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.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation-in-part of co-pending patent application Ser. No. 11 / 116,991 filed Apr. 27, 2005, the entire disclosure of which is hereby incorporated herein by reference for all purposes, and claims benefit of U.S. Provisional Application No. 60 / 565,904 filed on Apr. 27, 2004, the entire disclosure of which is hereby incorporated herein by reference for all purposes.BACKGROUND OF THE INVENTION [0002] In building construction, interior walls are generally formed by attaching preformed sheets of gypsum wallboard to a supporting frame. These sheets of wallboard are susceptible to damage, especially at outside corners. In order to protect an outside corner of a wall, a cornerbead is often installed on the corner prior to painting. A conventional cornerbead is typically a thin, elongate strip of metal or plastic with a right angle bend along the strip's longitudinal axis. The right angle bend forms a nose and two flanges extend from...

AI Technical Summary

Problems solved by technology

These sheets of wallboard are susceptible to damage, especially at outside corners.

This process is very time consuming and must be repeated many times in a typical new construction project.

Accordingly, the joint compound, when dried, is prone to cracking along the outer edge of the flange.

Cracking of drywall joint compound along the outer edge of the flange of a cornerbead is a significant problem for drywall installation and offsets many of the gains that have been made in use of alternative materials, such as plastic rather than metal, and alternative attachment techniques, such as adhesive rather than nails.

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