Static structures (e.g. – buildings) – Framing to receive door – doorjamb – or window sash
Reexamination Certificate
2000-02-14
2001-09-04
Stephan, Beth A. (Department: 3635)
Static structures (e.g., buildings)
Framing to receive door, doorjamb, or window sash
C052S217000, C052S443000, C052S656400, C052S656700, C049S505000
Reexamination Certificate
active
06282851
ABSTRACT:
The present invention relates to door frames and more particularly to a metal section for use as the door jamb and door head of a frame and which simplifies the installation of the frame.
Conventionally, door frames used in domestic dwellings and similar constructions comprising walls lined with plasterboard sheeting are secured to studs defining the door opening. The inside faces of the door jambs and door head of the frame abut against the edges of plasterboard sheeting on the wall within which the door opening is formed and the joint between the plasterboard and door frame is concealed by architrave applied to the door frame and overlapping the adjacent part of the plasterboard. The architrave is applied at both sides of the door frame and is installed by being cut to size, mitred, and then nailed to the door frame. Subsequently, the nail holes have to be filled, and the architrave primed and painted.
The present invention relates to a door frame which obviates the need for an architrave and hence leads to a reduction in the cost of installing the door frame.
According to the present invention, there is provided a door frame comprising opposed door jambs and a door head, said jambs and said head each being formed from a metal section of channel-shape having a base wall which carries a door stop and opposed side walls of a width such that when the section is applied to a door opening within a wall with plasterboard sheeting on the wall around the opening, the opposed side walls of the section will overlap and lie closely adjacent to the outer surface of the plasterboard with the edge of the plasterboard being concealed with the interior of the section, the opposed side walls being perforated to permit a skim coat of plaster to be applied over the side walls and adjacent part of the plasterboard to conceal the presence of the side walls.
Advantageously, the opposed side walls are offset inwardly relative to the base wall of the section whereby the section provides adjacent the base of each side wall an outwardly projecting lip which defines an edge for the skim coat.
The section may be a one-piece component of fixed width, or alternatively a two-piece component which is adjustable in width.
The invention also provides a metal section for use in forming the door frame defined above, said section being of channel-shape and opposed side walls perforated with a multiplicity of apertures to permit application of the skim coat.
Preferably, a door stop also of channel-section is carried by the base wall of the section. Advantageously, the entire section including the door stop is roll-formed from metal strip.
The invention also provides a method of installing a door frame to a door opening comprising providing door jambs and a door head as defined above, applying the door jambs and door head to studding around the door opening with the opposed side walls overlapping the edge portion of plasterboard around the door opening, and applying a skim coat over the exposed side walls of the jambs and head to conceal the presence of the side walls.
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Glessner Brian E.
Harness & Dickey & Pierce P.L.C.
Stephan Beth A.
LandOfFree
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