Patents by Inventor Ryozo Shiroishi

Ryozo Shiroishi 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: 20210069767
    Abstract: A method of producing aluminum cans, including an ironing step using an ironing die (30). The ironing die has a carbon film (50) formed as to cover a working surface thereof. The carbon film exhibits a Raman spectrum such that an intensity ratio represented by ID/IG wherein ID is a maximum peak intensity at 1333±10 cm?1 in the Raman spectrum of the surface of said carbon film, and IG is a maximum peak intensity at 1500±100 cm?1 in the Raman spectrum of the surface of said carbon film, is not less than 1.2. The surface of the carbon film is a smooth surface having an arithmetic mean roughness R of not more than 0.05 ?m. Further, the ironing step includes iron-working an aluminum sheet in a dry process using no lubricant while maintaining an ironing ratio in excess of 40%.
    Type: Application
    Filed: November 16, 2020
    Publication date: March 11, 2021
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Takuho Kumagai, Kenichi Takao, Ryozo Shiroishi, Masahiro Shimamura, Naoya Matsumoto
  • Publication number: 20210023603
    Abstract: A metallic worked article suppressing the worked surfaces from being scratched during the plastic work that is conducted aiming at reducing the thickness or decreasing the diameter. The metallic worked article has a reduced thickness or a decreased diameter as obtained through the plastic work, wherein on the worked surface thereof, the ratio Ra1/Ra2 of an arithmetic mean roughness Ra1 measured in a direction at right angles with the direction of working and an arithmetic mean roughness Ra2 measured in the direction of working, is from 0.5 to 1.5.
    Type: Application
    Filed: March 14, 2019
    Publication date: January 28, 2021
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Takuho KUMAGAI, Ryozo SHIROISHI, Naoya MATSUMOTO, Masahiro SHIMAMURA, Tomohiro OGAWA
  • Publication number: 20200071017
    Abstract: An aluminum can wherein, when the light reflected by the outer surface of the body portion of the aluminum can is evaluated based on the LCH method by using a multi-angle spectral colorimeter, the aluminum can features a ratio C15h/C15w of 0.6 to 1.4, the ratio C15h/C15w being that of a saturation value C15h of the light reflected at 15 degrees in the direction of height and a saturation value C15w of the light reflected at an angle 15 of degrees in the circumferential direction based on the light regularly reflected from the light that is incident at 45 degrees in the direction of height and in the circumferential direction.
    Type: Application
    Filed: October 20, 2017
    Publication date: March 5, 2020
    Applicants: TOYO SEIKAN CO., LTD., TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Norihisa HIROTA, Ryozo SHIROISHI, Takuho KUMAGAI, Kenichi TAKAO
  • Publication number: 20200055147
    Abstract: A method of forming grooves (3) of a fine periodic structure in the surface (1) of the diamond by irradiating at least part of the surface (1) of the diamond having a mean surface roughness Ra of not more than 0.1 ?m with a laser beam of a pulse width of not less than 1 ns generating a periodic intensity profile.
    Type: Application
    Filed: September 1, 2017
    Publication date: February 20, 2020
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Ryozo SHIROISHI, Kenichi TAKAO, Yoshiyuki YUASA
  • Patent number: 10155293
    Abstract: The diamond surface polishing method according to the present invention involves polishing a polished object, the surface of which is made of diamond, by rubbing a polishing member having an elongated shape such as a linear or belt-like shape and containing at least a metal or a metal oxide against the diamond surface, wherein a pressing force of the polishing member is controlled in accordance with material properties of the polishing member and/or a shape of the polished object and a diamond crystal size in a rubbing section so that contact surface pressure in a machining area becomes uniform.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: December 18, 2018
    Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Masahiro Shimamura, Kenichi Takao, Ryozo Shiroishi
  • Publication number: 20180318900
    Abstract: A mold used for blanking a metal plate to shape a blank to be drawn. The mold has a surface treatment film and a top face to be brought into contact with the metal plate and a peripheral end face communicated indirectly with the top face. At least the top face is coated with the surface treatment film.
