Armstrong World Industries, Inc.

Other

Worthington Armstrong Venture

Henry G Stein

Wesley T Bischel

Chester W Hallett

Joan V Greenslade

Gale E Sauer

A cold forming process includes mechanically joining two strips of metal. The process entails two roll passes. The first pass lances and forms short locking areas through both strips of metal. The second pass compresses and flairs the metal at these areas to complete a mechanical interlock. This method can provide a row of closely spaced fastenings at high speed. It is applicable in improving the torsion strength of existing tee grid products. It is also applicable in creating more efficient rollformed shapes by providing a means to use more than one metal strip.

Process for producing rollformed sections

Miniature hollow beams for easy installation onto a conventional inverted T-bar subceiling framework are disclosed. The beams comprise two flat portions adapted to fit snugly against the T-bar rail, the beams having two hooked arms that snap over the edges of the rail and inwardly sloping, downwardly extending sidewalls that provide a decorative V-shaped or U-shaped appearance when sighted from below.

Decorative elements for subceilings

Miniature beams for easy installation onto a conventional inverted T-bar subceiling framework are disclosed. The beams are composed of a flat portion or web adapted to fit snugly against the T-bar rail, the web having two hooked arms that snap over the edges of the rail and a plurality of elements extending from the web that provides a decorative pattern when sighted from below.

Miniature beams for easy installation onto a conventional inverted T-bar subceiling framework are disclosed. The beams comprise a flat portion or web adapted to fit snugly against the T-bar rail, the web having two hooked arms that snap over the edges of the rail and at least one element extending from the web that has a decorative element at the end of its vertical extension.

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Lancaster, PA, United States of America

Henry G Stein