Patent ID: 7730689

Claim:
A window arrangement being configured to reduce flow of air through a window, said window arrangement comprising: a frame; a sheet member comprising a flexible plastic material extending downwardly and retracting upwardly; a roller mechanism disposed to hold said sheet member; said sheet member comprising a first sheet member peripheral edge, a second sheet member peripheral edge, and a third sheet member peripheral edge; said first sheet member peripheral edge comprising mooring holes being disposed in and along the length thereof; said frame comprising a first frame peripheral edge, a second frame peripheral edge, and a third frame peripheral edge; said frame comprising pegs being disposed along said first frame peripheral edge and projecting outwardly from said frame; each of said mooring holes of said sheet member fitting over a corresponding one of said pegs; said pegs fitting into said mooring holes to hold said sheet member in a downwardly extended position; said frame comprising a first folding leaf member, a second folding leaf member, and a third folding leaf member, which first folding leaf member is folding over said frame; said first folding leaf member being disposed adjacent said first frame peripheral edge; said first folding leaf member comprising openings being disposed in and along the length thereof; each of said openings meeting with a corresponding one of said mooring holes and fit over a corresponding one of said pegs; said openings of said first folding leaf member receive and mate with said pegs; and said first folding leaf member clamping said mooring holes of said first sheet member peripheral edge of said sheet member to hold said sheet member in place.