    Type: Application
    Filed: November 22, 2016
    Publication date: November 8, 2018
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Ryozo SHIROISHI, Kenichi TAKAO, Takuho KUMAGAI
  • Publication number: 20180229287
    Abstract: A die (30) for ironing working, the die (30) having a carbon film 50 covering at least a working surface (41) thereof, the carbon film (50) exhibiting such a Raman spectrum that an intensity ratio represented by the following formula (1): ID/IG??(1) wherein ID is a maximum peak intensity at 1333±10 cm?1 in the Raman spectrum of the surface of the carbon film, and IG is a maximum peak intensity at 1500±100 cm?1 in the Raman spectrum of the surface of the carbon film, is not less than 1.0, and the surface of the carbon film 50 being a smooth surface having an arithmetic mean roughness R of not more than 0.1 ?m.
    Type: Application
    Filed: August 15, 2016
    Publication date: August 16, 2018
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Takuho KUMAGAI, Kenichi TAKAO, Ryozo SHIROISHI, Masahiro SHIMAMURA, Naoya MATSUMOTO
  • Publication number: 20180021912
    Abstract: The diamond surface polishing method according to the present invention involves polishing a polished object, the surface of which is made of diamond, by rubbing a polishing member having an elongated shape such as a linear or belt-like shape and containing at least a metal or a metal oxide against the diamond surface, wherein a pressing force of the polishing member is controlled in accordance with material properties of the polishing member and/or a shape of the polished object and a diamond crystal size in a rubbing section so that contact surface pressure in a machining area becomes uniform.
    Type: Application
    Filed: September 6, 2017
    Publication date: January 25, 2018
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Masahiro Shimamura, Kenichi Takao, Ryozo Shiroishi
  • Publication number: 20170106494
    Abstract: An object of the present invention is to provide the diamond polishing device having a function capable of performing polishing even a surface of a semi-closed space such as an inner circumferential surface of a cylinder member or a ring member. The polishing device of the present invention includes a polishing member having a long shape, means for delivering and winding the polishing member, a polishing member support that holds the polishing member to be capable of being wound and displaced, a base to which the polishing member support is attached, and pressing means for pressing the base toward a machining surface of a member to be polished. The base includes an extending section that extends in a direction different from the pressing direction. The polishing member support is disposed at a distal end portion of the extending section.
    Type: Application
    Filed: December 30, 2016
    Publication date: April 20, 2017
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Ryozo Shiroishi, Kenichi Takao, Takahiro Yamauchi
  • Patent number: 9149901
    Abstract: A method of polishing the diamond-surfaces generates abraded powder less, enables the polishing member to maintain an extended life and to be easily controlled, makes it possible to obtain the surfaces of a high degree of smoothness, and can be easily applied to polishing rugged three-dimensional surfaces, too. A method of polishing the diamond-surface by using a polishing member that has a metal-surface that easily reacts with carbon or of a carburizing metal, irradiating the diamond-surface with a laser beam prior to polishing the diamond-surface with the polishing member, following the irradiation with the laser beam, the polishing is conducted by rubbing a laser beam-irradiated portion with the polishing member.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: October 6, 2015
    Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Ryozo Shiroishi, Kenichi Takao
  • Publication number: 20130252515
    Abstract: A method of polishing the diamond-surfaces generates abraded powder less, enables the polishing member to maintain an extended life and to be easily controlled, makes it possible to obtain the surfaces of a high degree of smoothness, and can be easily applied to polishing rugged three-dimensional surfaces, too. A method of polishing the diamond-surface by using a polishing member that has a metal-surface that easily reacts with carbon or of a carburizing metal, irradiating the diamond-surface with a laser beam prior to polishing the diamond-surface with the polishing member, following the irradiation with the laser beam, the polishing is conducted by rubbing a laser beam-irradiated portion with the polishing member.
    Type: Application
    Filed: July 26, 2011
    Publication date: September 26, 2013
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Ryozo Shiroishi, Kenichi Takao