Rated fire door core and method of making

Details Rated fire door core and method of making Rated fire door core and method of making

2007-10-09

2007-10-09

Salvatore, Lynda (Department: 1771)

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Coated or impregnated woven, knit, or nonwoven fabric which...

Coating or impregnation provides heat or fire protection

C442S181000, C442S219000, C428S218000, C428S219000, C428S220000

Reexamination Certificate

active

11002779

ABSTRACT:
The present invention teaches that a tightly woven, and strong panel of fiberglass may be impregnated with sodium silicate in order to produce a strong and fire resistant panel. The impregnation may occur by spraying, by rolling or by other means, and the drying process of the sodium silicate occurs after it has been impregnated into the fiberglass panel. The present invention further teaches that a fire door core may be mass produced from fire resistant panels and the core rated for fire safety by a rating agency, thus allowing door manufacturers to produce doors using that core without individually certifying each model of door. The present invention further teaches a method of manufacture of the a sodium silicate building panel, comprising the steps of producing a tightly woven fiberglass panel, impregnating it with sodium silicate, and allowing it to dry.

REFERENCES:
patent: 6844275 (2005-01-01), Yamamoto et al.
patent: 2002/0124904 (2002-09-01), Howland et al.

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