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A casement type window is composed of a frame and sash which are independently made, each comprising a unitary prefabricated synthetic plastic shell having bonded therein a wooden frame which faces interiorly of the building wherein the window is mounted. Synthetic plastic elements of the frame or s

A casement type window is composed of a frame and sash which are independently made, each comprising a unitary prefabricated synthetic plastic shell having bonded therein a wooden frame which faces interiorly of the building wherein the window is mounted. Synthetic plastic elements of the frame or sash are accurately associated and brought together under pressure at mitered corner abutment joints which are heat fused to form an integral self supporting member before being united with their wooden frame components.

대표청구항 ▼

A composite window frame subassembly for supporting a sash in a building opening comprising (a) a prefabricated unitary rectangular annular synthetic plastic shell having substantially the same cross section on all sides and including substantially parallel rearwardly extending flange portions defin

A composite window frame subassembly for supporting a sash in a building opening comprising (a) a prefabricated unitary rectangular annular synthetic plastic shell having substantially the same cross section on all sides and including substantially parallel rearwardly extending flange portions defining a continuous rearwardly open channel, (b) said plastic shell comprising top, bottom and side portions having miter joints welded together at all corners thereof to form an integral four-sided unit independently of the remainder of said assembly, (c) a wooden frame complementary in shape and dimensions to said shell and including a forward portion received with said channel in secured relation with said shell and a rearward portion extending beyond said shell, whereby when said subassembly is installed in a wall, the outer side thereof is clad with protective plastic while the inner side presents substantially only wooden surfaces for finishing, (d) said frame forward portion being proportioned to be received within said shell channel by direct relative movement of said frame and shell toward each other, (e) said plastic shell including wall and web portions defining a structure of closed hollow cross section including a nose portion proportioned to project forwardly of a wall wherein said frame is mounted and flange portions projecting in spaced parallel relation from said hollow section to define said channel, (f) said wooden frame including jamb elements secured together at the corners of said subassembly including a forward edge portion received within said channel, and (g) the peripherally inner of said flange portions including a further flange portion extending at right angles thereto and having an integral flexible lip portion extending therefrom in inwardly overlying relation with said inner flange portion in position for sealing engagement by the associated sash.