Foldable door with hollow double hinge

Claim 1

A FOLDING DOOR ASSEMBLY COMPRISING A PLURALITY OF ELONGATED PANELS DISPOSED IN EDGE-TO-EDGE RELATION, EACH SIDE EDGE OF EACH PANEL HAVING A LONGITUDINAL GROOVE THEREIN, A HINGE STRIP EXTENDING BETWEEN ADJACENT SIDE EDGES OF THE PANELS, SAID HINGE STRIP EXTENDING THROUGHOUT THE LENGTH OF THE PANELS, SAID HINGE STRIP INCLUDING A FLEXIBLE WALL ENGAGING THE EDGES OF THE PANELS, AND A PAIR OF FLANGES PROJECTING FROM THE FALL IN SUBSTANTIALLY PERPENDICULAR RELATION THERETO AND TELESCOPICALLY RECEIVED IN SAID GROOVES, SAID HINGE STRIP ALSO INCLUDING EDGE WALLS FORMED INTEGRAL WITH THE FLEXIBLE WALL AND SPACED FROM EACH OTHER, AN OUTER WALL INTERCONNECTING THE OUTER ENDS OF THE SIDE EDGE WALLS WITH THE OUTER WALL BEING DISPOSED GENERALLY IN PARALLEL SPACED RELATION TO THE FLEXIBLE WALL THEREBY COOPERATING WITH THE EDGE FALLS TO DEFINE A HOLLOW HINGE STRIP WHEREBY THE OUTER WALL WILL BOW OUTWARDLY WHEN THE PORTIONS OF THE FLEXIBLE WALL ENGAGING THE EDGES OF THE PANELS ARE DISPOSED IN ACUTE ANGULAR RELATION TO EACH OTHER.