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A corner member for locating at right angles spacer strips of a sealed window unit includes a pair of legs at right angles each for extending into an adjacent end of one of the strips. The strips are of the type formed from fiberglass reinforced resin pultrusion defining a slot along the inner surfa

A corner member for locating at right angles spacer strips of a sealed window unit includes a pair of legs at right angles each for extending into an adjacent end of one of the strips. The strips are of the type formed from fiberglass reinforced resin pultrusion defining a slot along the inner surface. To prevent the slot opening when the leg is inserted into the hollow interior of the strip, the leg includes a pair of laterally extending projections for engaging the strip in compression fit only at the junctions between the sides and outer edge of the strip.

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1. A combination of a corner member and spacer strips for use in the manufacture of a sealed window unit comprising a plurality of spacer strips each comprising a hollow elongate body of substantially rectangular cross-section providing two side surfaces for contacting and spacing adjacent surfaces

1. A combination of a corner member and spacer strips for use in the manufacture of a sealed window unit comprising a plurality of spacer strips each comprising a hollow elongate body of substantially rectangular cross-section providing two side surfaces for contacting and spacing adjacent surfaces of glass panes, an outer surface for facing outwardly of the outer edge of the glass panes and an inner surface for facing inwardly toward opposed spacer strips of the sealed window unit, the inner surface having a slot extending along the full length thereof, the corner member comprising a pair of legs arranged right angles, each of the legs being dimensioned so as to be received within the hollow body of one of the spacer strips in a compression fit, the leg and spacer strip being shaped and arranged such that the compression fit is limited to areas of the spacer strip adjacent junctions thereof between the side surfaces and the outer surface whereby the compression fit does not cause opening of the spacer strip at the slot in the inner surface. 2. The combination according to claim 1 wherein each leg includes a pair of lateral projections each for engaging respective one of the areas adjacent said junctions. 3. The combination according to claim 2 wherein the lateral projections are arranged to extend continuously substantially along the full length of the leg. 4. The combination according to claim 2 wherein the lateral projections include side walls converging to a sharpened edge which extends longitudinally of the leg. 5. The combination according to claim 2 wherein the lateral projections are inclined outwardly and downwardly. 6. The combination according to claim 1 wherein the cross-section of the leg is such that it substantially fills the cross-section of the respective strip so as to contact the sides and inner surface in sliding fit. 7. The combination according to claim 2 wherein each strip includes a recess at each junction between a side and the outer surface of co-operating shape to respective one of said lateral projections. 8. The combination according to claim 6 wherein each strip includes a recess at each junction between a side and the outer surface of co-operating shape to respective one of said lateral projections. 9. A combination of a corner member and spacer strips for use in the manufacture of a sealed window unit comprising a plurality of spacer strips each comprising a hollow elongate body of substantially rectangular cross section providing two side surfaces for contacting and spacing adjacent surfaces of glass panes, an outer surface for facing outwardly of the outer edge of the glass panes, a pair of longitudinal junctions each between a respective side surface and the outer surface, and an inner surface for facing inwardly toward opposed spacer strips of the sealed window unit, the inner surface having a slot extending along the full length thereof, the corner member comprising a pair of legs arranged at right angles, each of the legs being dimensioned so as to be received within the hollow body of one of the spacer strips in a compression fit, the leg being shaped and arranged to include in cross section a pair of laterally extending projections, each converging to an edge longitudinal of the leg and spaced outwardly therefrom at a corner thereof so that the edges engage said junctions in compression fit whereby the leg does not cause opening of the spacer strip at the slot in the inner surface. 10. The combination according to claim 9 wherein said junctions of said spacer strips include a recess corresponding in shape to said projection. 11. The combination according to claim 10 wherein the projection and junction are generally V-shaped. 12. The combination according to claim 9 wherein said spacer strip is formed by pultrusion from a glass fibre reinforced material. 13. The combination according to claim 1 wherein said spacer strip is formed by pultrusion from a glass fibre reinforced material.