Patent ID: 8272425

Claim:
Flexible shutter device intended for closing a window or door opening or any type of opening, comprising: a shutter comprising lateral edges, driving means for moving the shutter between an open position and a closed position, the driving means comprising a motor-driven drum and a spindle, the drum rotatable about its spindle, around which the shutter is wound in its open position forming a roll consisting of turns formed by successive layers attached to one another and from which the shutter can be unwound and pushed by rotation of the drum by the motor towards its closed position, slideways mounted on a fixed support for guidance, along the opening, of the lateral edges of the non-wound part of the shutter, the lateral edges being substantially non-compressible, the slideways having a U-shaped cross-section including a rear arm, a front arm and a central part, the central part of which is up against the structure of the opening, the two arms of the U-shaped cross-section of the slideways each being disposed in a plane parallel to the plane of the shutter, characterized in that the device comprises confinement elements comprising an extension of the rear arms of each slideway towards the roll, which consists of a pressure element having a concave curvature with respect to the drum, so as to obtain a radial thrust force resultant that continuously applies the lateral edges of the shutter on the pressure element between a first end of the slideways being closest to the roll, and the roll, and preventing buckling of the lateral edges of the shutter there between, and in that the shutter lacks any ballasting.