(57) A Window covering for mounting adjacent to a window frame, comprising a fixed upper
head box having opposite ends, an operating mechanism housed in the head box, lateral
guides each at one of the opposite ends of the head box to coextend with opposite
lateral sides of a window frame, a flexible covering member, and a retraction mechanism
for the flexible covering member having opposite ends extending between the lateral
guides and opposite ends of the retraction mechanism being vertically slidably engaged
on the lateral guides for travelling movement therealong,wherein the position of the
retraction mechanism along the lateral guides is adjustable.
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