Oven liner for automatic heat cleaning oven

Claim 1

IN COMBINATION A HIGH TEMPERATURE COOKING APPARATUS COMPRISING A CABINET STRUCTURE AND AN OVEN LINER HAVING WALLS FORMING AN OVEN CAVITY WHERE ONE WALL OF THE CAVITY INCLUDES A DOOR FOR GAINING ACCESS THERETO, HEATING MEANS PROVIDED FOR THE CAVITY FOR BOTH NORMAL COOKING OPERATIONS UP TO A MAXIMUM TEMPERATURE OF ABOUT 550* F. AND AN AUTOMATIC HEAT CLEANING TEMPERATURE UP TO A MAXIMUM OF BETWEEN 750*F. AND 950*F. FOR BURNING OFF THE FOOD SOIL THAT ADHERES TO THE OVEN LINER WALLS, AT LEAST THE BOTTOM WALL OF THE OVEN LINER BEING A FLAT SHEET THAT IS SUBSTANTIALLY COVERED WITH A PLURALITY OF SHALLOW RECESSES WHERE THE BOTTOM WALL OF EACH RECESS IS OF GRADUALLY INCREASING DEPTH INWARDLY OF THE PERIPHERY THEREOF SO THAT FOOD SOIL ACCUMULATING ON THE OVEN LINER WALLS WILL BE SEPARATED INTO A LARGE NUMBER OF SMALL SHALLOW POOLS THAT ARE CLOSELY SPACED TO EACH OTHER WHEREBY THE SOIL SPOTS WILL HAVE A THIN WEDGE-SHAPE PERIPHERY SO AS TO INCREASE THE SPEED OF BURNING AWAY THE FOOD SOIL.