(57) A window covering assembly having first and second rails adapted to be secured to
first and second sides of a window frame, at least one resiliently tensionable cable
member (16) extending between the first and second rails, a flexible covering material
(14) being supported and guided by the tensionable cable members between extended
and contracted conditions of material. Tensioning means (18) are provided to tension
the cable members (16), the tensioning means comprising a slider (18) manually longitudinally
slidable along one of said rails, to which said at least one cable member (16) is
attached, and a clamp, preferably a self-locking clamp formed on said slider to clamp
the slider at a desired location on the second rail (12).
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