Patent ID: 6962188

Claim:
Flexible shutter system combined with a drive system in such a way as to permit the shutter ( 1 ) to move vertically between a closed position and an open position, said shutter ( 1 ) being intended to close an opening ( 5 ) or other aperture, wherein the shutter ( 1 ) has at least one area of low resistance ( 11 ), to allow at least one access aperture to be created when the shutter ( 1 ) is broken at the location of said area of low resistance ( 11 ), wherein the area of low resistance ( 11 ) contains at least two tapes ( 42 , 43 ) which are engageable with each other by least one slider ( 49 , 50 , 51 ), whereby at least one point of commencement ( 44 ) of breakage of the area of low resistance ( 11 ) is provided where the tapes ( 42 , 43 ) cannot interlock over a certain part of their length.