Patent ID: 7287811

Claim:
An assembly for covering an opening, comprising a winding tube, a reversing member and a movable cover having a first flexible cover part that can be wound on or off the winding tube, a second rigid cover part attached to the first cover part at the end of latter remote from the winding tube and a third flexible cover part attached to the second cover part at the end of latter remote from the first cover part, wherein the free end of the third cover part extends around the reversing member which is movable by a first driving member, which free end is connected to a second driving member, and wherein the ratio between the winding velocity V 1 of the winding tube, and thus the first and second cover parts, the driving velocity V 2 of the first driving member and the driving velocity V 3 of the second driving member is such, that V 1 +V 3 =2 V 2 , where V 3 >V 2 >V 1 >0.