Patents by Inventor Katsumi Kojima

Katsumi Kojima 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: 7871230
    Abstract: The mold apparatus has a pair of upper and lower molds being used for forming a score on one side surface of an easy-opening can end fabricated by a laminated metal sheet. The upper mold has a convex part for forming the score, and the cross sectional shape of the convex part at the portion contacting the laminated metal sheet is composed of a curve having a change rate of inclination of 0.08 or smaller to the upper surface of the facing lower mold, or having the curve and a straight line. The formed score has a maximum width of 0.80 mm or smaller.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: January 18, 2011
    Assignee: JFE Steel Corporation
    Inventors: Hiroshi Kubo, Katsumi Kojima, Yasuhide Oshima, Yoshihiko Yasue, Hiroki Iwasa
  • Publication number: 20100310824
    Abstract: There is provided a laminated metal sheet used for making a highly processed two-piece can body which endures harsh conditions such as retort treatment, and a two-piece can body made of the laminated steel sheet. A laminated metal sheet for a two-piece can body, including a metal sheet having a polyester resin film layer on each side of the metal sheet, the polyester resin film layer to be the outside of the can body having a crystallization temperature of 60 to 100° C., and the surface of the polyester resin film layer having a center line surface roughness (Ra) of 0.2 to 1.8 ?m. The polyester resin film layer to be the outside of the can body is preferably composed of 40 to 100% by mass of a resin composed mainly of butylene terephthalate and 0 to 60% by mass of a resin composed mainly of ethylene terephthalate.
    Type: Application
    Filed: February 5, 2009
    Publication date: December 9, 2010
    Applicant: JFE STEEL CORPORATION
    Inventors: Yasuhide Oshima, Masaki Tada, Hiroki Iwasa, Katsumi Kojima, Yoichiro Yamanaka, Yoshihiko Yasue
  • Patent number: 7789261
    Abstract: A open can end of laminated steel sheet has a score formed thereon by a scoring die. The scoring die has a scoring edge having a sectional shape of an inverted triangle. The scoring edge includes a tip formed of a curve having a radius of curvature of 0.2 mm or more and 0.4 mm or less. Two sides sandwiching the tip are tangent to the curve. A function tan ? of an angle of elevation ? of each of the sides with respect to a surface of the can end is 0.3 or more and 1.0 or less. The resultant a can end being an easy open can end.
    Type: Grant
    Filed: November 26, 2004
    Date of Patent: September 7, 2010
    Assignee: JFE Steel Corporation
    Inventors: Hiroshi Kubo, Katsumi Kojima, Hiroki Iwasa
  • Publication number: 20100116832
    Abstract: A steel sheet undergone precipitation strengthening and refinement in crystal grain size by containing at least one element of 0.005% to 0.05% of Nb, 0.005% to 0.05% of Ti, and 0.0005% to 0.005% of B as a chemical composition is produced through continuous annealing. A steel containing at least one element of Nb, Ti, and B is hot rolled, cooled at a cooling rate of 40° C./s or less, and coiled at 550° C. or higher to facilitate precipitation of cementite after recrystallization annealing. As a result, a steel sheet for a can having a tensile strength of 450 to 550 MPa, a total elongation of 20% or more, and a yield elongation of 5% or less is produced.
    Type: Application
    Filed: April 14, 2008
    Publication date: May 13, 2010
    Applicant: JFE STEEL CORPORATION
    Inventors: Yuka Nishihara, Katsumi Kojima, Hiroki Iwasa, Yoshun Yamashita
  • Publication number: 20100096279
    Abstract: A laminated steel sheet used as a raw material has a tensile strength TS after forming at an equivalent strain ?eq of 1.6 is 800 MPa or less and satisfies 0.25?tb/to where tb is a sheet thickness at a fracture surface after fracture and to is a sheet thickness before the fracture. In forming the laminated steel sheets, forming is conducted so as to satisfy the relationships below: 1.5?h/(R?r), 2.8?R/r1, and 1.1?r2/r1 where h: a height from a can bottom to an opening edge portion; r: an outer diameter of a can body; R: a radius of a circular blank before forming having a weight equivalent to a weight of a final formed can body; r1: an outer radius of an opening edge portion; and r2: an outer radius of a bead portion.
