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US 4,554,718 AGranted
Method of reinforcing a ceiling runner
AssigneeArmstrong World Industries, Inc.
InventorsJames C. Ollinger, Melvin H. Shaub
Life of this patent
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Abstract
A method is provided for adding strength to a T-bar grid fabricated with a double web and capped system. The addition of strength is achieved by coating the inside portions of the T-bar with a hot melt adhesive. Cooling sets the adhesive and results in the parts of the grid member becoming a unitized structure.
Claims2
The method of making a ceiling runner comprising the steps of:
- (a) forming an inverted T-shaped runner from one piece of metal with the metal folded in half to form two parts of a vertical web and two horizontal flanges at the base of the web with one horizontal flange disposed perpendicularly on each side of the vertical web,
- (b) applying a strip of metal to the underside of both horizontal flanges with the sides of the strip of metal extending beyond the edges of the horizontal flanges,
- (c) wrapping each side of the strip of metal around and slightly over each edge of the horizontal flanges whereby the bottom and edges of the horizontal flanges are encased in the strip of metal, and
- (d) the improvement comprising the step of:
- (1) applying an adhesive material to the interface of the two parts of the vertical web just prior to the time the two parts are placed in contact and held in position by the strip of metal wrapped around the edges of the horizontal flanges.
2 more elements
Dependencies are inferred from the claim text.