FIRE DOOR, FIRE DOOR LEAF (VERSIONS) Russian patent published in 2009 - IPC E06B5/16 

FIELD: construction.

SUBSTANCE: invention relates to construction and, particularly to fire-proof doors. Fire door consists of a door leaf and door frame. The door leaf includes wooden framework, main panel and outer lining. There is a thermo-setting material between the main panel and framework. The main panel is manufactured from wood-chip board. The outer lining contains two layers on each side of the main panel. Both layers are produced from wood-fiber plate. The said layers are interconnected and coupled with the main panel by means of adhesive material. Two parallel grooves are made in door frame perimetre at the side of door leaf ends. One groove is shifted to the front side of door, while the other one is shifted to frame ledge. Thermo-setting sealing is placed in the grooves.

EFFECT: invention allows for increasing fire resistance of door.

3 cl, 5 dwg