Robert E Howlett

US Patent:

48768375, Oct 31, 1989

Filed:

Aug 22, 1988

Appl. No.:

7/234810

Inventors:

Patrick M. Kelly - Cleveland OH
Robert E. Howlett - Middleburg Heights OH
Paul A. Pomeroy - Spencer OH
Dennis A. Alvarez - Euclid OH

Assignee:

USG Interiors, Inc. - Chicago IL

International Classification:

E04B 200
E04F 1306

US Classification:

52287

Abstract:

A drywall corner bead providing a rounded nose and two mounting flanges extending from opposite sides of the nose is formed from a strip of galvanized metal of uniform thickness. The two flanges are provided with three discrete longitudinally extending bands of reduced thickness formed by shear deformation of the material forming the band. The flanges are knurled to emboss the surface thereof and openings are formed in the flanges at intervals along their length. The corner bead is formed by a method in which shear deforming forces are progressively applied to the material forming the thinned bands to produce lateral deformation of such material without any appreciable lengthwise deformation. After the thinned bands are formed, forces are applied to straighten the corner bead. Subsequently, the flanges are knurled to provide an embossed surface and holes are punched in the flanges at intervals along their length.