    Type: Application
    Filed: December 3, 2007
    Publication date: April 22, 2010
    Applicant: JFE STEEL CORPORATION
    Inventors: Katsumi Kojima, Yuka Nishihara, Yasuhide Oshima, Hiroki Iwasa, Hiroshi Kubo
  • Patent number: 7666487
    Abstract: An easy-open end which comprises a steel sheet and formed on at least one side thereof an about 10-30 mum-thick coating film of a polyester resin having a 50% crystallization time of about 5 minutes or shorter and a coefficient of planar orientation of about 0.04 or lower and which has a groove for cutting which has a cross section having a radius of curvature of about 0.1 to 1 mm; and a laminated steel sheet for use in the easy-open end. This easy-open end can combine suitability for opening and no need of repair even when the residual score thickness is small.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: February 23, 2010
    Assignee: JFE Steel Corporation
    Inventors: Hiroshi Kubo, Katsumi Kojima, Hiroki Iwasa
  • Publication number: 20100025283
    Abstract: Provided is a laminated steel sheet for a can body of a two-piece can, containing a copolyethylene terephthalate resin layer containing at least one member selected from the group consisting of isophthalic acid and cyclohexane dimethanol as a copolymer component in a proportion of 5 to 20 mol % and having a crystallization temperature of 120° C. to 140° C. on at least one side of a steel sheet; and satisfying the following relationships: r1?r, 0.1?r1/R?0.25, and 1.5?h/(R?r)?4, wherein r1 represents the minimum radius of the can body, r represents the maximum radius of the can body, h represents the height of the can body, and R represents the radius of the laminated steel sheet having a circular shape before shaping whose weight is the same as that of the can body. The laminated steel sheet is suitable for a can body of a two-piece can having a high strain level, and can provide a two-piece can body which is free from delamination and breakage of the resin layer.
    Type: Application
    Filed: October 25, 2007
    Publication date: February 4, 2010
    Inventors: Yasuhide Oshima, Hiroki Iwasa, Yoshihiko Yasue, Yuka Nishihara, Katsumi Kojima, Hiroshi Kubo
  • Publication number: 20100000632
    Abstract: A laminated steel sheet for a two-piece can body with a high strain level satisfying the following formulae, the polyester resin layer composing the laminated steel sheet having a center line surface roughness (Ra) of 0.2 ?m to 1.8 ?m: r1?r, 0.1?r1/R?0.25, and 1.5?h/(R?r)?4 wherein h is the height of the two-piece can body, r is the maximum radius, r1 is the minimum radius, and R is the radius of the circular laminated steel sheet before forming having the same weight as the can body.
    Type: Application
    Filed: January 18, 2008
    Publication date: January 7, 2010
    Applicant: JFE STEEL CORPORATION
    Inventors: Yasuhide Oshima, Junichi Kitagawa, Hiroki Iwasa, Katsumi Kojima, Hiroshi Kubo
  • Publication number: 20090217729
    Abstract: We manufacture a two-piece can by the method using a laminated steel sheet as the base material, having the steps of: drawing a cylindrical blank for several times to form a can body in a shape of cylinder integrated with bottom; forming a tapered part extending outward from the can body in the radial direction thereof at the tip of the opening of the can body; applying diametral reduction to the tapered part to the diameter of the can body; and applying diametral reduction to the opening side of the can body to a diameter smaller than the diameter of the can body, while satisfying the formulae (1) and (2) 1.5?h/(R?r)??(1) d/R?0.25??(2) where h is the height from the can bottom to the tip of the opening, R is the circular blank positional radius, r is the radius of the can bottom, and d is the radius of the tip of the opening.
    Type: Application
    Filed: August 10, 2006
    Publication date: September 3, 2009
    Inventors: Katsumi Kojima, Yuka Nishihara, Hiroshi Kubo, Yoshihiko Yasue, Yasuhide Oshima, Hiroki Iwasa
  • Publication number: 20090218250
    Abstract: In a method for producing a two-piece can, a circular disk of a laminated steel sheet having a thermoplastic resin coating layer is subjected to multistage forming to produce a final formed body having a height h, a maximum radius r, and a minimum radius d (the case where r is equal to d is also included). Forming is performed so that the height h, maximum radius r, and minimum radius d of the final formed body satisfy the relationships 0.1?d/R?0.25 and 1.5?h/(R?r)?4 with respect to a radius R of a circular disk before forming whose weight is equal to that the final formed body. At an intermediate stage of forming, a formed body is subjected to heat treatment at a temperature of not less than a melting point of a thermoplastic resin but not more than a temperature 30° C. higher than the melting point.
