Closure device for windows and doors has concertina-type cover with interconnected movable elements with some held together in common region and some with their front edges not gathered together for smoother movement

摘要

The closure device has a concertina-type cover (16) of which part of the interconnected movable elements (17) is held in a common region (21) preferably by a holder whilst the other elements which are located at the front edge (72) when the cover is fanned out are not gathered at their end (39) facing the common region into this common region. When fanned out the ends (39) of the other elements which remain free are roughly at the same level.