Sleeve type carton for microwave cooking

A disposable, sleeve-type carton adapted to hold an item of food and assist in browning the exterior thereof when subjected to microwave radiation, said carton being formed from a unitary blank of foldable paperboard coated on at least one surface with a layer of an electrically conductive material, and comprising:

• (a) top and bottom major walls foldably joined to each other by a pair of opposed minor walls to form a tubular structure open at the ends;
• (b) one of said major walls being longer than the other of said major walls and having, inboardly adjacent opposite ends thereof, openings extending therethrough;
• (c) a pair of opposed end walls for closing opposed ends of said tubular structure, each of said end walls including at least one end wall panel foldably joined to an end edge of the other of said major walls and including a lock tab projecting therefrom and adapted to be received within a related opening in said one major wall to provide interlocking engagement between said end walls and said one major wall;
• (d) said bottom major wall being embossed to present a plurality of spaced parallel ribs projecting upwardly therefrom for direct contact with said food item to support said food item a slight distance above an upper surface of said bottom major wall.