Patent ID: 8672014

Claim:
Device with a curtain ( 2 ) that can be rolled up and unrolled between a shut position and an open position, wherein the curtain ( 2 ) has lateral edges ( 3 ) and opposing faces and comprising, near the lateral edges ( 3 ) on each opposing face, a serrated belt ( 1 , 6 ) extending parallel to said lateral edges ( 3 ), wherein each of the serrated belts ( 1 , 6 ) has successive teeth ( 5 , 8 ) along a longitudinal direction of the lateral edges ( 3 ), and a lateral face of each of the teeth is extending in the longitudinal direction of the lateral edges ( 3 ), wherein said lateral face of the teeth of at least one of the belts ( 1 , 6 ) provided on a first of said opposing faces of the curtain ( 2 ) bears against a supporting element when the curtain ( 2 ) is rolled up, wherein said supporting element is provided on a second of said opposing faces of the curtain ( 2 ) and wherein the curtain extends along a plane in the open position, wherein the successive teeth of each of the belts interlock along the longitudinal direction of the lateral edges when the curtain is rolled up, the lateral face of the teeth is perpendicular to the plane of the curtain, and wherein the supporting element directly extends from one of the serrated belts.