Patents by Inventor Tetsuya Atsumi

Tetsuya Atsumi 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: 10501618
    Abstract: Provided are an epoxy resin composition which contains an epoxy resin and a curing agent, and satisfies the following (1), (2), and (3): (1) the bending elastic modulus of a cured product of the epoxy resin composition is 3.3 GPa or higher; (2) the bending strain at break of the cured product of the epoxy resin composition is 9% or higher; and (3) the fiber-reinforced plastic ? formed of the cured product of the epoxy resin composition and a reinforcing fiber substrate in which carbon fibers, which are continuous fibers, are evenly aligned in one direction has 90° bending strength of 95 MPa or higher, and a film, a prepreg, and fiber-reinforced plastic that are produced by using the epoxy resin composition.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: December 10, 2019
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tomoko Ishimoto, Manabu Kaneko, Tetsuya Atsumi, Kenichi Watanabe
  • Patent number: 10384826
    Abstract: A packing box including lattice members which are arranged in a stacked state into stages, a stage-partition plate which is arranged between the stages of the lattice members, two or more inner tubular-trunk frames which are provided in a stacking direction of the lattice members to surround one or more stages of the lattice members, an outer tubular-trunk frame surrounding an outside of two or more stages of the inner tubular-trunk frames, a bottom lid which is arranged under the outer tubular-trunk frame, and a top lid which is arranged on the outer tubular-trunk frame.
    Type: Grant
    Filed: July 9, 2016
    Date of Patent: August 20, 2019
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventor: Tetsuya Atsumi
  • Patent number: 9856354
    Abstract: By completing curing in a short period of time even at low temperatures and using an epoxy resin composition as a matrix resin of a prepreg, it is possible to obtain a fiber-reinforced composite plastic product such as a fiber-reinforced tubular composite with excellent mechanical properties and, more particularly, excellent impact resistance. The epoxy resin composition includes A component, B component, C component, D component and E component, where the content rate of sulfur atoms is equal to or more than 0.2 wt % and equal to or less than 7 wt %, and the content rate of the C component is equal to or more than 1 wt % and equal to or less than 15 wt %. A component: epoxy resins, B component: reactive products of the epoxy resins and an amine compounds including the sulfur atom in a molecule (the unreacted epoxy resins and/or the amine compounds may be included), C component: polyamide compounds soluble in the A component, D component: urea compounds, and E component: dicyandiamide.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: January 2, 2018
    Assignees: MITSUBISHI CHEMICAL CORPORATION, MRC COMPOSITE PRODUCTS CO., LTD.
    Inventors: Youhei Miwa, Tadayoshi Saitou, Masato Taguchi, Mikihiro Uchizono, Tetsuya Atsumi, Tsutomu Ibuki
  • Publication number: 20170008663
    Abstract: A packing box including lattice members which are arranged in a stacked state into stages, a stage-partition plate which is arranged between the stages of the lattice members, two or more inner tubular-trunk frames which are provided in a stacking direction of the lattice members to surround one or more stages of the lattice members, an outer tubular-trunk frame surrounding an outside of two or more stages of the inner tubular-trunk frames, a bottom lid which is arranged under the outer tubular-trunk frame, and a top lid which is arranged on the outer tubular-trunk frame.
    Type: Application
    Filed: July 9, 2016
    Publication date: January 12, 2017
    Inventor: Tetsuya Atsumi
  • Publication number: 20160325157
    Abstract: Its objectives are to provide a golf club shaft that is capable of responding to a wide range of characteristics of a head to be mounted, levels and preferences of golfers, and the like; maintaining the ease of swing even when a heavier head is mounted; providing a preferred feel for a golfer, even when the subject is a professional or low handicap golfer; and increasing the carry of a ball. A golf club shaft made of multiple fiber-reinforced resin layers, containing a heavy substance with a specific gravity of 7 or greater positioned between 0 and 400 mm from the grip end of the golf club shaft; in such a golf club shaft, when the entire length of the golf club shaft is set as Ls and the distance from the head end to the gravity center of the golf club shaft is set as Lg, the ratio Lg/Ls is 0.54˜0.65.
    Type: Application
    Filed: December 26, 2014
    Publication date: November 10, 2016
    Applicant: Mitsubishi Rayon Co., Ltd.
    Inventors: Tetsuya ATSUMI, Takashi KANEKO, Satoshi SHIMONA
  • Patent number: 9488945
    Abstract: An image forming apparatus that can reduce a toner bearing amount stably regardless of a density of an image. The image forming apparatus comprises a first generating unit which generates a reference pattern, and a second generating unit which generates, based on image data, a correction pattern for thinning out dots at a region from halftone density to high density. The image data is converted based on the reference pattern generated by the first generating unit and the correction pattern generated by the second generating unit. The image forming apparatus further comprises a photoreceptor. The photoreceptor is charged, the charged photoreceptor is exposed based on the converted image data to form an electrostatic latent image, and the electrostatic latent image is developed.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: November 8, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomohito Ishida, Tetsuya Atsumi, Megumi Uchino, Shunichi Takada
  • Publication number: 20160297959
    Abstract: Provided are an epoxy resin composition which contains an epoxy resin and a curing agent, and satisfies the following (1), (2), and (3): (1) the bending elastic modulus of a cured product of the epoxy resin composition is 3.3 GPa or higher; (2) the bending strain at break of the cured product of the epoxy resin composition is 9% or higher; and (3) the fiber-reinforced plastic ? formed of the cured product of the epoxy resin composition and a reinforcing fiber substrate in which carbon fibers, which are continuous fibers, are evenly aligned in one direction has 90° bending strength of 95 MPa or higher, and a film, a prepreg, and fiber-reinforced plastic that are produced by using the epoxy resin composition.
