Folding sliding doors

Claim 1

A FOLDING SLIDING DOOR OF THE TYPE INCLUDING A PLURALITY OF SLATS WITH ADJACENT VERTICAL EDGES OF THE SLATS HINGED TO EACH OTHER BY MEANS OF A VERTICALLY EXTENDING FLEXIBLE STRIP OF PLASTIC FORMED AS A WEB HAVING A BEAD ON EACH OF ITS LONGITUDINAL EDGES, EACH BEAD BEING INSERTED INTO A MORTISE IN THE CORRESPONDING ADJACENT SLAT, THE BEAD AND MORTISE BEING OF CIRCULAR SHAPE AND CROSS SECTIONAL PROFILE, WITH THE IMPROVEMENTS COM PRISING: THE BEADS BEING OF LESSER DIAMETER THAN THE MORTISES SO THAT THE BEAD IS FREELY ROTATABLE IN THE MORTISE, A SLIT OPENING FROM THE MORTISE TO THE EDGE OF THE SLAT THE MORTISE IS IN, THE SLIT BEING OF GREATER DIMENSION THAN THE THICKNESS OF THE WEB OF THE STRIP INTERCONNECTING THE BEADS, BUT THE WEB BEING OF LESSER DIMENSION THAN THE DIAMETER OF THE BEADS, EACH BEAD BEING FREELY ROTATABLE IN ITS ASSOCIATED MORTISE THROUGH A LIMITED ANGLE LESS THAN THE ANGLE OR ROTATION NECESSARY TO ALLOW FULL OPENING OR CLOSING OF THE DOOR WITHOUT FLEXING OF THE STRIP, SO THAT A NOW-FLEXING HINGE IS PROVIDED BETWEEN EACH SLAT, THE EDGE OF THE MORTISE ABUTTING THE WEB OF THE INTERCONNECTING STRIP AND FLEXING SAID STRIP TO PROVIDE A FLEXING HINGE BETWEEN THE PANELS IN THE FULLY OPENED OR CLOSED POSITIONS OF THE DOOR, AND AN EFFECTIVE VERTICAL ABUTMENT CARRIED BY THE SLATS AT THE LOWER END OF THE MORTISE PREVENTING THE STRIP FROM SLIPPING DOWNWARDLY FROM THE MORTISE.