Patent ID: 6138739
Filing Date: 2000-10-31
Classification: E06B

Abstract:
Apparatus for covering and uncovering a portal, comprising in combination:a) a flexible curtain having elongated side portions, and first and second ends each having a dimension commensurate with the separation of lateral margins of the portal, said first end of said curtain being fixedly attached across the portal at a first end thereof, said second end of said curtain being folded back on itself to define a pocket opening toward said first end of said curtain;b) an elongated rod captured within said pocket;c) means attached adjacent said lateral margins for holding opposing ends of said rod therein such that said rod may travel freely in a direction parallel to the plane of said lateral margins but is substantially prevented from movement normal to the plane of said lateral margins, wherein said holding means comprises surfaces angled towards said lateral margins for engaging said ends of said rod to bias said rod towards said lateral margins; and,d) means for urging said second end of said curtain along a path parallel to the plane of said lateral margins such that said pocket is positioned at selected positions.