초록

A frame member is extruded from a composite material including plastic and wood fiber. A plastic end cap is sonically welded to a cut end of the frame member despite the presence of wood fiber at the interface.

대표청구항 ▼

[ What is claimed is:] [1.] A method of making a frame for a window or door, comprising the steps of:extruding a frame member from a composite material including wood fiber and plastic, the frame member having sidewalls disposed about a hollow interior;cutting the frame member to length, thereby cre

[ What is claimed is:] [1.] A method of making a frame for a window or door, comprising the steps of:extruding a frame member from a composite material including wood fiber and plastic, the frame member having sidewalls disposed about a hollow interior;cutting the frame member to length, thereby creating a cut end;forming a cap to be secured across the cut end;providing a first surface on the cap to span the cut end;disposing at least one energy director on the first surface;providing a second surface on the cap, extending perpendicularly inward from the first surface, to interface with at least one of the sidewalls on the frame member;disposing at least one energy director on the second surface; andsonically welding the cap to the cut end.