Patents by Inventor Makoto Tojo

Makoto Tojo 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).

  • Patent number: 11697238
    Abstract: An extruder which can be applied to various types of resin and elastomer without having to replace a die is provided. An extruder of the present inventions has: a barrel to which raw material, that is raw elastomer or raw material resin, is supplied; a screw that is driven to rotate in the barrel in order to process the raw material together with the barrel; and die 5 that is provided at a discharge point of the barrel and that discharges the raw material that has been processed. Die 5 includes first flat plate 11 having at least one first hole 13 and second flat plate 12 having at least one second hole 14, wherein first flat plate 11 and second flat plate 12 are arranged adjacent to each other along longitudinal axis X1 of the barrel, and at least either first flat plate 11 or second flat plate 12 is movable relative to the other flat plate such that an overlapping part of first hole 13 and second hole 14 can be varied.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: July 11, 2023
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Kiyoshi Handa, Yohei Shimizu, Makoto Tojo, Jun Kakizaki
  • Patent number: 11312056
    Abstract: A twin screw extruder (10) for producing a fiber-reinforced resin composition, which is obtained by charging the extruder with a thermoplastic resin and reinforcing fibers in roving form and the reinforcing fibers being fibrillated/cut and being dispersed/kneaded into the thermoplastic resin, comprises: a plate-shaped blade (15), which protrudes from the inner surface of a cylinder (11) and faces a screw (20) and the longitudinal direction of which faces the axial direction of the cylinder; and a height adjustment means (16) for adjusting the gap between the blade (15) and the screw (20).
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: April 26, 2022
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Yoshitaka Kimura, Makoto Tojo, Daigo Saga
  • Publication number: 20210373061
    Abstract: A measurement probe that measures a change in an optical signal caused by electro-optic effect according to an electromagnetic wave, and measures spatial distribution characteristics of the electromagnetic wave, based on differential values detected while the measurement probe and the electromagnetic wave move relative to each other. The measurement probe includes a first measurement device having a sensor structure including an electro-optic crystal that exhibits the electro-optic effect, an optical fiber that is provided on a root side of the electro-optic crystal and transmits the optical signal, and a reflection device that is provided on a tip end side of the electro-optic crystal and reflects the optical signal, and a second measurement device having the sensor structure. In first and second directions perpendicular to a fiber axis direction, a size of the electro-optic crystal is set to one third or less of a wavelength of the target electromagnetic wave.
    Type: Application
    Filed: November 1, 2019
    Publication date: December 2, 2021
    Applicants: NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM, Think-Lands Co., Ltd.
    Inventors: Shintaro HISATAKE, Yoichi OIKAWA, Kunio MIYAJI, Makoto TOJO
  • Publication number: 20210263089
    Abstract: A measurement probe used in an electromagnetic wave measurement system is provided. The measurement probe includes a first measurement device and a second measurement device. The first measurement device includes a first electro-optic crystal that exhibits an electro-optic effect, a first optical fiber that is provided on a root side of the first electro-optic crystal and transmits an optical signal, and a first reflector that is provided on a tip side of the first electro-optic crystal and reflects the optical signal. The second measurement device includes a second electro-optic crystal, a second optical fiber, and a second reflector. The first and second electro-optic crystals form one electro-optic crystal, and the first and second optical fibers are connected to a root side of the one electro-optic crystal.
    Type: Application
    Filed: May 6, 2021
    Publication date: August 26, 2021
    Applicants: Think-Lands Co., Ltd., NATIONAL UNIVERSITY CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM
    Inventors: Shintaro HISATAKE, Yoichi Oikawa, Kunio Miyaji, Makoto Tojo
  • Publication number: 20210138711
    Abstract: A twin screw extruder (10) for producing a fiber-reinforced resin composition, which is obtained by charging the extruder with a thermoplastic resin and reinforcing fibers in roving form and the reinforcing fibers being fibrillated/cut and being dispersed/kneaded into the thermoplastic resin, comprises: a plate-shaped blade (15), which protrudes from the inner surface of a cylinder (11) and faces a screw (20) and the longitudinal direction of which faces the axial direction of the cylinder; and a height adjustment means (16) for adjusting the gap between the blade (15) and the screw (20).
