Patents Assigned to Wellplast AB
  • Patent number: 12011866
    Abstract: A system for producing a multiple layer material (49), comprising first and second corrugation rolls (14, 15) for providing a corrugated profile (16) having a plurality of crests (47), wherein the system further comprises first and second press rolls (21, 22) for applying a material sheet (19, 20) to crests (47) of the corrugated profile (16), and a plurality of heating members (28) arranged between the press rolls (21, 22) for welding the material sheet (19, 20) to the crests (47) of the corrugated profile (16) to form the multiple layer material (49). A guiding plate (48) is arranged between the corrugation 10 rolls (14, 15) and the heating members (28). The guiding plate (16) is arranged with a profile engaging side (50) having a plurality of crests (52) corresponding to the crests (47) of the corrugated profile (16). A cooling arrangement is provided for cooling the guiding plate (48). A method for producing the multiple layer material (49) is also disclosed.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: June 18, 2024
    Assignee: WELLPLAST AB
    Inventor: Anders Jönzon
  • Patent number: 6939425
    Abstract: Method and device for the manufacture of corrugated material, at least one first plane sheet (19; 20) and one second sheet (16) of plastic material arranged in wave shape being brought together for adhesion to each other and the wave-shaped sheet (16) running over core bars (17, 18). A portion of at least one sheet is heated at abutment against the core bars (17, 18) and the first sheet (19; 20) is brought to abutment against the second sheet (16) for welding the sheets (16; 19, 20) together. First members are arranged for feeding at least the first plane sheet and the second sheet of plastic material running over core bars (17, 18) and second members are arranged for bringing together and adhering the sheets. Heating members (28) are arranged for transferring heat to a portion of at least one sheet (16; 19, 20) abutting against the core bars and including plastic material.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: September 6, 2005
    Assignee: Wellplast AB
    Inventors: Anders Jönsson, Jörgen Ingvarsson, Jacob Volckerts
  • Patent number: D617642
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: June 15, 2010
    Assignee: Wellplast AB
    Inventors: Anders Jonzon, Jacob Volckerts, Jörgen Ingvarsson, Mikael Lars Johan Petersson