Fire door construction

Details Fire door construction Fire door construction

1981-08-27

1982-12-21

Dixon, Jr., William R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Edge feature

52404, 52601, 52809, 264112, 264219, 264256, 264333, 428 71, 428 74, 428 68, 4283179, B32B 2302, E04C 234, E04B 174, B28B 116

Patent

active

043649874

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.

REFERENCES:
patent: 3153817 (1964-10-01), Pease, Jr.
patent: 3590111 (1971-06-01), Gebefugi
patent: 3625808 (1971-12-01), Martin
patent: 4104828 (1978-08-01), Naslund et al.
patent: 4147004 (1979-04-01), Day et al.
patent: 4159302 (1979-06-01), Greve et al.
patent: 4185066 (1980-01-01), Temple
patent: 4186536 (1980-02-01), Piazza
patent: 4238544 (1980-12-01), Mullet

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