Patents by Inventor Yoshiaki Nagao

Yoshiaki Nagao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190204519
    Abstract: There is provided an intermittent connection type optical fiber ribbon in which at least a part of a plurality of optical fibers that are arranged to be in parallel come into contact with each other, and between a part or the entirety of the optical fibers, a connection portion at which the adjacent optical fibers are connected to each other with an adhesive resin, and a non-connection portion at which the adjacent optical fibers are not connected to each other with the adhesive resin, are intermittently provided in the longitudinal direction, in which an outer diameter dimension of the optical fiber is equal to or less than 0.22 mm, and an inter-center distance of the adjacent optical fibers is 0.20±0.02 mm, and in which at least a part of the outer periphery of the optical fiber has no adhesive resin attached thereto.
    Type: Application
    Filed: February 17, 2017
    Publication date: July 4, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki SATO, Yoshiaki NAGAO, Nobuyuki SUZUKI
  • Patent number: 10268009
    Abstract: An optical fiber cable comprises optical units having a plurality of optical fiber ribbons, a slot rod having a plurality of slot grooves in which the optical units are accommodated, and a cable sheath configured to cover an outer side of the slot rod, each of the optical fiber ribbons is intermittently provided with coupling portions, at which adjacent optical fibers are coupled therebetween, and non-coupling portions, at which adjacent optical fibers are not coupled therebetween, in a longitudinal direction between a part or all of the optical fibers in a state where the plurality of optical fibers is arranged in parallel, and an outer diameter of the optical fiber cable is 35 mm or less and a number of the optical fibers in the optical unit accommodated in one slot groove is 100 or more.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: April 23, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki Sato, Kenta Tsuchiya, Keisuke Okada, Yoshiaki Nagao, Nobuyuki Suzuki
  • Patent number: 10268015
    Abstract: This optical fiber cable comprises an optical unit obtained by creating strands of a plurality of optical fiber tape cores, a tube in which the optical unit is housed, and a cable sheath that covers the outside of an aggregate of a plurality of tubes. The optical fiber tape cores have provided thereto, between some or all of optical fiber cores when a plurality of optical fiber cores are positioned in parallel, and intermittently in the longitudinal direction thereof, connecting parts that connect adjoining optical fiber cores, and non-connecting parts at which adjoining optical fiber cores are not connected. The tube has a Young's modulus lower than the Young's modulus of the cable sheath, and the aggregate is such that the plurality of tubes on the inside of the cable sheath deform elastically with respect to one another, with some thereof being in surface contact with the cable sheath.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: April 23, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki Sato, Keisuke Okada, Yoshiaki Nagao, Nobuyuki Suzuki
  • Publication number: 20190064462
    Abstract: An optical fiber cable includes optical fiber ribbons of no less than 12, a slot rod including slot grooves in which the optical fiber ribbons are housed, a tension member, and a cable sheath. The optical fiber ribbons include, at a part of or through all of the optical fiber core wires, in a state where the optical fiber core wires are arranged in parallel, a connecting part where adjacent optical fiber core wires are connected and a non-connecting part where adjacent optical fiber core wires are not connected, which are provided intermittently in a longitudinal direction. A relationship between the number “x” of the optical fiber core wires housed in the optical fiber cable and flexural rigidity “y” (N·mm2) of the optical fiber cable satisfies following Expression 1. y?3e0.
    Type: Application
    Filed: February 8, 2017
    Publication date: February 28, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Keisuke OKADA, Fumiaki SATO, Yoshiaki NAGAO, Nobuyuki SUZUKI
  • Publication number: 20190011656
    Abstract: Provided is an optical fiber cable whereby macrobend loss can be suppressed even when ribbons are mounted at high density in grooves. An optical fiber cable provided with optical units in which ribbons each having a plurality of optical fiber cores arranged in parallel are collected, a slot rod having a plurality of grooves for accommodating optical units, a tension member on which tension is applied, and a cable jacket for covering the outside of the slot rod. Each of the optical units is accommodated in the corresponding groove in a stranded state, and the occupancy of the optical units calculated from the cross-sectional area of the optical units with respect to the cross-sectional area of the groove is 25% to 65%.
    Type: Application
    Filed: July 22, 2016
    Publication date: January 10, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki SATO, Keisuke OKADA, Yoshiaki NAGAO, Kenta TSUCHIYA, Nobuyuki SUZUKI
  • Publication number: 20180348464
    Abstract: This optical fiber cable comprises an optical unit obtained by creating strands of a plurality of optical fiber tape cores, a tube in which the optical unit is housed, and a cable sheath that covers the outside of an aggregate of a plurality of tubes. The optical fiber tape cores have provided thereto, between some or all of optical fiber cores when a plurality of optical fiber cores are positioned in parallel, and intermittently in the longitudinal direction thereof, connecting parts that connect adjoining optical fiber cores, and non-connecting parts at which adjoining optical fiber cores are not connected. The tube has a Young's modulus lower than the Young's modulus of the cable sheath, and the aggregate is such that the plurality of tubes on the inside of the cable sheath deform elastically with respect to one another, with some thereof being in surface contact with the cable sheath.
