Plastic sheathed window frame

Claim 1

A protected frame device for an opening in a wall having inner and outer sides, comprising: a structural frame in and extending around said opening and attached at the opening edge, said frame comprising a sill, opposite side jambs and a head; a resilient plastic sheath having an inner surface closely embracing said frame at the outer and upper sides of said sill, jambs and head and having edges, the inner edge of the sill sheath extending inwardly beyond the adjacent inner edge of the sill and retained in a rabbet located in a frame member fastened in position at the inner edge of the sill; sheath retaining barbs integral with said sheath extending inwardly of said inner surface; means providing a kerf in said frame receiving and retaining each said barb and thus said sheath in position on said frame, certain of said barbs being located adjacent said edges and a sill barb being located at the top surface of the frame sill inwardly of the outer edge thereof, the side jambs of the frame and the enclosing sheath at these jambs being provided with vertical inwardly extending recesses to receive screen retaining spring pressed strikes, the recesses being greater in vertical extent than the diameter of the strikes in order that the strikes are self-aligning in a vertical direction but retained against substantial movement in a horizontal direction; and a bottom vertical flange on said head embracing sheath integral with the sheath and located between the verticaL extremities of said bottom to serve as a moisture drip locating flange, said head embracing sheath at the top thereof having a drip cap covering the top of the head sheath and extending up along the adjacent surface of the wall with the cap having a downwardly extending flange located forwardly of the vertical front of the head sheath.