Fiberglass mesh faced cornerbead

Abstract

A cornerbead for installation at a drywall outside corner, the cornerbead includes a substrate forming a nose and first and second elongated flanges. A first strip of perforated tape is adhered to the first flange at its exterior surface. The first strip of tape extends longitudinally of the first flange and a portion of the first strip of tape extends past the outer edge of the first flange. A second strip of perforated tape is adhered to the first elongated flange at its interior surface. The second strip of tape extends longitudinally of the first flange. The first strip has a coating of adhesive material on a side that faces towards the first flange and the second strip has a coating of adhesive material on a side that faces away from the first flange.

1 . A cornerbead for installation at a drywall outside corner, the cornerbead comprising: 
 a substrate forming a nose and first and second elongated flanges, each flange having an exterior surface and an interior surface and having an inner edge and an opposing outer edge, each flange joining an opposing side of the nose at the flange's respective inner edge, and the first flange being formed with holes penetrating from the exterior surface to the interior surface,    a strip of apertured tape adhered to the first elongated flange at the exterior surface thereof, the strip of tape extending longitudinally of the first flange and a portion of the strip of tape extending past the outer edge of the first flange, and    a layer of adhesive at the interior surface of the first flange, whereby upon placing the cornerbead at a drywall outside corner the layer of adhesive attaches the cornerbead to the drywall,    and wherein the strip of apertured tape has a coating of adhesive material on a side that faces towards the first flange and the layer of adhesive at the interior surface of the first flange is penetrated by apertures, whereby joint compound that is applied to the first flange over the strip of apertured tape penetrates the apertured tape, the first flange and the layer of adhesive and bonds the cornerbead to the drywall.    
     
     
         2 . A cornerbead according to  claim 1 , wherein the cornerbead further comprises a layer of coatable material on areas of the substrate's exterior surface not covered by the first strip of tape, and the layer of coatable material provides an improved surface for retaining paint compared to said exterior surface.  
     
     
         3 . A cornerbead according to  claim 2 , wherein the substrate comprises vinyl plastic and the coatable material comprises a polyurethane foam.  
     
     
         4 . A cornerbead according to  claim 1 , wherein said strip of apertured tape is a strip of self-adhesive fiberglass mesh tape.  
     
     
         5 . A cornerbead according to  claim 1 , wherein said strip of apertured tape is a first strip of apertured tape, the cornerbead further comprises a second strip of apertured tape adhered to the first elongated flange at the interior surface thereof, the second strip of tape extending longitudinally of the first flange, and said layer of adhesive is a coating of adhesive material on a side of the second strip that faces away from the first flange.  
     
     
         6 . A cornerbead according to  claim 5 , wherein the second flange is formed with holes penetrating from the exterior surface of the second flange to the interior surface thereof.  
     
     
         7 . A cornerbead according to  claim 6 , comprising: 
 a third strip of apertured tape adhered to the second elongated flange at the interior surface thereof, the third strip of tape extending longitudinally of the second flange and a portion of the third strip of tape extending past the outer edge of the second flange, and    a fourth strip of apertured tape adhered to the second elongated flange at the exterior surface thereof, the fourth strip of tape extending longitudinally of the second flange and a portion of the fourth strip of tape extending past the outer edge of the second flange,    and wherein the third strip has a coating of adhesive material on a side that faces away from the second flange and the fourth strip has a coating of adhesive material on a side that faces towards the second flange.    
     
     
         8 . A cornerbead according to  claim 7 , wherein the substrate comprises plastic material, the cornerbead further comprises a layer of coatable material on areas of the substrate's exterior surface not covered by the second and fourth strips of tape, and the layer of coatable material provides an improved surface for retaining paint compared to said exterior surface.  
     
     
         9 . A cornerbead according to  claim 8 , wherein the substrate comprises vinyl plastic and the coatable material comprises a polyurethane foam.  
     
     
         10 . A cornerbead according to  claim 7 , wherein said third and fourth strips of tape are strips of self-adhesive fiberglass mesh tape.  
     
     
         11 . A cornerbead according to  claim 7 , wherein the cornerbead further comprises a layer of paper on areas of the substrate's exterior surface not covered by the second and fourth strips of tape, the substrate comprises acrylic plastic, and the layer of paper provides an improved surface for retaining paint compared to said exterior surface.  
     
     
         12 . A cornerbead according to  claim 1 , wherein the substrate comprises synthetic resin material and the first flange is formed with recesses at its interior surface and the holes in the first flange open into the recesses.  
     
     
         13 . A cornerbead according to  claim 12 , wherein the recesses are grooves that extend longitudinally of the first flange.  
     
     
         14 . A method of manufacturing a self-adhering cornerbead, the method comprising the steps of: 
 forming an elongate substrate of uniform cross-section, said substrate including a nose, a first flange and a second flange, each flange having an exterior surface and an interior surface, and having an inner edge and an outer edge, each flange joining an opposing side of the nose at the flange's respective inner edge, and the first flange being formed with holes penetrating from the exterior surface to the interior surface,    adhering a strip of apertured tape longitudinally along the exterior surface of the first flange such that a portion of the strip extends beyond the outer edge of the first flange, and    applying a layer of adhesive to the interior surface of the first flange, whereby upon placing the cornerbead at a drywall outside corner the layer of adhesive attaches the cornerbead to the drywall,    and wherein the strip of apertured tape has a coating of adhesive material on a side that faces towards the first flange and the layer of adhesive at the interior surface of the first flange is penetrated by apertures, whereby joint compound that is applied to the first flange over the strip of apertured tape penetrates the apertured tape, the first flange and the layer of adhesive and bonds the cornerbead to the drywall.    
     
     
         15 . A method according to  claim 14 , wherein said strip of apertured tape is a first strip of apertured tape, the cornerbead further comprises a second strip of apertured tape adhered to the first elongated flange at the interior surface thereof, the second strip of tape extending longitudinally of the first flange, and said layer of adhesive is a coating of adhesive material on a side of the second strip that faces away from the first flange.  
     
     
         16 . A method according to  claim 14 , wherein the step of adhering the strip of apertured tape to the first flange comprises: 
 passing the first flange through a set of opposing rollers, and    simultaneously passing the strip of tape through the set of opposing rollers,    wherein the opposing rollers exert pressure on the first flange and the strip of tape, causing the strip of tape to adhere to the first flange.    
     
     
         17 . A method according to  claim 16 , wherein the strip of tape comprises a layer of adhesive material on a side of the strip of tape and the opposing pressure from said set of opposing rollers causes the adhesive material to adhere the strip of tape to the first flange.  
     
     
         18 . A method according to  claim 16 , wherein the substrate is made of plastic and the opposing pressure from said set of opposing rollers causes the first strip of tape to be embedded in the first flange.  
     
     
         19 . A method according to  claim 16 , further comprising the step of removeably applying a protective backing to the coating of adhesive material on the side of the first strip of tape that faces said first flange.  
     
     
         20 . A method according to  claim 19 , wherein the step of removeably applying the protective backing comprises the steps of: 
 passing said first strip of tape through a set of opposing rollers, and    simultaneously passing the protective backing through the set of opposing rollers,    wherein the opposing rollers exert opposing pressure on said first strip of tape and the protective backing, causing the protective backing to adhere to said first strip of tape.    
     
     
         21 . A method according to  claim 14 , wherein the substrate is made of plastic and the method further comprises the step of applying a layer of a coatable material to areas of the substrate not covered by the first strip of tape, wherein the layer of coatable material provides an improved surface for retaining paint compared to the plastic substrate's exterior surface.