The patent offered concerns the  opening and closing of window covering products. The mechanism can be applied to a variety of window covering products such as screens, curtains, shutters, vertical blinds. Potential solutions are also to be found in horizontal outside blinds.

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The effect of the mechanism is that  windowcovering products do not fold at the moving side when folding together but at the non moving opposite side. Also the mechanism keeps the suspension points of the windowcovering elements at a fixed distance when the windowcovering is folded open.

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The mechanism consists of a single pressure die casted chain consisting of elements which are connected by living hinges.

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