiber ribbons in an optical fiber unit of the bundled optical fiber units is collapsed such that a ribbon surface of at least one of the optical fiber ribbons configuring the optical fiber unit is bent, in a cross section of the optical fiber assembly orthogonal to a longitudinal direction of the optical fiber assembly at least at a first position in the longitudinal direction. The bundled optical fiber units include inner layer fiber units located on an inner side in a radial direction of the optical fiber assembly, and outer layer fiber units located on an outer side in the radial direction of the optical fiber assembly relative to the inner layer fiber units, in a cross section of the optical fiber assembly.

公开(公告)号：US20250052967A1

公开(公告)日：2025-02-13

申请号：US18932811

申请日：2024-10-31

Applicant: AFL Telecommunications LLC ,  FUJIKURA LTD.

Inventor： Joseph Cignarale ,  Doug Baker ,  Yoshio Hashimoto ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable including an optical fiber ribbon in a pipe, wherein the ribbon includes at least two optical fibers arranged side by side, and wherein at least two of the optical fibers are bonded intermittently along a length of the fibers.

公开(公告)号：US20240248270A1

公开(公告)日：2024-07-25

申请号：US18560427

申请日：2022-04-20

Applicant: Fujikura Ltd.

Inventor： Okimi Mukai ,  Ken Osato ,  Akira Namazue

IPC: G02B6/44

CPC classification number: G02B6/4432 ,  G02B6/4435

Abstract: An optical fiber cable includes optical fibers, a wrapping tube that wraps around the optical fibers and contacts outermost ones of the optical fibers, and a sheath that covers the wrapping tube and has recesses on an inner circumferential surface of the sheath. The recesses are recessed toward a radially outer side of the optical fiber cable such that a space exists between the wrapping tube and the sheath in each of the recesses.

公开(公告)号：US20240241336A1

公开(公告)日：2024-07-18

申请号：US18561894

申请日：2022-02-28

Applicant: FUJIKURA LTD.

Inventor： Hironori Sato ,  Hiroyuki Takahashi ,  Itaru Ishida ,  Ken Osato

IPC: G02B6/44 ,  G01L1/24 ,  G01M11/02 ,  G01M11/08

CPC classification number: G02B6/448 ,  G01L1/242 ,  G01M11/0214 ,  G01M11/088

Abstract: A manufacturing method for manufacturing an optical fiber ribbon, the manufacturing method includes intermittently forming, with a connecting device, connection parts between optical fibers measuring a load of the connecting device during the intermittent forming of the connection parts, and detecting an abnormality based on the load.

公开(公告)号：US12013586B2

公开(公告)日：2024-06-18

申请号：US17925400

申请日：2021-02-16

Applicant: Fujikura Ltd.

Inventor： Masatoshi Ohno ,  Akira Namazue ,  Ken Osato

IPC: G02B6/46 ,  G02B6/44

CPC classification number: G02B6/566 ,  G02B6/4429

Abstract: An optical fiber cable includes: a cable body that includes an optical fiber; an external sheath that accommodates the cable body; a protective layer that is disposed between the cable body and the external sheath and that includes a first groove on an inner circumferential surface of the protective layer, wherein the first groove extends along an axial direction of the cable body; and a first ripcord disposed in the first groove and between the cable body and the protective layer.

公开(公告)号：US11921341B2

公开(公告)日：2024-03-05

申请号：US18155309

申请日：2023-01-17

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Masatoshi Ohno ,  Akira Namazue ,  Ken Osato ,  Yusuke Yamada ,  Yuta Maruo ,  Akira Sakurai ,  Shigekatsu Tetsutani ,  Hiroaki Tanioka

IPC: G02B6/44

CPC classification number: G02B6/448 ,  G02B6/4404 ,  G02B6/4413 ,  G02B6/4432 ,  G02B6/4434

Abstract: An optical cable includes: twisted optical fiber units each including a fiber group formed by optical fibers. At least one of the optical fiber units includes a filling that wraps an outer circumference of the fiber group.

公开(公告)号：US20230365378A1

公开(公告)日：2023-11-16

申请号：US18036601

申请日：2021-09-07

Applicant: Fujikura Ltd.

Inventor： Takafumi Sato ,  Masayuki Ishioka ,  Ryo Inagaki ,  Ken Osato

IPC: B65H75/36

CPC classification number: B65H75/362

Abstract: A housing unit includes: a linear material; and a housing body that houses the linear material. In the housing body, winding regions in which the linear material is wound are disposed in a circumferential direction. The linear material is wound in a figure eight in a first region pair constituted by a pair of the winding regions. The linear material is wound in a figure eight in a second region pair constituted by a pair of the winding regions that are different from the winding regions constituting the first region pair.

公开(公告)号：US20230350145A1

公开(公告)日：2023-11-02

申请号：US18350446

申请日：2023-07-11

Applicant: FUJIKURA LTD.

Inventor： Shogo Shimizu ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/4432 ,  G02B6/4403 ,  G02B6/4405 ,  G02B6/4404 ,  G02B6/441

Abstract: An optical fiber cable includes: a sheath; a core that is housed in the sheath and comprises optical fibers; tensile strength members embedded in the sheath; and ripcords embedded in the sheath. Recesses and protrusions are disposed alternately in a circumferential direction on an outer circumferential surface of the sheath. The recesses each include: two connecting portions respectively connected to radial inner ends of two adjacent protrusions; and a bottom surface positioned between the two connecting portions. In a transverse cross-sectional view, the ripcords are positioned inside some of the protrusions, and the tensile strength members are positioned inside the remaining protrusions.