Patents Assigned to Presnet Corporation
  • Method of and apparatus for coining tapers at opposite ends of a sleeve member
    Patent number: 5177991
    Abstract: A method of and apparatus for coining tapers at opposite end faces of a sleeve member in which upper and lower punches are displaced relative to upper and lower dies, respectively, before start of a coining operation, to engage the opposite end faces of the sleeve member. Thereafter, the upper die is advanced together with the upper punch to effect coining. The sleeve member is supported at both its opposite end faces during the entire coining operation.
    Type: Grant
    Filed: July 28, 1991
    Date of Patent: January 12, 1993
    Assignee: Presnet Corporation
    Inventor: Reynald Sansoucy