DOOR LEAF FRAME Russian patent published in 2007 - IPC E06B3/00 

FIELD: building units, particularly door member for doors to be installed in wall openings.

SUBSTANCE: door leaf frame comprises case with cavity, walls and flanges defined by lower, side and central parts. The case parts are connected with each other so that through cavities are created. At least side parts of the case are made as channel members with different flanges. The channel members are provided with walls, lesser and greater flanges and are formed by bending blank panels. The blank is cut from steel sheet. The greater flanges have cuts to partially receive flanges of central case parts.

EFFECT: extended range of technical means for door production.

4 dwg