Patents Assigned to Duropal-Werk Eberh. Wrede GmbH & Co. Kg
  • Patent number: 4751125
    Abstract: In a composite panel with a core plate (1), a cover plate (2) glued to the upper side of core plate (1), an edge strip glued to an edge (4) of the core plate (1) and a protective sheet (3) or the like glued to the underside of the core plate (1) in which a drip groove (7), running essentially parallel to the edge (4), is provided on the underside of core plate (1) at a certain distance from its edge (4), considerable production simplification and, simultaneously, a considerably improved protection from water drops running in on the underside of the composite panel are attained, by drip groove (7) being put directly into core plate (1), by the cover plate (2) being pulled around to the underside of core plate (1) and/or protective sheet (3) or the like glued to the underside being pulled into drip groove (7) as far as possible and by the area of the drip groove (7) that is not covered by the cover plate (2) and/or protective sheet (2) or the like, including the free edges of the cover plate (2) and/or the prot
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: June 14, 1988
    Assignee: Duropal-Werk Eberh. Wrede GmbH & Co. KG
    Inventor: Helmuth Ofterdinger
  • Patent number: 4748780
    Abstract: A composite panel, with a core member; a cover plate glued to the upper side of the core member, and also a cover plate glued to the lower side; and with an edge strip secured to the rim of the core member. The composite panel substantially avoids dimensional tolerance problems which can arise at the edge strip, and high demands made during technical use, and by designers, can be met by the panel. The edge strip includes two corner strips which extend centrally from the edge strip and which have a width which is precisely, i.e. with negligible tolerance, predetermined. The edge strip also has a central strip. The core member comprises peripheral ledges which extend centrally from the upper and lower sides with precisely predetermined thickness, and an intermediate component arranged between the ledges. The thickness of the peripheral ledges is adapted to the width of the corner strips of the edge strip.
    Type: Grant
    Filed: May 7, 1987
    Date of Patent: June 7, 1988
    Assignee: DUROpal-Werk Eberh. Wrede GmbH & Co. KG
    Inventor: Knud Vinther
  • Patent number: 4663912
    Abstract: A composite panel, with a core member; a cover plate glued to the upper side of the core member, and also a cover plate glued to the lower side; and with an edge strip secured to the rim of the core member. The composite panel substantially avoids dimensional tolerance problems which can arise at the edge strip, and high demands made during technical use, and by designers, can be met by the panel. The edge strip includes two corner strips which extend centrally from the edge strip and which have a width which is precisely, i.e. with negligible tolerance, predetermined. The edge strip also has a central strip. The core member comprises peripheral ledges which extend centrally from the upper and lower sides with precisely predetermined thickness, and an intermediate component arranged between the ledges. The thickness of the peripheral ledges is adapted to the width of the corner strips of the edge strip.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: May 12, 1987
    Assignee: Duropal-Werk Eberh. Wrede GmbH & Co. Kg
    Inventor: Knud Vinther