    Type: Application
    Filed: August 10, 2006
    Publication date: September 3, 2009
    Inventors: Hiroshi Kubo, Katsumi Kojima, Yuka Nishihara, Yoshihiko Yasue, Hiroki Iwasa
  • Publication number: 20090127272
    Abstract: A method for manufacturing a can body for a two-piece can by multistage forming of a circular laminated steel sheet having a radius of R0 includes the steps of producing a form at least one time by using a laminated steel sheet coated with a polyester resin, which has a plane orientation coefficient of 0.06 or less, in such a way that the height h, the maximum radius r, and the minimum radius d of the form satisfy d?r, 0.2?d/R?0.5, and 1.5?h/(R?r)?2.5, where R represents the radius of the laminated steel sheet having a weight equivalent to the weight of a final form; heating the resulting form at least one time at a temperature of 150° C. or higher, and lower than or equal to the melting point of the polyester resin; and working the heat-treated form into a form satisfying d?r, 0.1?d/R?0.25, and 1.5?h/(R?r)?4. This method easily produces a can body for a laminated steel sheet two-piece can at a low cost without occurrence of peeling nor breakage of a resin.
    Type: Application
    Filed: August 10, 2006
    Publication date: May 21, 2009
    Inventors: Hiroshi Kubo, Katsumi Kojima, Yuka Nishihara, Yoshihiko Yasue, Hiroki Iwasa
  • Publication number: 20090104390
    Abstract: The laminated steel sheet for two-piece can satisfies the relation of the height h of the final formed body, the maximum radius r thereof, the minimum radius d thereof, with the radius R of circular disk, before forming, having the same weight to that of the final formed body, as [0.1?d/R?0.25] and [1.5?h/(R?r)?4]. The laminated steel sheet has a polyester resin layer prepared by polycondensation of a dicarboxylic acid component and a diol component. The dicarboxylic component has terephthalic acid as the main ingredient, and the diol component has ethylene glycol and/or butylene glycol as the main ingredient. The quantity of copolymerizing ingredients is ranging from 8 to 16% by mole. The plane orientation factor of the resin is 0.06 or less.
    Type: Application
    Filed: August 10, 2006
    Publication date: April 23, 2009
    Applicant: JFE Steel Corporation
    Inventors: Hiroshi Kubo, Katsumi Kojima, Yuka Nishihara, Yoshihiko Yasue, Hiroki Iwasa
  • Publication number: 20090061133
    Abstract: A two-piece can has sufficient can strength and excellent corrosion resistance and to provide a method for forming the two-piece can easily without generating cracks. The two-piece can uses a laminated steel sheet as the base material and having a can body in a shape of cylinder integrated with bottom. The can body is treated by diametral reduction to become the diameter of opening side thereof smaller than the diameter of can body, and to satisfy the formulae (1) and (2). There is formed a bead at the opening side of the can body, being curled outward from the can at the tip of the opening in a shape of circular arc or vertically long ellipse in cross section, and is further formed a bead having a cross sectional shape of further curled at the tip thereof, an upper bead, and a lower bead: 1.5?h/(R?r)??(1) d/R?0.25??(2) where, h is the height from the can bottom to the tip of the opening, R is the net blank radius, r is the radius of the can bottom, and d is the radius of the tip of the opening.
    Type: Application
    Filed: August 10, 2006
    Publication date: March 5, 2009
    Applicant: JFE Steel Corporation a corporation of Japan
    Inventors: Katsumi Kojima, Yuka Nishihara, Hiroshi Kubo, Yoshihiko Yasue, Yasuhide Oshima, Hiroki Iwasa
  • Publication number: 20090041964
    Abstract: A laminated steel sheet for use in the manufacture of a two-piece can body that satisfies the following three formulae includes a polyester resin layer on at least one side of the steel sheet, the polyester resin layer containing 3% to 30% by volume of dispersed incompatible subphase resin having a glass transition point of 5° C. or less and a cross section aspect ratio of 0.5 or less: d?r; 0.1?d/R?0.25; and 1.5?h/(R?r)?4, wherein R denotes the radius of a circular laminated steel sheet that has the same weight as that of the two-piece can body before processing, h denotes the height of the can body, r denotes the maximum radius of the can body, and d denotes the minimum radius of the can body. A high strain two-piece can, such as a two-piece aerosol can, formed of the laminated steel sheet is free from delamination and breakage of the resin layer.
    Type: Application
    Filed: August 10, 2006
    Publication date: February 12, 2009
    Inventors: Hiroshi Kubo, Katsumi Kojima, Yuka Nishihara, Yoshihiko Yasue, Hiroki Iwasa
  • Publication number: 20070267423
    Abstract: The mold apparatus has a pair of upper and lower molds being used for forming a score on one side surface of an easy-opening can end fabricated by a laminated metal sheet. The upper mold has a convex part for forming the score, and the cross sectional shape of the convex part at the portion contacting the laminated metal sheet is composed of a curve having a change rate of inclination of 0.08 or smaller to the upper surface of the facing lower mold, or having the curve and a straight line. The formed score has a maximum width of 0.80 mm or smaller.
