Patent ID: 7828037
Filing Date: 2010-11-09
Classification: E06B

Abstract:
1. An apparatus for opening and closing a portal in a structure, comprising: a) a pair of spaced apart opposing lateral margins defining opposing sides of the portal; b) a flexible curtain having elongated side portions, a first end and a second end each having a dimension commensurate with the separation of said lateral margins, with said first end of said curtain being fixedly attached adjacent the portal along a first end thereof, said second end of said curtain folded back on itself to define a pocket opening towards the first end of the portal; c) an elongated rod captured within said pocket; d) varying means operatively connected to said second end of said curtain for varying the height of said pocket; and e) means for magnetically sealing said lateral margins of said portal to said elongated side portions of said curtain; f) wherein said lateral margins of said portal comprise a magnetic material with a smooth and uniform surface and said elongated side portions of said curtain comprise a magnetically interacting material with a smooth and uniform surface, wherein said smooth and uniform surfaces of said magnetic material and said magnetically interacting material are operable to form an air tight seal; and g) wherein said magnetically interacting material is a flexible, thin spring steel strip covered with an adhesive tape that overlaps said spring steel strip and is adhesively secured to said elongated side portions of said curtain.