At the center of the patent debate is the sandwich's sealed edge. The attorneys' brief says that "this smashed edge is the antithesis of the surface-to-surface seal" formed in its own process. The brief uses sandwich diagrams in an attempt to demonstrate that, unlike pie crusts or ravioli, the sandwiches are made without "commingling the two bread slices into an amorphous homogenous mass." Instead, the slices remain "separately visible about the periphery of the sandwich."