Patent ID: 8413378

Claim:
A shutter comprising a frame having side members and top and bottom frame members, and a plurality of louvres mounted between the side members said louvres including top and bottom louvres and intermediate louvres; a control for tilting the louvres between open and closed positions; seal support formations on said top and bottom frame members; top and bottom swingable seals each swingably supported on a respective one of said top and bottom frame members; each of said seals including a seal root portion which is received by a respective one of said support formations; each of said root portions including a pair of side walls each defining a generally concave semi-arcuate bearing surface and a cross member extending between said side walls, and enclosing a hollow interior; each of said cross members being generally planar with beveled edges and, with a respective said pair of side walls, each of said seals including a flexible resilient louvre contact portion oriented to contact a respective one of said top and bottom louvres said seal support, formations swingably engaging said bearing surfaces, the seals being swingable relative to said top and bottom frame members to allow sealing contact between each of said contact portions and said respective one of said top and bottom louvres when the louvres are in said closed position, each of said seals defining a generally triangular shape in cross section; said seal support formations and said bearing surfaces being complementary, and ensure that said top and bottom seals remain vertically oriented when not engaged by said respective one of said and bottom louvres.