Sealable curtain

摘要

A rollup closure utilizes a flexible cover or curtain selected from a material suitable to effect the type closure sought such as against light, ventilation, noise, sound or moisture. The cover is at least as wide as the opening to be covered and is longer than the opening is high. Each lateral margin of the cover has a strip of closure material affixed thereto, and a complimentary strip is affixed to the inside of a channel member. The top of the curtain is rigidly affixed across the top of the opening. The bottom of the curtain is upturned and connected to a driven take up roller mounted atop the opening. An elongated rod is supported within the upturned end of the curtain with its ends captured within the channels on each side of the opening. A weighting rod is supported atop the elongated rod and separated therefrom by the upturned end of the curtain, with the ends of the weighting rod also captured in the lateral channels. Activation of the driven roller lengthens or shortens the effective length of the curtain and moves the rods upwardly within the channels such that the mating closures are positioned to seal and unseal the curtain to the channel. Alternative embodiments may have multiple layers of curtain material or various sealing arrangements incorporated.