    Type: Application
    Filed: November 22, 2004
    Publication date: November 22, 2007
    Applicant: JFE STEEL CORPORATION
    Inventors: Hiroshi Kubo, Katsumi Kojima, Yasuhide Oshima, Yoshihiko Yasue, Hiroki Iwasa
  • Publication number: 20060228524
    Abstract: An easy-open end which comprises a steel sheet and formed on at least one side thereof an about 10-30 mum-thick coating film of a polyester resin having a 50% crystallization time of about 5 minutes or shorter and a coefficient of planar orientation of about 0.04 or lower and which has a groove for cutting which has a cross section having a radius of curvature of about 0.1 to 1 mm; and a laminated steel sheet for use in the easy-open end. This easy-open end can combine suitability for opening and no need of repair even when the residual score thickness is small.
    Type: Application
    Filed: May 21, 2004
    Publication date: October 12, 2006
    Inventors: Hiroshi Kubo, Katsumi Kojima, Hiroki Iwasa
  • Publication number: 20050067418
    Abstract: A scoring die is employed for forming a score on a laminated steel sheet to make an easy open can end. The scoring die has a scoring edge having a sectional shape of an inverted triangle. The scoring edge includes a tip formed of a curve having a radius of curvature of 0.2 mm or more and 0.4 mm or less. Two sides sandwiching the tip are tangent to the curve. A function tan ? of an angle of elevation ? of each of the sides with respect to a surface of the can end is 0.3 or more and 1.0 or less.
    Type: Application
    Filed: November 26, 2004
    Publication date: March 31, 2005
    Applicant: JFE STEEL CORPORATION
    Inventors: Hiroshi Kubo, Katsumi Kojima, Hiroki Iwasa
  • Patent number: 6313654
    Abstract: An IC chip testing apparatus comprising a chamber 6 having inside it a test stage 8 for testing an IC chip 22, cooling units 60, 62 able to cool the inside of the chamber 6 to a temperature less than ordinary temperature, heating units 60, 62 able to heat the inside of the chamber 6 to return it to ordinary temperature, temperature sensors 72, 74 for detecting the temperature inside the chamber 6, and a temperature controller 70 for controlling the outputs of the cooling units and/or heating units 60, 62 in accordance with the outputs from the temperature sensors. The apparatus not only makes the temperature control stop but also automatically performs ordinary temperature reset processing when an alarm signal of a temperature abnormality inside the chamber is detected. Further, the apparatus automatically performs ordinary temperature reset processing when the time of continuous operation of the device testing apparatus is more than a predetermined time.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: November 6, 2001
    Assignee: Advantest Corporation
    Inventors: Yuichi Nansai, Takao Murayama, Katsumi Kojima
  • Patent number: 6126759
    Abstract: This invention is to provide a steel sheet for 2-piece battery cans, which has excellent formability in DI molding to give thin-walled, side body parts, and, more preferably, a steel sheet for 2-piece battery cans, which, after having been formed into cans, has high mechanical strength and excellent anti-secondary work embrittlement with excellent corrosion resistance. The steel sheet for 2-piece battery cans of the invention contains S and O (where O is the total oxygen content) while satisfying the conditions that S is from 0.005 to 0.015 wt. %, preferably from 0.005 to 0.012 wt. %, that 0 is from 0 to 0.0025 wt. % and that [S/10+O].ltoreq.0.0035 wt. %, preferably [S/10 +0].ltoreq.0.0030 wt. %. More preferably, the steel sheet contains B of from 0.0005 to 0.0015 wt. % while satisfying 0.2.ltoreq.B/N.ltoreq.1.0, or contains either one or both of Cr of being from 0.03 to 0.10 wt. % and Ni of being from 0.01 to 0.10 wt. %, the total of the two being not larger than 0.10 wt. %.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: October 3, 2000
    Assignee: NKK Corporation
    Inventors: Yoshihiro Hosoya, Katsumi Tanikawa, Katsumi Kojima, Takashi Awaya, Hirohide Furuya
  • Patent number: 5865319
    Abstract: An automatic test handler system for automatically supplying IC devices to be tested to an IC tester and sorting the tested IC devices based on the test results. The system includes a testing machine for testing the IC devices by contacting the IC devices with test contactors. Test signals are provided from the IC tester and the resulting signals from the IC devices are received. The testing machine is installed in a test room in which dust, temperature and humidity are controlled in a high degree. A sorting machine is installed outside of the test room for sorting the IC devices that have been tested based on the test results. The sorting machine has a plurality of sort stations for receiving the IC devices based on categories defined in the test results. Tray cassettes hold a plurality of IC trays containing the IC devices, and both the tray cassettes and IC trays are provided with identification numbers.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: February 2, 1999
    Assignee: Advantest Corp.
    Inventors: Hiroshi Okuda, Shin Nemoto, Hisao Hayama, Katsumi Kojima