Patent ID: 8561665

Claim:
A window covering comprising: a headrail; a bottom rail, the bottom rail having a top and a bottom; a middle rail positioned between the headrail and the bottom rail, the middle rail having a top and a bottom; window covering material positioned between the middle rail and the bottom rail, the window covering material moveable from a retracted position to an extended position; a first set of lift cords extending from the headrail to the middle rail, the first set of lift cords extendable between the headrail and the middle rail to a predetermined distance, the predetermined distance defining a lowermost position of the middle rail relative to the headrail, the first set of lift cords retractable to a wound position for defining an uppermost position of the middle rail, the lowermost position of the middle rail being a lowest position in which the middle rail is moveable, such that the middle rail cannot move beyond the predetermined distance; a second set of lift cords extending from the headrail to the bottom rail; the predetermined distance about which the first set of lift cords is extendable being determined such that a distance between the middle rail and headrail when the middle rail is in the lowermost position of the middle rail is less than a distance between the bottom of the middle rail when the middle rail is in the uppermost position of the middle rail and the top of the bottom rail when the bottom rail is in a lowermost position of the bottom rail.