Patent ID: 6092583
Filing Date: 2000-07-25
Classification: E06B

Abstract:
A closure member comprising:an elongated flexible sheet, wherein short edges of the flexible sheet extend generally vertically, long edges of the flexible sheet extend generally horizontally in a longitudinal direction of the closure member, and the flexible sheet is curved to form waves in a horizontal transverse direction; anda drive that causes the transverse waves to travel in the longitudinal direction, wherein the drive is provided withi) holders having vertically projecting ends fixed to the flexible sheet at a plurality of positions set separately, andii) a moving mechanism which causes the holders to reciprocate in the transverse direction such that when each holder translates in a first transverse direction, the holder rotates first in a counterclockwise direction and then in a clockwise direction, and when the holder translates in a second transverse direction, the holder rotates first in a clockwise direction and then in a counterclockwise direction.