US Patent 7111661 Quick-action rolling shutter door

A quick-action rolling shutter door and modules thereof used for closing openings in the walls of warehouses or factory buildings in order to restrict the loss of energy from heated or cooled rooms, and to protect the environment by keeping escaping noise, odors and dust emissions to a minimum. A flexible quick-action rolling shutter door hanging (12) can be wound up onto a roller, is guided on at least one side by a guiding device, and has at least one thick-walled insulating layer (36, 38) consisting of plastic foam material.