Tray-type processed food containers

One-piece tray construction for processed food containers including light gauge sheet metal, bottom, side and end walls forming a generally rectangular tray;

• the tray having an outer surface and an inner surface provided with a protective coating;
• the side and end walls being connected by curved corner walls;
• an outturned continuous ledge formed at the upper ends of the side, end and curved corner walls;
• said side, end and curved corner walls tapering upward outward between the bottom wall and ledge;
• second side, end and curved corner walls offset laterally outward of the first mentioned side, end and curved corner walls extending upward from the perimeter of the ledge and forming the upper open end of the tray;
• said second walls having an outturned continuous terminal bead-forming flange at the open end of the tray;
• each second curved corner wall having a smaller radius of curvature than that of any of the first mentioned curved corner walls to provide widened ledge portions at end corner of the tray;
• horizontally oriented corrugation means embossed outwardly in each of said second curved corner walls;
• and said corner corrugation means being adapted to engage and be supported on the outturned terminal beadforming flange of a tray next below when a series of trays are stacked in nested condition, with the outer surfaces of the first mentioned side, end and curved corner walls of adjacent trays in the nested stack being spaced from the inner protective coated surfaces of the trays next below.