Patents Assigned to Hidaka Engineering Company, Limited
  • Punch and die assembly for use in the production of heat exchanger fins
    Patent number: 4170890
    Abstract: A punch and die assembly for use in the production of heat exchanger fins comprising: a fixed lower tool holder including an ironing punch having the same dimension as a predetermined flanged aperture, and a movable upper tool holder having a die matching said ironing punch, wherein said punch is allowed to displace horizontally and can always be held concentrically to the die without requiring any particular adjustment and whereby uniform products can be continuously obtained.
    Type: Grant
    Filed: July 13, 1978
    Date of Patent: October 16, 1979
    Assignee: Hidaka Engineering Company, Limited
    Inventor: Toyoo Kojima
  • Punch and die assembly for use in the production of heat exchanger fins
    Patent number: 4098108
    Abstract: A punch and die assembly for use in the production of heat exchanger fins comprising: a fixed lower tool holder including an ironing punch having the same dimension as a predetermined flanged aperture, and a movable upper tool holder having a die matching said ironing punch, wherein said punch can always be held concentrically to the die without requiring any particular adjustment and whereby uniform products can be continuously obtained.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: July 4, 1978
    Assignee: Hidaka Engineering Company, Limited
    Inventor: Toyoo Kozima