Patents by Inventor Ryusuke NAKATSUKA

Ryusuke NAKATSUKA 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: 20220220619
    Abstract: A method for pickling a steel plate having a first steel plate portion and a second steel plate portion which is connected to a tail end of the first steel plate portion and which requires a longer time for pickling than the first steel plate portion when pickled under the same condition includes: a step of pickling the steel plate by immersing the steel plate in an acid solution in at least one pickling tank while conveying the steel plate; a step of circulating the acid solution, through a circulation line connected to any of the at least one pickling tank, between the pickling tank and an oxidizing device disposed in the circulation line; a step of oxidizing Fe2+ in the acid solution to Fe3+ by the oxidizing device using a gaseous oxidant; and a feeding start step of, upon switching from pickling of the first steel plate portion to pickling of the second steel plate portion, starting feeding of a liquid oxidant for oxidizing Fe2+ in the acid solution to Fe3+ to any of the at least one pickling tank or to t
    Type: Application
    Filed: January 9, 2020
    Publication date: July 14, 2022
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Masashi YOSHIKAWA, Takuya HIRATA
  • Publication number: 20220154351
    Abstract: An acid solution preparation device is an acid solution preparation device for preparing an acid solution used for pickling of a steel plate, the device including a sealed tank for storing the acid solution, a gas supply part for supplying an oxygen-containing gas from outside of the sealed tank to the sealed tank, and a purge part for discharging a gas in the sealed tank to the outside.
    Type: Application
    Filed: March 22, 2019
    Publication date: May 19, 2022
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Takahiro YAGI, Masashi YOSHIKAWA, Hideaki TAKATANI, Toyoaki YASUI, Takuya HIRATA
  • Patent number: 11162177
    Abstract: To prevent over-pickling during pickling pause, shorten the time required to switch between pickling operation and pickling pause, and heat acid solution efficiently, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation device configured to circulate the acid solution between the pickling tank and the circulation tank; a control device configured to withdraw the steel strip from the acid solution; and a guide plate disposed in the pickling tank and configured to guide the acid solution circulated in the pickling tank by the acid-solution circulation device to the heat exchanger.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: November 2, 2021
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Ryusuke Nakatsuka, Kosei Tsuji, Hideaki Suemori, Koichi Nakamura
  • Publication number: 20210002774
    Abstract: A pickling facility includes: a pickling tank for storing an acid solution; a conveyance part for continuously conveying a steel plate immersed in the acid solution; a measurement part for measuring at least one parameter which has a correlation with a heat transfer coefficient between the acid solution and a reference surface disposed in the acid solution so as to face the steel plate; and a conveyance speed decision part configured to decide a conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter.
    Type: Application
    Filed: April 16, 2018
    Publication date: January 7, 2021
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Kosei TSUJI, Ryusuke NAKATSUKA, Masashi YOSHIKAWA, Shinji NANBA
  • Patent number: 10711353
    Abstract: To prevent over-pickling of a steel strip during pickling pause, and shorten the time required to switch between pickling operation and pickling pause, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation unit configured to circulate the acid solution between the pickling tank and the acid-solution storage tank; and a control device configured to control the acid-solution circulation device to maintain a liquid level of the acid solution in the pickling tank at a level below a traveling height of the steel strip.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: July 14, 2020
    Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Ryusuke Nakatsuka, Kosei Tsuji, Hideaki Suemori, Koichi Nakamura
  • Publication number: 20180312982
    Abstract: To prevent over-pickling of a steel strip during pickling pause, and shorten the time required to switch between pickling operation and pickling pause, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation unit configured to circulate the acid solution between the pickling tank and the acid-solution storage tank; and a control device configured to control the acid-solution circulation device to maintain a liquid level of the acid solution in the pickling tank at a level below a traveling height of the steel strip.
    Type: Application
    Filed: February 22, 2017
    Publication date: November 1, 2018
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Ryusuke NAKATSUKA, Kosei TSUJI, Hideaki SUEMORI, Koichi NAKAMURA
  • Publication number: 20180258541
    Abstract: To prevent over-pickling during pickling pause, shorten the time required to switch between pickling operation and pickling pause, and heat acid solution efficiently, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation device configured to circulate the acid solution between the pickling tank and the circulation tank; a control device configured to withdraw the steel strip from the acid solution; and a guide plate disposed in the pickling tank and configured to guide the acid solution circulated in the pickling tank by the acid-solution circulation device to the heat exchanger.
    Type: Application
    Filed: February 22, 2017
    Publication date: September 13, 2018
    Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.
    Inventors: Ryusuke NAKATSUKA, Kosei TSUJI, Hideaki SUEMORI, Koichi NAKAMURA