Paper bead

Abstract

A corner bead is of the tape-on type, having an elongated metal core strip with a longitudinal arcuate nose and a pair of flanges extending outwardly from the nose at approximately a right angle. A cover strip of paper is bonded to the exterior surface of the core strip, and includes wings which project outwardly beyond the extent of the flanges. The cover strip is formed of a stock paper having high abrasion resistance, tensile strength, and which is dimensionally stable on contact with wet joint compound.

We claim:  
     
         1 . A method for manufacturing a tape-on corner bead, comprising the steps of: 
 providing a strip of a paper of a type having high pick resistance, high tensile strength, and dimensionally stable on contact with wet joint compound; and    bonding the paper strip to an outward face of an elongated core with wings extending outwardly beyond the extent of the core.    
     
     
         2 . The method of  claim 1 , further comprising the step of forming a plurality of spaced apart apertures through at least a portion of said strip.  
     
     
         3 . The method of  claim 2 , wherein the bonding step includes the steps of: 
 applying a continuous stripe of adhesive to one of said paper strip and the core; and    applying pressure to the core and paper strip.    
     
     
         4 . The method of  claim 3 , wherein the bonding step further includes the step of heating the paper to a predetermined temperature prior to the step of applying the adhesive stripe.  
     
     
         5 . The method of  claim 4 , further comprising the steps of: 
 roll forming the core to a preformed shape with a cross-sectional shape that begins to conform to the desired finished cross-sectional shape, prior to the bonding step; and    wherein the step of applying pressure includes passing the core and paper strip through a series of contoured forming rolls to form the core and attached strip into the desired finished cross-sectional shape.    
     
     
         6 . The method of  claim 1 , wherein the core is metal.  
     
     
         7 . A tape-on corner bead for drywall construction, comprising: 
 an elongated core strip having a longitudinal arcuate channel forming a nose, and a pair of flanges extending outwardly from each side of the nose;    a cover strip affixed to an outward face of the core strip, with wings extending beyond the extent of the flanges; and    said cover strip formed of a paper with high pick resistance and high tensile strength, and which is dimensionally stable when in contact with wet joint cement.    
     
     
         8 . The corner bead of  claim 7 , wherein said cover strip is a non-latex-bearing paper.  
     
     
         9 . The corner bead of  claim 7 , wherein said cover strip is neither impregnated, nor coated with a strengthening compound.  
     
     
         10 . The corner bead of  claim 7 , wherein the wings are perforated with a plurality of apertures having diameters of approximately 0.005 to 0.020 inches.  
     
     
         11 . The corner bead of  claim 7 , wherein the core strip is metal.  
     
     
         12 . The corner bead of  claim 11 , wherein the metal is galvanized steel.