Patents Assigned to Winkler + Dunnbier AG
  • Device and process for forming a matrix cavity
    Patent number: 6105492
    Abstract: A process and device for forming a matrix cavity in the counter die of an embossing punch with an embossing device. The counter die is made of a tough, elastic to hard material such as a thermoplastic. The top die having a raised embossing pattern is pressed onto the counter die, which is heated, to form the matrix cavity.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: August 22, 2000
    Assignee: Winkler + Dunnbier AG
    Inventor: Alfons Fergen