Adjustable door frame assembly

DETAILED DESCRIPTION The present invention is an adjustable door frame assembly created to fit door openings of different sizes.
The door frame using the technology of co-extruding plastics for the installation in door openings comprises PVC foamed plastics jambs, comer connection metal piece, an L-shaped reinforced metal and co-extruded soft stripes to form a U-shaped frame first and to be joined with the bottom threshold to become a door frame assembly characterized in its selectively adjustable height or width which is achieved by cutting off part of the side jambs, to fit in different door opening preset in various of buildings.
The frame is also designed a U shape groove on its back to interfit the same shape metal material for reinforcement.
In addition, it is co-extruded with soft gaskets for reducing noise and securing airtight quality.
On the same way, its bottom jamb is also co-extruded with soft gasket for water resistant and air-tight purpose, and co-extruded with anti-slide strip for safety.
More over, it increases the height for bottom threshold to enhance the ability of the wind pressure resistance.
Accordingly, it is a principal object of the invention to provide a door frame assembly which may be installed in door openings with different heights or widths through cut-off process on easy cutting structure and materials.
It is another object of the invention to provide a door and frame assembly which utilizes co-extrusion technic to combine the door frame with soft gasket while it is produced, to improve the qualities regarding air-tight water-resistant and anti-slide.
It is a further object of the invention to combine threshold and foot plate together, and to increase the height of threshold for the wind pressure resistance.