United States Gypsum Company

Usg Interiors, Inc.

Thomas Gregory Rowland

Peder John Gulbrandsen

James J Lehane, Jr

Ronald Edward Schenck

Donald James Leahy

John Matthew Willi

Steven E Farley

Dale M Shubert

Ronald E Schenck

Embodiments of a system and a method for manufacturing a gypsum board can be used to produce a gypsum board having at least one perforated cover sheet via a cover sheet perforator system. The cover sheet perforator system can include a perforator roller is disposed downstream of a forming station along a machine direction, a roller support frame for rotatably supporting the perforator roller such that its rotational axis extends along the cross-machine direction, and a motor arranged with the perforator roller to rotate the perforator roller about the rotational axis. The drive motor can be adapted to rotate the perforator roller with a tangential speed substantially equal to the line speed to produce a series of perforation holes in an upwardly-facing cover sheet as the gypsum board moves past the perforator roller.

Gypsum board with perforated cover sheet and system and method for manufacturing same

A roll formed sheet metal grid runner, and method of its manufacture, for a suspended ceiling grid having indexing tabs stamped from a central web of the runner profile, the tabs being effective to reliably locate ceiling panels and, when the grid runner is nested with other identical runners in a package, avoid marring of visible surfaces.

Indexing tab for grid runners

Growing community of inventors

North Olmsted, OH, United States of America

Thomas Gregory Rowland