Bed board and back rest

Claim 1

IN A BED BOARD AND SEAT BACK REST STRUCTURE, A PAIR OF FLAT SUBSTANTIALLY STIFF FRAME SECTIONS ARRANGED EDGE TO EDGE WITH ADJACENT EDGES PROVIDED WITH L-SHAPED HINGE CONNECTIONS ACCOMMODATING UNFOLDING MOVEMENT OF THE SECTIONS TO A HORIZONTAL COPLANAR ALIGNMENT, EACH OF SAID HINGE CONNECTIONS INCLUDING A LONG LEG APPLIED TO ONE FACE OF THE SECTION AND A SHORT LEG WITH KNUCKLE-FORMING ELEMENTS PROJECTING NORMALLY FROM THE OTHER FACE OF THE COPLANAR SECTIONS AND PINNED TOGETHER AND ENGAGEABLE WITH EACH OTHER ADJACENT THE PINS TO LIMIT UNFOLDING MOVEMENT OF THE SECTIONS TO THE COPLANAR ALIGNMENT, THE SECTIONS BEING FOLDABLE ABOUT THE HINGE CONNECTIONS AND POSITIONABLE COEXTENSIVELY ONE ABOVE THE OTHER WITH SAID KNUCKLE-FORMING ELEMENTS HOLDING THE SECTIONS SPACED APART AT THE HINGE CONNECTIONS, INDIVIDUAL CUSHIONS ASSEM-