Patents Assigned to Signature Hardware, LLC
  • Method of manufacturing a seamless metal clad polystyrene door
    Patent number: 8881404
    Abstract: A method of making a seamless edge, metal clad door having foam or polystyrene core, wherein the seam can be welded by cold metal transfer (CMT) welding without melting the polystyrene. The welded seam is appropriately finished by grinding, if necessary, and painting to produce a door with completely seamless edges. The invention encompasses a seamless edge door manufactured by the disclosed process and equivalents thereof.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: November 11, 2014
    Assignee: Signature Hardware, LLC
    Inventors: Michael T. Dowling, William D. Johnson