Patent ID: 8327907

Claim:
A door having a door leaf comprising a plurality of panels which are connected to one another and guided via rollers in guide rails, the guide rails including a vertically-arranged rail section for receiving rollers of the door panels in a closed position, a horizontally-extending rail section for receiving some of the rollers in a raised or opened position, a curved rail section interconnecting the horizontally and vertically-arranged rail sections, a separate guide rail section receiving a topmost roller pair, opening into the curved rail section and corresponding to an arc a panel guided by the topmost roller pair makes with an immediately-following panel upon tilting, such that when the panel guided by the topmost roller pair is initially tilted out of a completely-closed position, the remaining panels including a lowermost panel all remain in a closed position and the lowermost panel is not raised, and an additional separate curved guide rail section branching off from the vertically-arranged section of said guide rail and terminating adjacent a lateral edge of said separate guide rail section for receiving only a bottommost roller pair.