Patent ID: 7481645

Claim:
A mold apparatus comprising: a cavity having a cavity inner surface; and a gap in communication with the cavity and the exterior of the mold apparatus for venting vapor or steam; wherein the gap comprises a first portion which extends in a substantially continuous manner along the cavity inner surface, wherein the first portion has a width that is in a range from about 0.001 inches to about 0.030inches and a length that is substantially greater than said width; wherein the gap further comprises a second portion in communication with the first portion wherein the second portion is wider than the first portion: and wherein the gap is configured such that in combination with a mixture comprising a skin, which is created under baking conditions after the mixture is added to the cavity, vapor or steam is vented from the cavity without escape of a significant amount of the mixture from the cavity and without substantial clogging of the gap with material from the vapor or steam.