    Type: Application
    Filed: December 2, 2014
    Publication date: October 13, 2016
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventors: Tomoko ISHIMOTO, Manabu KANEKO, Tetsuya ATSUMI, Kenichi WATANABE
  • Patent number: 9421583
    Abstract: A rinsing apparatus for polycrystalline silicon lump which is obtained by cutting or breaking a rod of polycrystalline silicon, including: a wash basket having a plurality of through holes, which carries the polycrystalline silicon lump; a wash tank in which the wash basket is provided therein, in which rinse water is continuously supplied from a water supply port which is arranged at a bottom part of the wash tank; an inner cage having a plurality of openings which is smaller than the through holes of the wash basket at a bottom part thereof, provided in the wash tank, in which the wash basket is stored therein; and a swing device holding and swinging the wash basket in the inner cage, and: an overflow part which recovers the rinse water overflowed from an upper portion of the wash tank is provided at the wash tank.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: August 23, 2016
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventor: Tetsuya Atsumi
  • Publication number: 20160062290
    Abstract: An image forming apparatus that can reduce a toner bearing amount stably regardless of a density of an image. The image forming apparatus comprises a first generating unit which generates a reference pattern, and a second generating unit which generates, based on image data, a correction pattern for thinning out dots at a region from halftone density to high density. The image data is converted based on the reference pattern generated by the first generating unit and the correction pattern generated by the second generating unit. The image forming apparatus further comprises a photoreceptor. The photoreceptor is charged, the charged photoreceptor is exposed based on the converted image data to form an electrostatic latent image, and the electrostatic latent image is developed.
    Type: Application
    Filed: August 21, 2015
    Publication date: March 3, 2016
    Inventors: Tomohito Ishida, Tetsuya Atsumi, Megumi Uchino, Shunichi Takada
  • Patent number: 9238876
    Abstract: A method of washing polycrystalline silicon is provided. The method includes a step of acid cleaning in which the polycrystalline silicon is cleaned with an acid solution and a step of a water cleaning in which the polycrystalline silicon is cleaned by pure water after the step of acid cleaning. In the step of water cleaning, residual acid solution on the surface of the polycrystalline silicon is removed by immersing the polycrystalline silicon in pure water held in a water cleaning bath, and replacing the pure water in the water cleaning bath at least once. The electrical conductivity (C) of the pure water in the water cleaning bath is measured. Based on the reading of the electrical conductivity (C), the timing for finishing the step of water cleaning is decided.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: January 19, 2016
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Kazuhiro Sakai, Tetsuya Atsumi, Yukiyasu Miyata
  • Publication number: 20160011539
    Abstract: An image forming apparatus includes: an image bearing member; an electric potential sensor which detects electric potential of a toner image; a density sensor which acquires information of a density of the toner image; and a controller which controls contrast electric potential and the AC bias based on a result of the detection of the density sensor and a predetermined target value, wherein the controller decreases the development contrast, and increases the AC bias, when a charging electric potential difference, which is a potential difference between a potential of a predetermined toner image developed by the development device on the image bearing member and the DC bias applied to the development device when the predetermined toner image is developed, increases from a first predetermined value to a second predetermined value;
    Type: Application
    Filed: July 2, 2015
    Publication date: January 14, 2016
    Inventors: Tomohito Ishida, Tetsuya Atsumi, Kenta Kubo, Megumi Uchino, Shunichi Takada
  • Publication number: 20150053236
    Abstract: A rinsing apparatus for polycrystalline silicon lump which is obtained by cutting or breaking a rod of polycrystalline silicon, including: a wash basket having a plurality of through holes, which carries the polycrystalline silicon lump; a wash tank in which the wash basket is provided therein, in which rinse water is continuously supplied from a water supply port which is arranged at a bottom part of the wash tank; an inner cage having a plurality of openings which is smaller than the through holes of the wash basket at a bottom part thereof, provided in the wash tank, in which the wash basket is stored therein; and a swing device holding and swinging the wash basket in the inner cage, and: an overflow part which recovers the rinse water overflowed from an upper portion of the wash tank is provided at the wash tank.
