Static structures (e.g. – buildings) – Frangible section or means – Removable corner or internal section
Patent
1981-01-29
1983-08-09
Machado, Reinaldo P.
Static structures (e.g., buildings)
Frangible section or means
Removable corner or internal section
E04C 136
Patent
active
043971237
ABSTRACT:
An improved construction for a horizontally installed drywall board incorporates widthwise extending tear-off strips on the back side of each butt end. When the butt ends of two boards are mated for nailing to a stud, the strips are removed which allows the butt ends to bend at the join line to form a depression for receiving the finishing joint cement. A pair of relatively short lengthwise extending tapered tear strips are also provided on opposite corners adjacent one edge of the board and which are also removed to facilitate continuation of the depression along the join line when the board edges are nailed to a stud plate adjacent the ceiling or floor of the room being covered by the wallboard. An alternative embodiment utilizes a tapered construction on the butt ends on the back face of the board and a convention tapered construction on the outer face of the board along its long edges.
REFERENCES:
patent: 1672099 (1928-06-01), Schumacher
patent: 2305247 (1942-12-01), Fisher
patent: 2314523 (1943-03-01), Speer
patent: 3576091 (1971-04-01), Shull
patent: 4237669 (1980-12-01), Hunter
Chin-Shue Alvin
Machado Reinaldo P.
Olive B. B.
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