Roller door with a sealing shutter

摘要

The door has a sealing shutter (20) extending between a rolled part (1A) of an apron (1) and a side (16) of a box window frame (11). The shutter is plated against the part (1A), when pressure in an overpressure chamber is higher than pressure in a zone (Z2) of the frame. A hinge (21) maintains the shutter at a distance from the part (1A). The chamber is in fluid communication with a volume (V1) through openings (16A) in the side (16).