    Type: Application
    Filed: January 26, 2017
    Publication date: December 6, 2018
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki SATO, Keisuke OKADA, Yoshiaki NAGAO, Nobuyuki SUZUKI
  • Publication number: 20180321454
    Abstract: An intermittent-connection-type optical fiber ribbon includes: a plurality of optical fiber core wires that are disposed in parallel; a connecting resin that is coated on surfaces of the plurality of optical fiber core wires; and slits that are provided intermittently in the connecting resin partially between the optical fiber core wires in a longitudinal direction, and a marking is on the connecting resin.
    Type: Application
    Filed: December 22, 2016
    Publication date: November 8, 2018
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki SATO, Keisuke OKADA, Yoshiaki NAGAO, Nobuyuki SUZUKI, Yuuki SHIMODA
  • Publication number: 20180321453
    Abstract: An optical fiber cable comprises optical units having a plurality of optical fiber ribbons, a slot rod having a plurality of slot grooves in which the optical units are accommodated, and a cable sheath configured to cover an outer side of the slot rod, each of the optical fiber ribbons is intermittently provided with coupling portions, at which adjacent optical fibers are coupled therebetween, and non-coupling portions, at which adjacent optical fibers are not coupled therebetween, in a longitudinal direction between a part or all of the optical fibers in a state where the plurality of optical fibers is arranged in parallel, and an outer diameter of the optical fiber cable is 35 mm or less and a number of the optical fibers in the optical unit accommodated in one slot groove is 100 or more.
    Type: Application
    Filed: January 26, 2017
    Publication date: November 8, 2018
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Fumiaki SATO, Kenta TSUCHIYA, Keisuke OKADA, Yoshiaki NAGAO, Nobuyuki SUZUKI
  • Publication number: 20180314020
    Abstract: An intermittent-connection-type optical fiber ribbon in which a plurality of optical fiber core wires are disposed in parallel, and which includes: a connecting part where adjacent optical fiber core wires are connected; and a non-connecting part where adjacent optical fiber core wires are not connected, the connecting parts and the non-connecting parts are provided intermittently in a longitudinal direction, the non-connecting parts are not provided in the longitudinal direction between two the optical fiber core wires, the connecting part is recessed, and in a case where, in the longitudinal direction, a is length of the connecting part, b is length of a part where the non-connecting part between different optical fiber core wires overlap, c is length of the non-connecting part, and p is an interval of the connecting parts, c/a?1.5, b?50 mm, and (c/a)×p?200 mm are set.
    Type: Application
    Filed: January 11, 2017
    Publication date: November 1, 2018
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki SATO, Kenta TSUCHIYA, Keisuke OKADA, Yoshiaki NAGAO, Nobuyuki SUZUKI
  • Patent number: 10033899
    Abstract: A lighting device includes a light source, a board, and a light guide. The light source emits light. The board mounts the light source on a mount surface perpendicular to a light emission surface of the light source. The light guide has an incident surface which the light emitted from the light source enters. The incident surface is opposed to the light emission surface. The light guide extends from the incident surface in a direction of the emitted light and is bent toward an irradiated surface of an irradiation target on a way of the light guide. The board is disposed such that an opposite surface of the board opposite the mount surface is opposed to the irradiated surface of the irradiation target.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: July 24, 2018
    Assignee: Ricoh Company LTD.
    Inventors: Masatoshi Ishida, Yoshiaki Nagao, Satoshi Narai, Atsushi Sugai, Masafumi Kishi, Makoto Noda
  • Publication number: 20160352955
    Abstract: A lighting device includes a light source, a board, and a light guide. The light source emits light. The board mounts the light source on a mount surface perpendicular to a light emission surface of the light source. The light guide has an incident surface which the light emitted from the light source enters. The incident surface is opposed to the light emission surface. The light guide extends from the incident surface in a direction of the emitted light and is bent toward an irradiated surface of an irradiation target on a way of the light guide. The board is disposed such that an opposite surface of the board opposite the mount surface is opposed to the irradiated surface of the irradiation target.
    Type: Application
    Filed: May 26, 2016
    Publication date: December 1, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Masatoshi ISHIDA, Yoshiaki NAGAO, Satoshi NARAI, Atsushi SUGAI, Masafumi KISHI, Makoto NODA
  • Publication number: 20150365553
    Abstract: A lens unit includes a barrel lens; a single lens disposed downstream in a light incidence direction relative to the barrel lens, having a concave lens surface opposite the barrel lens, being an anisotropic lens in a main and sub-scanning directions, having a gradually increasing thickness from a center to lateral ends, and including fixed faces disposed on a side of the concave lens surface at both lateral ends in the longitudinal direction of a non-optical surface thereof; a single lens holder formed of lens holding parts to support the barrel lens, disposed between the barrel lens and the single lens, and including lens holding faces to be fixed to the fixed faces of the single lens; and an image sensor. The lens unit is configured such that reflected light from a document is focused on the image sensor via the barrel lens and the single lens.
