Plastic corner bead and trim and method of manufacture
AssigneePhillips Manufacturing Co.
InventorRoland Kunz
Life of this patent
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Abstract
A corner bead includes an elongated strip of plastic material with a central arcuate nose and a pair of flanges extending outwardly from the nose. The outward faces of the flanges have knurling formed thereon, to retain joint compound in place during dressing of the corner. In the preferred form of the invention, the knurling is in the form of diamond-shaped depressions formed uniformly across the length and width of the flange outward faces. The method of forming the knurled surface in the bead includes the step of forming separate depressions in an outer face of a flange of the bead immediately after the extrusion process, prior to the material cooling.
Claims6
A corner bead comprising:
- an elongated strip of extruded plastic material, having a longitudinal arcuate channel forming a nose, and a pair of flanges extending outwardly from each side of the nose;
- each flange having an outward face and a flat, smooth inward face;
- and
- a plurality of separate, independent spaced-apart depressions formed in the outward face of each flange, the depressions extending to a depth less than the thickness of the flange.
Dependencies are inferred from the claim text.