Patents Assigned to We Plan Company
  • Ironing dies
    Patent number: 6860134
    Abstract: In press forming including ironing, an elastically deformable material is used for a part of ironing die contacting to the work material under a higher pressure than designed, for taking the formed product out from the die easily in a case that the ironing die and the formed product are very close in size to each other, and thereby improving the efficiency of production.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: March 1, 2005
    Assignees: Riken, Gunma Prefecture, We Plan Company
    Inventors: Kunio Miyauchi, Takayuki Aoki, Ichiro Takahashi
  • Ironing-deep drawing process
    Patent number: 6755068
    Abstract: A simultaneous two-sided iron-deep drawing process for producing vessels such as metal cans. After being used, the cans can easily be squashed. A difference in height between the inner die and the outer die or the profile radii of the two dies are varied so as to change the longitudinal wall strength of the vessel. The work material is held between the two dies so that both sides are simultaneously ironed and thereby a tubular structure is obtained.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: June 29, 2004
    Assignees: Riken, Gunma Prefecture, We Plan Company
    Inventors: Kunio Miyauchi, Takayuki Aoki, Ichiro Takahashi
  • Tensile testing machine for variously cross sectional materials
    Patent number: 6612189
    Abstract: In order to provide a tensile testing machine of variously cross-sectioned materials which has a very concise structure to make possible more accurate measurement of tensile force, the testing machine is equipped with two roll stands which have gripping rolls available gripping variously cross-sectioned specimens. One or both of the roll stands are hanging. The machine is also equipped with a device for giving a certain initial load to the load cells placed between the roll stands, if necessary.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: September 2, 2003
    Assignee: WE Plan Company
    Inventor: Kunio Miyauchi