    Type: Application
    Filed: June 1, 2015
    Publication date: December 17, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Atsushi SUGAI, Yoshiaki NAGAO
  • Patent number: 8811783
    Abstract: An optical fiber ribbon comprising a plurality of the coated optical fibers 2 arranged in plane and flame-retardant films 4a and 4b to integrate the coated optical fibers 2 is provided. The flame-retardant films 4a and 4b have an adhesive layer 5 formed thereon, and a plurality of the coated optical fibers 2 arranged in plane are integrated by the adhesive layer. The optical fiber ribbon 1 in this constitution uses flame-retardant films, wherein the ribbon thickness can be lowered and separation of single fiber can be facilitated by tearing off the film.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: August 19, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kousuke Tanaka, Hiroyasu Sugiyama, Takehiro Hosokawa, Keiichi Tanaka, Tsuyoshi Ikada, Kazuaki Negishi, Yoshiaki Nagao, Toshio Akiyoshi, Kazuhiro Sato
  • Publication number: 20140078560
    Abstract: A tilt adjustment mechanism that is installed in an optical device that captures an image by using an image capturing unit part in which an image capturing sensor to capture an image and an imaging lens to image an image on the image capturing sensor are mounted on a holding member to constitute a unit part, the tilt adjustment mechanism is configured to adjust tilt of the image capturing unit part by rotating the image capturing unit part about the center of the imaging lens.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 20, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Yoshiaki NAGAO, Tatsuaki NAGANO, Shohei SHINKAWA, Masatoshi ISHIDA, Atsushi SUGAI
  • Publication number: 20140071501
    Abstract: A document scanning module includes an image sensor; and imaging lenses that focus light reflected from a document onto the image sensor to form an image. The imaging lenses include a front-group lens arranged on a document side, and a rear-group lens arranged on an image sensor side and having a width in a main-scanning direction. The rear-group lens includes an attachment portion extending toward the image sensor. The attachment portion is joined to a longitudinal side surface of the image sensor.
    Type: Application
    Filed: August 26, 2013
    Publication date: March 13, 2014
    Applicant: Ricoh Company, Limited
    Inventors: Shohei SHINKAWA, Yoshiaki NAGAO, Tatsuaki NAGANO, Atsushi SUGAI, Masatoshi ISHIDA
  • Publication number: 20130293932
    Abstract: An image capturing device includes a frame; a light source provided in the frame to irradiate a target with light; an image sensor that receives light reflected by the target to capture an image of the target; an imaging lens unit formed of a plurality of lenses configured to focus the light reflected by the target on the image sensor; and reflecting mirrors to direct the light reflected by the target to the imaging lens unit. In the image capturing device, an image capturing position is corrected by changing a posture of the reflecting mirror relative to the frame of the image capturing device and a skewed image is corrected by changing the posture of the reflecting mirror relative to the frame of the image capturing device.
    Type: Application
    Filed: April 2, 2013
    Publication date: November 7, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Atsushi SUGAI, Yoshiaki NAGAO, Tatsuaki NAGANO, Shohei SHINKAWA, Masatoshi ISHIDA
  • Patent number: 7700876
    Abstract: An external device that is electrically connected to a main unit by a plurality of electric cables includes a first casing member storing a function unit; an external cover covering the first casing member; and a first space provided between the first casing member and the external cover. The electric cables are pulled out of the first casing member, bundled together, supported by the first casing member, and extended out of the external cover through the first space.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: April 20, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Sachiko Nishikino, Yoshiaki Nagao, Takehisa Shimazu
  • Patent number: 7623813
    Abstract: A drive shaft, which is driven by a drive motor, is held firmly at two points by bearing structures. The bearing structure has a hole in which a bearing member is fit. The bearing member has hole, which is concentric with respect to the hole in which the bearing member is fit. A crimp, which is made of elastic material, having interfering portions that interfere with the bearing member is provided between the bearing member and the hole in the bearing structure in which the bearing member is fit.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: November 24, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuji Takahashi, Yoshiaki Nagao, Sachiko Nishikino
  • Patent number: 7292809
    Abstract: A drive unit including a drive shaft, a drive pulley attached to the drive shaft, and a drive wire driven by the drive pulley so as to move a movable body. The drive pulley is formed by press working or rolling.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: November 6, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Sachiko Nishikino, Takuji Takahashi, Yoshiaki Nagao
  • Publication number: 20070121176
    Abstract: An optical unit may include an image pick-up device, a lens unit and a holding member. The image pick-up device may convert a reflected light reflected from an original document to an electric signal, after the light is irradiated on the original document from a light source. The lens unit may image the reflected light on the image pick-up device. The holding member may hold the image pick-up device and lenses. The direction of a fluctuation of a focal length of the lens unit caused by heat and a direction of the fluctuation of a distance between the image pick-up device and the lens unit caused by heat may agree with each other.
    Type: Application
    Filed: November 27, 2006
    Publication date: May 31, 2007
    Inventors: Kohichi Yamazaki, Tetsuya Kimura, Hiroshi Kusumoto, Yoshiaki Nagao, Takehisa Shimazu