Patent ID: 8439099
Filing Date: 2013-05-14
Classification: E06B,Y10T

Abstract:
1. A dual curtain closure system for covering a portal, comprising: a. first and second pairs of attachment members, wherein said first pair comprises first and second attachment members and said second pair comprises third and fourth attachment members, wherein said first and second pairs of attachment members define lateral margins of the portal, and wherein each of said attachment members has an inner surface substantially parallel to a plane of the portal, said inner surface of said first attachment member substantially facing said inner surface of said second attachment member and said inner surface of said third attachment member substantially facing said inner surface of said fourth attachment member; b. hook fastening material attached to said inner surface of each of said attachment members; c. first and second curtains, wherein the length of each of said curtains is greater than the length of said lateral margins of the portal, wherein each of said curtains has first and second elongated side portions, wherein each of said curtains has a first and second end each having a dimension commensurate with the separation of said pairs of attachment members, wherein each of said curtains has an interior surface and an exterior surface, wherein when said curtains are in a lowered position said interior surfaces of said curtains substantially face one another and said exterior surfaces of said curtains face away from the portal, and wherein said first end of each of said curtains is fixedly attached across the portal at an upper end thereof and said second end of each of said curtains is folded back on itself to define an upwardly opening pocket; d. means for urging said second end of each of said curtains along a vertical path such that the heights of said pockets are adjustable; e. loop fastening material attached to said exterior surface of each of said curtains along each of said elongated side portions, wherein said loop fastening material is complementary to and capable of being secured by said hook fastening material; f. a first elongated rod supported within said pocket of said first curtain, wherein the length of said first rod is approximately at least as great as the distance between said loop fastening material attached to said first elongated side portion of said first curtain and said loop fastening material attached to said second elongated side portion of said first curtain; and g. a second elongated rod supported within said pocket of said second curtain, wherein the length of said second rod is approximately at least as great as the distance between said loop fastening material attached to said first elongated side portion of said second curtain and said loop fastening material attached to said second elongated side portion of said second curtain, and wherein said second rod is maintained at a height greater than said first rod; h. wherein said hook fastening material attached to said inner surface of said second and fourth attachment members has only downwardly facing hook openings to prevent said hook fastening material attached to said inner surface of said second and fourth attachment members from engaging said loop fastening material attached to said exterior surface of said first curtain as said first curtain and said first elongated rod supported within said pocket of said first curtain are lowered.