A retractable cover for an architectural opening is described that includes a honeycomb insulating panel wherein each cell of the panel has multiple layers of material formed by embedding tubular cells. In this manner, the retractable cover may be formed that has superior insulating or light blocking...http://www.google.es/patents/US6052966?utm_source=gb-gplus-sharePatente US6052966 - Retractable cover having a panel made from cell-inside-a-cell honeycomb material
Retractable cover having a panel made from cell-inside-a-cell honeycomb material