    Type: Application
    Filed: August 4, 2017
    Publication date: May 13, 2021
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Yoshitaka KIMURA, Makoto TOJO, Daigo SAGA
  • Publication number: 20200338801
    Abstract: An extruder which can be applied to various types of resin and elastomer without having to replace a die is provided. An extruder of the present inventions has: a barrel to which raw material, that is raw elastomer or raw material resin, is supplied; a screw that is driven to rotate in the barrel in order to process the raw material together with the barrel; and die 5 that is provided at a discharge point of the barrel and that discharges the raw material that has been processed. Die 5 includes first flat plate 11 having at least one first hole 13 and second flat plate 12 having at least one second hole 14, wherein first flat plate 11 and second flat plate 12 are arranged adjacent to each other along longitudinal axis X1 of the barrel, and at least either first flat plate 11 or second flat plate 12 is movable relative to the other flat plate such that an overlapping part of first hole 13 and second hole 14 can be varied.
    Type: Application
    Filed: November 1, 2017
    Publication date: October 29, 2020
    Applicant: The Japan Steel Works, Ltd.
    Inventors: Kiyoshi HANDA, Yohei SHIMIZU, Makoto TOJO, Jun KAKIZAKI
  • Patent number: 10518441
    Abstract: An extruder (1) includes a cylinder (2) and a screw (3), and one or more front vents (8a) are provided on the cylinder (2) upstream of a hopper (5) and downstream of a rear vent (7). The cylinder (2) is provided with, between the hopper (5) and the rear vent (7), a liquid supply device (9) for spraying water into the cylinder (2) to cool an interior thereof and a liquid discharge port (12) that is opened in a lower portion of the cylinder (2).
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: December 31, 2019
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Makoto Tojo, Yohei Shimizu, Daigo Saga
  • Publication number: 20180001514
    Abstract: An extruder (1) includes a cylinder (2) and a screw (3), and one or more front vents (8a) are provided on the cylinder (2) upstream of a hopper (5) and downstream of a rear vent (7). The cylinder (2) is provided with, between the hopper (5) and the rear vent (7), a liquid supply device (9) for spraying water into the cylinder (2) to cool an interior thereof and a liquid discharge port (12) that is opened in a lower portion of the cylinder (2).
    Type: Application
    Filed: January 13, 2016
    Publication date: January 4, 2018
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Makoto TOJO, Yohei SHIMIZU, Daigo SAGA
  • Patent number: 9731448
    Abstract: A vent assembly device for a twin-screw extruder includes a vent assembly (7) that has a vent opening (6) and that is provided in a cylinder (1) of a twin-screw extruder (11) having a left axis-side screw (2) and a right axis-side screw (3). The size of at least the vent opening (6) of the vent assembly (7) can be freely modified by forming the vent assembly (7) from a plurality of vent assembly units (7a) and by providing the plurality of vent assembly units (7a) for one vent opening (6).
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: August 15, 2017
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Makoto Tojo, Yoshihiko Iwamoto, Jun Kakizaki
  • Publication number: 20150314512
    Abstract: The vent assembly device for a twin-screw extruder according to the present invention includes a vent assembly (7) that has a vent opening (6) and that is provided in a cylinder (1) of a twin-screw extruder (11) having a left axis-side screw (2) and a right axis-side screw (3). The size of at least the vent opening (6) of the vent assembly (7) can be freely modified by forming the vent assembly (7) from a plurality of vent assembly units (7a) and by providing the plurality of vent assembly units (7a) for one vent opening (6).
    Type: Application
    Filed: February 13, 2014
    Publication date: November 5, 2015
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Makoto TOJO, Yoshihiko IWAMOTO, Jun KAKIZAKI
  • Patent number: 7565949
    Abstract: An image display module include a flat panel display, a sound source element disposed on a rear surface side opposite to a display observation side of the panel display, and a sound leading path through which a sound wave generated from the sound source element is led to the display observation side.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: July 28, 2009
    Assignee: Casio Computer Co., Ltd.
    Inventor: Makoto Tojo
  • Publication number: 20070071259
    Abstract: An image display module include a flat panel display, a sound source element disposed on a rear surface side opposite to a display observation side of the panel display, and a sound leading path through which a sound wave generated from the sound source element is led to the display observation side.
    Type: Application
    Filed: September 25, 2006
    Publication date: March 29, 2007
    Applicant: CASIO COMPUTER CO., LTD.
    Inventor: Makoto Tojo
  • Patent number: RE45925
    Abstract: An image display module include a flat panel display, a sound source element disposed on a rear surface side opposite to a display observation side of the panel display, and a sound leading path through which a sound wave generated from the sound source element is led to the display observation side.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: March 15, 2016
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Makoto Tojo