Snap door for closing structural openings of building, includes curtain with two screens that delimit air cushion, and two transversal tightening bars connected on screens of curtain

摘要

The door has a curtain (10) constituted of two screens (11a, 11b) that delimit an air cushion. The curtain is suspended at the level of a top zone of two lateral jambs. The curtain has two pulling straps (20) connecting a lower part of the curtain with a shaft (21) mounted at the level of a case (3). Two transversal tightening bars are connected on each screen.