Patent ID: 6722416
Filing Date: 2004-04-20
Classification: E06B

Abstract:
In a door comprising a flexible curtain closure member having a transverse bottom edge and opposed side edges;spaced apart guide tracks for guiding the side edges of said curtain for movement between open and closed positions of said door; and opposed spaced apart windlock members supported on said curtain adjacent opposite side edges thereof, respectively, and adapted for movement within said guide tracks for retaining said curtain edges in said guide tracks, said windlock members on one of said side edges are configured for response to a predetermined deflection of said curtain to exit one of said guide tracks, and said windlock members on the other of said side edges are configured different from said windlock members on said one side edge to retain said curtain in an opposite one of said guide tracks whereby said curtain is relieved of forces acting thereon by exiting said one of said guide tracks along only said one side edge.