    Type: Application
    Filed: October 8, 2014
    Publication date: February 26, 2015
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventor: Tetsuya Atsumi
  • Patent number: 8887744
    Abstract: A rinsing apparatus for polycrystalline silicon lump which is obtained by cutting or breaking a rod of polycrystalline silicon, including: a wash basket having a plurality of through holes, which carries the polycrystalline silicon lump; a wash tank in which the wash basket is provided therein, in which rinse water is continuously supplied from a water supply port which is arranged at a bottom part of the wash tank; an inner cage having a plurality of openings which is smaller than the through holes of the wash basket at a bottom part thereof, provided in the wash tank, in which the wash basket is stored therein; and a swing device holding and swinging the wash basket in the inner cage, and: an overflow part which recovers the rinse water overflowed from an upper portion of the wash tank is provided at the wash tank.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: November 18, 2014
    Assignee: Mitsubishi Materials Corporation
    Inventor: Tetsuya Atsumi
  • Patent number: 8875720
    Abstract: Disclosed is a polycrystalline silicon washing apparatus that sequentially immerses polycrystalline silicon into a plurality of acid baths each of which is filled with an acid to wash the polycrystalline silicon. The temperatures of the acids in the acid baths are set such that the temperature of the acid in a later acid bath of adjacent acid baths is equal to or lower than that of a former acid bath and the temperature of the acid in the last acid bath is lower than that of the acid in the first acid bath. Each of the acid baths is provided with a temperature adjusting unit that controls the temperature of the acid at a constant value.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: November 4, 2014
    Assignee: Mitsubishi Materials Corporation
    Inventors: Kazuhiro Sakai, Tetsuya Atsumi, Yukiyasu Miyata
  • Publication number: 20140270826
    Abstract: The image forming apparatus includes an image carrier, a developer carrier, a magnetic field generation unit that is fixedly disposed in a hollow part of the developer carrier and includes a plurality of magnetic poles disposed in a circumferential direction of the developer carrier, a conductive member disposed so as to oppose a predetermined magnetic pole, of the plurality of magnetic poles, which is located odd-number pole upstream of a magnetic pole corresponding to a developing area D in a rotational direction of the developer carrier, a power source that can apply a voltage to the conductive member, a potential detection unit configured to detect pre-development and post-development potentials of a predetermined image formed on the image carrier, and a changing unit configured to change the voltage to be applied from the power source to the conductive member based on a detection result obtained by the potential detection unit.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 18, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kenta Kubo, Tetsuya Atsumi, Tomohito Ishida, Megumi Uchino, Shunichi Takada
  • Patent number: 8472829
    Abstract: A toner amount measuring unit irradiates a toner image formed on an image carrying member with light, and an image capturing unit captures an image of a reflected waveform according to light reflected by the toner image. Then, an amount of applied toner is calculated based on the peak position or peak height of the reflected waveform in accordance with information associated with the density of the toner image to be formed.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: June 25, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuya Atsumi, Kunitoshi Aoki, Yukio Nagase
  • Publication number: 20120243897
    Abstract: A toner amount measuring unit irradiates a toner image formed on an image carrying member with light, and an image capturing unit captures an image of a reflected waveform according to light reflected by the toner image. Then, an amount of applied toner is calculated based on the peak position or peak height of the reflected waveform in accordance with information associated with the density of the toner image to be formed.
    Type: Application
    Filed: June 7, 2012
    Publication date: September 27, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tetsuya Atsumi, Kunitoshi Aoki, Yukio Nagase
  • Patent number: 8213820
    Abstract: A toner amount measuring unit irradiates a toner image formed on an image carrying member with light, and an image capturing unit captures an image of a reflected waveform according to light reflected by the toner image. Then, an amount of applied toner is calculated based on the peak position or peak height of the reflected waveform in accordance with information associated with the density of the toner image to be formed.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: July 3, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuya Atsumi, Kunitoshi Aoki, Yukio Nagase
  • Patent number: 8206238
    Abstract: A shaft for a golf club comprises a plurality of fiber-reinforced resin layers. A plurality of circumferentially oriented metal wires are provided at intervals of 1 mm to 4 mm in an axial direction of the shaft having a length in an axial direction of more than 100 mm and less than 300 mm and being centered at a position of 3.25×102 mm from a larger-diameter end of the shaft.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: June 26, 2012
    Assignee: MRC Composite Products Co., Ltd.
    Inventors: Takashi Kaneko, Kouji Shiga, Tetsuya Atsumi, Tsutomu Ibuki
  • Patent number: 8200104
    Abstract: An image forming apparatus includes an image bearing member for bearing an electrostatic latent image; a charger for electrically charging the image bearing member by contact of electroconductive magnetic particles carried on a magnetic particle carrying member with the image bearing member; a developing device for developing the electrostatic latent image into a toner image by supplying toner to the electrostatic latent image; a layer thickness detecting device for detecting a thickness of a surface layer of the image bearing member; a supplying device for supplying the magnetic particles to the magnetic particle carrying member with predetermined timing; and a control device for controlling a supply amount of the magnetic particles so that the supply amount of the magnetic particles supplied by the supplying device increases with an increase of an amount of change in thickness, in terms of an absolute value, of the surface layer obtained from a detection result of the layer thickness detecting device.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: June 12, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shingo Ito, Tetsuya Atsumi, Masatsugu Toyonori