Combination spline groove

Claim 1

In combination with an elongated structural body member (11 inter alia) such as a door stile (11) or window stile, which body member (11) forms at least a portion of a frame (11') over which a screening material (10) is retained, edge portions (10') of the screening material (10) being held within a spline groove (16) formed in the body member (11) by means of a spline strip (17, 18), the improvement comprising: spaced first and second wall members (50, 52) formed in a planar wall (54) of the elongated body member (11), planar inner wall surfaces (56, 58) of the wall member (50, 52) being parallel and being disposed at an angle to an outer planar surface (60) of the planar wall (54), spaced parallel edges (62, 64) of outer ends (66, 68) of the wall members (50, 52) defining an elongated opening (70) therein, the second wall member (52) having a recess (72) formed longitudinally therein, the recess (72) being bounded by two spaced wall surfaces (74, 76), the planes of said wall surfaces (74, 76) near outer portions (78, 80) thereof being parallel and perpendicularly intersecting the plane of the inner wall surface (58) of the second wall member (52) to form first and second lateral edges (82, 84), the recess (72) further being bounded at innermost portions (86) thereof by an arcuate wall surface (88) formed essentially by inwardly curving inner portions (90, 92) of the two spaced wall surfaces (74, 76); a recessed wall member (94) joined to inner ends (96, 98) of the first and second wall members (50, 52), the recessed wall member (94) having an arcuate recess (100) formed longitudinally therein, the arcuate recess (100) being bounded along a first lateral edge (102) thereof by a planar wall surface (104) of the recessed wall member (94), the plane of the wall surface (104) being perpendicular to the plane of the inner wall surface (56) of the first wall member (50), a second lateral edge (106) of the arcuate recess (100) being substantially coincidental with the second lateral edge (84) of the recess (72) formed in the second wall member (52), the first and second wall members (50, 52) and the recessed wall member (94) defining the spline groove (16) in the elongated body member (11), the spline groove (16) being capable of receiving into retaining relation with the edge portions (10') of the screening material (10) spline strips (17, 18) of varying axial cross-sectional configuration.