Paneling for elevator cabs

Claim 1

A PANEL FOR AN ELEVATOR CAB COMPRISING A SUBSTANTIALLY RIGID BOARD HAVING A RECTANGULAR SHAPE WITH FOUR EDGES AND FRONT SURFACE, A METAL FRAME OF METAL STRIPS EXTENDING ALONG A RESPECTIVE EDGE DEFINING AN OPENING AT SAID FRONT SURFACE, EACH OF SAID STRIPS HAVING A CENTER PIECE AND REAR AND FRONT PIECES FORMING A U-SHAPE, SAID REAR PIECES BEING DETACHABLY SECURED TO THE REAR OF SAID BOARD AND SAID CENTER PIECE SPACING SAID FRONT PIECES FROM SAID BOARD TO FORM A STORAGE GROOVE AND SPACE BETWEEN SAID OPENING AND FRONT SURFACE FOR A PLURALITY OF SHEETS, ONE OF SAID STRIPS ALONG AN EDGE BEING REMOVABLE FOR INSERTION OF SHEETS, SHEETS OF LESS THICKNESS THAN SAID BOARD AND SUBSTANTIALLY COEXTENSIVE THEREWITH AND POSITIONED IN SAID GROOVE AND STORAGE SPACE BY REMOVAL OF SAID STRIP, SAID METAL STRIPS FIRMLY HOLDING SAID SHEETS IN FLAT LAYER RELATION AGAINST SAID BOARD WITH THE FRONT PIECE AT SAID OPENING AS AN INTERIOR DECOORATIVE SURFACE WHILE THE OTHER SHEETS ARE STORED BETWEEN SAID FRONT SHEETS AND SAID FORWARD SURFACE OF SAID BOARD IN SAID STORAGE SPACE.