Patents Assigned to Walpat AG
  • Patent number: 4669343
    Abstract: A corner joint between mitered jambs of a door frame, with claws provided in the miter region of the jamb ends. The claws are designed as tongues cut out of the jambs. The tongues are provided with abutment elements which engage behind the respective adjacent jambs. Further, the tongues and their abutment elements are offset relative to each other and so dimensioned that in assembled state, they engage and snugly fit between the tongues of the other jamb. The manufacture and assemblage of the frame jambs is thereby considerably simplified.
    Type: Grant
    Filed: January 10, 1985
    Date of Patent: June 2, 1987
    Assignee: Walpat AG
    Inventor: Christoph Langenhorst
  • Patent number: 4601189
    Abstract: A tool for the mitering of frame members has a lateral shoulder cooperating with a lateral guide for the punch so that a vertical bending edge of the latter deform the trim flange of a profile against a rounded portion of a cutting die on which the profile is supported to form a rounded trim edge, simultaneously with the mitering operation.
    Type: Grant
    Filed: August 9, 1984
    Date of Patent: July 22, 1986
    Assignee: Walpat AG
    Inventor: Christoph Langenhorst