Fire door construction
AssigneeCawm-Crete International Limited
InventorWalter A. Goodwin
Life of this patent
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Abstract
This invention discloses a core for a fire-resistant door with wooden stiles and rails forming the peripheral edge and a slab filling the space therebetween comprising a cured mixture of magnesium oxi-chloride with inclusions of fibreglass strands and perlite. Also disclosed is a method of making same in which the wooden stiles and rails form the sides of a mold and the core is formed by pouring a mixture on a flat surface with a non-adhering coating and curing the core in place so that it bonds to the stiles and rails.
Claims9
A core for a fire-resistant door comprising wooden stiles and rails forming the peripheral edges of said core;
- a slab filling the space between the surfaces of and surrounded by said stiles and rails;
- said slab comprising a cured mixture of magnesium oxy-chloride containing inclusions of fibreglass strands, and perlite.
A method of making a fire-resistant door core comprising the steps of forming a rectangular frame of stiles and rails;
- fastening a sheet of planar material to the underside of said frame to provide a bottom to a mold formed by the cavity surrounded by said frame stiles and rails;
- pouring a mixture of material curable to form a core slab in the cavity formed by said frame;
- allowing said material to cure and bond to said stiles and rails to form an inner panel.
Dependencies are inferred from the claim text.