Heat-and-serve packages for meat products

Claim 1

A COMPACT GENERALLY FLAT HEAT-AND-SERVE PACKAGE OF MEAT PRODUCT COMPRISING A DISPOSABLE OVEN-HEATABLE TRAY FORMED WITH TWO OPPOSING PAIRS OF INTERCONNECTED FOLDABLE SIDES FROM SHEET MATERIAL CAPABLE OF RETAINING MELTED FAT AND GREASY LIQUID, A DEOSIT OF MEAT PRODUCT FROM WHICH FAT OR GREASY LIQUID RENDERS ON HEATING LAID GENERALLY FLATWISE OVER THE BOTTON OF SAID TRAY WITH ONE PAIR OF OPPOSING SIDES THEREOF FOLDED INWARDLY AND DOWNWARDLY ON THE ADJACENT MRGINS OF SAID DEPOSIT AND WITH THE OTHER PAIR OF OPPOSING SIDES THEREOF EXTENDING OUTWARDLY AND UNFOLDED FROM THE ADJACENT MARGINS OF SAID DEPOSIT, SAID TRAY AND CONTENTS BEING FOLDED OR DOUBLED OVER ON ITSELF SO THAT SAID PAIR OF OUTWARDLY EXTENDING UNFOLDED SIDES OVERLIE EACH OTHER IN SUPERPOSED RELATIONSHIP, AND AN ENVELOPE OF DISPOSABLE FILM HAVING AIR, MOISTURE AND GREASE BARRIER OF PROPERTIES SNUGLY ENCLOSING SAID FOLDED TRAY AND ITS CONTENTS SO AS TO RETAIN IT IN A COMPACT GENERALLY FLAT CONDITION WITH SAID PAIR OF OUTWARDLY EXTENDING UNFOLDED SIDES IN SUPERPOSED ENGAGEMENTS, SAID FOLDABLE SIDES BEING ERECTABLE ON REMOVAL OF SAID FILM AND UN-DOUBLING OF SAID TRAY TO FORM A CONTINUOUS UPSTANDING SIDEWALL TRAY BOTTOM, AND THE ADJACENT ENDS OF SAID INTERCONNECTED FOLDABLE SIDES BEING INTERCONNECTED BY FOLDABLE CORNER FORMATIONS WHICH IN FOLDED FLATTENED CONDITION AND WITH SAID ONE PAIR OF OPPOSING SIDES FOLDED INWARDLY AND DOWNWARDLY ON THE ADJACENT MARGINS OF SAID DEPOSIT PROVIDE SAID OPPOSING PAIR OF UNFOLDED OUTWARDLY EXTENDING SIDES WITH BEVELED CORNERS.