公开(公告)号：US20220357539A1

公开(公告)日：2022-11-10

申请号：US17871013

申请日：2022-07-22

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：US20220342168A1

公开(公告)日：2022-10-27

申请号：US17763271

申请日：2020-12-15

Applicant: FUJIKURA LTD.

Inventor： Akira Namazue ,  Tomoaki Kaji ,  Ken Osato

IPC: G02B6/44 ,  H01B7/17

Abstract: A cable that protects an object includes: a sheath; and a cylindrical reinforcement member disposed inside the sheath and that surrounds the object. The cylindrical reinforcement member has a first side edge and a second side edge that extend in a longitudinal direction. The cylindrical reinforcement member is formed of a cable reinforcement sheet including: a first metal sheet; and a second metal sheet joined to the first metal sheet. A portion of the first metal sheet overlaps a portion of the second metal sheet, and the overlapping portions define a joint portion where the first metal sheet and the second metal sheet are joined. The joint portion is inclined, from the second side edge to the first side edge, toward the first metal sheet.

公开(公告)号：US20220317375A1

公开(公告)日：2022-10-06

申请号：US17634138

申请日：2020-07-13

Applicant: FUJIKURA LTD.

Inventor： Soichiro Kaneko ,  Koji Tomikawa ,  Ken Osato ,  Noriaki Yamashita

IPC: G02B6/255 ,  G02B6/245 ,  G02B6/46 ,  G02B6/25 ,  G02B6/44

Abstract: An optical fiber arrangement method includes: preparing an intermittently connected optical fiber ribbon including optical fibers arranged side by side at a first pitch larger than a fiber diameter; holding a non-connecting region of the optical fiber ribbon with a holder, where connecting portions intermittently connect the optical fibers extending out from the holder to each other; changing a width of the optical fiber ribbon in an interior of the holder; and arranging the optical fibers, extending out from the holder, with intervals of the optical fibers changed from the first pitch to a second pitch smaller than the first pitch by removing the connecting portions in a state where the holder is holding the optical fibers.

公开(公告)号：US11422325B2

公开(公告)日：2022-08-23

申请号：US16825336

申请日：2020-03-20

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Akira Namazue ,  Ken Osato ,  Naoki Okada ,  Yusuke Yamada ,  Daisuke Kakuta ,  Hisaaki Nakane ,  Shinya Hamaguchi

IPC: G02B6/44 ,  G02B6/25 ,  G02B6/255 ,  G02B6/36

Abstract: Provided is an optical fiber ribbon capable of achieving higher density and reduction in diameter and accurately placing optical fibers in V-shape grooves in a fusion machine without failure. The optical fiber ribbon 1 includes three or more of optical fibers 2 arranged in parallel and connecting portions 3 connecting adjacent two optical fibers 2 together, the connecting portions 3 being intermittently provided in each of a ribbon longitudinal direction and a ribbon width direction. The connecting portions 3 are each formed in such a manner as to fill resin into a gap S formed between adjacent two optical fibers 2, and both surfaces of the respective connecting portions 3 are each formed into a recess having a concave shape curved toward a center of the gap S to separate from lines 4,5 each connecting contact points of the optical fibers 2 when being placed on a horizontal surface.

公开(公告)号：US20220171146A1

公开(公告)日：2022-06-02

申请号：US17671886

申请日：2022-02-15

Applicant: Fujikura Ltd.

Inventor： Shogo Shimizu ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

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.

公开(公告)号：US11221457B2

公开(公告)日：2022-01-11

申请号：US16753164

申请日：2018-07-23

Applicant: FUJIKURA LTD.

Inventor： Shizuka Sekine ,  Mizuki Isaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44

Abstract: An intermittent connection-type optical fiber ribbon including: optical fibers aligned in a width direction of the intermittent connection-type optical fiber ribbon; and a connection part disposed between two separation spaces that are aligned in a lengthwise direction of the intermittent connection-type optical fiber ribbon and that separate adjacent ones of the optical fibers. A percentage content of the air bubbles is equal to or less than 15.5%. The percentage content of the air bubbles is a proportion of a total area of the air bubbles contained in the connection part to an area of the connection part in a section acquired by cutting the intermittent connection-type optical fiber in the width direction.

公开(公告)号：US20210382255A1

公开(公告)日：2021-12-09

申请号：US17268313

申请日：2020-12-04

Applicant: Fujikura Ltd.

Inventor： Akira Namazue ,  Shogo Shimizu ,  Go Taki ,  Okimi Mukai ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes: a sheath including recesses and protrusions that are alternately disposed in a circumferential direction on an outer circumferential surface of the sheath; a core that includes optical fibers and is accommodated in the sheath; and tensile strength members embedded in the sheath. The core is interposed between the tensile strength members in a transverse cross-sectional view. In the transverse cross-sectional view, the tensile strength members are embedded in portions of the sheath facing outward from the core in a first direction in which the two tensile strength members face each other in the transverse cross-sectional view.

公开(公告)号：US11048054B2

公开(公告)日：2021-06-29

申请号：US16610018

申请日：2018-05-09

Applicant: Fujikura Ltd.

Inventor： Shogo Shimizu ,  Akira Namazue ,  Go Taki ,  Ken Osato

IPC: G02B6/44 ,  G02B6/48

Abstract: An optical fiber cable includes: a core; an outer filling disposed outside the core; and a sheath that covers the core and the outer filling. The core includes: optical fibers; an inner filling; and a wrapping tube that wraps the optical fibers and the inner filling. The outer filling and the inner filling absorb water.

公开(公告)号：US20210053338A1

公开(公告)日：2021-02-25

申请号：US16960180

申请日：2018-12-19

Applicant: FUJIKURA LTD.

Inventor： Shizuka Sekine ,  Kouji Tomikawa ,  Ken Osato ,  Hironori Sato

IPC: B41F9/06 ,  B41F17/10 ,  B41F31/06 ,  B41M1/10 ,  G02B6/44

Abstract: An optical fiber ribbon manufacturing device includes: fiber-supplying units that respectively supply optical fibers; a printing device that prints a mark on each of the optical fibers; and a ribbon-forming device that manufactures an optical fiber ribbon by connecting the optical fibers on each of which the mark has been printed. The printing device includes: a supplying roller that supplies an ink; and a printing roller that includes a printing pattern on a surface thereof and that prints the mark on each of the optical fibers that are lined up in a width direction of the optical fibers by causing the ink supplied from the supplying roller to adhere to the printing pattern and transferring the ink onto the optical fibers. Projections and depressions are disposed on a surface of the supplying roller. The surface of the supplying roller opposes the printing pattern of the printing roller.

公开(公告)号：US20200292771A1

公开(公告)日：2020-09-17

申请号：US16753164

申请日：2018-07-23

Applicant: FUJIKURA LTD.

Inventor： Shizuka Sekine ,  Mizuki Isaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44

Abstract: An intermittent connection-type optical fiber ribbon including: optical fibers aligned in a width direction of the intermittent connection-type optical fiber ribbon; and a connection part disposed between two separation spaces that are aligned in a lengthwise direction of the intermittent connection-type optical fiber ribbon and that separate adjacent ones of the optical fibers. A percentage content of the air bubbles is equal to or less than 15.5%. The percentage content of the air bubbles is a proportion of a total area of the air bubbles contained in the connection part to an area of the connection part in a section acquired by cutting the intermittent connection-type optical fiber in the width direction.