Pizza box carton

Claim 1

A carton comprising a pair of interchangeable, opposed, closure members, each of said closure members comprising a rectilinear base and four side walls disposed at the periphery of said base so as to provide a four-cornered construction being formed with central receptable portion, wherein first two of said walls being formed with lip portions and the second two of said walls being formed with other lip portions, said first two walls being oppositely disposed and said second two walls being oppositely disposed, wherein the lip portions of said first two walls are more outwardly disposed than the lip portions of said second two walls, said corners comprise upwardly-extending lip portions, and wherein said corner portions of one member interfit the corner lip portions of the other member, said corner lip portions of opposed closure members being in abutment, and wherein said corner lip portions extend upwardly about one-half the height of the side lip portions; said interfitting side lip portions and said abutting corner lip portions forming a step at the line of closure of the members at each of the side walls of the carton adjacent the corner, and wherein one step is more upwardly disposed than the other step, whereby the two closure members are interfitted with the lip portions of said first walls interengaging the other lip portions of said second two walls of the opposed closure members.