Patents Assigned to Lawson Mardon (MI) Limited
  • Sheet metal forming tool and method
    Patent number: 5205146
    Abstract: There is provided a punch for use in cold forming hollow metal articles in a die without wrinkling. The punch is provided with a head portion composed of resiliently deformable material, such as an elastomer, with cavities located in the head portion to permit controlled collapse of the head portion under transverse forces exerted during a forming operation.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: April 27, 1993
    Assignee: Lawson Mardon (MI) Limited
    Inventors: Nicholas H. Wilkins, Frederick B. M. Page