Patent ID: 6422233
Filing Date: 2002-07-23
Classification: A47J,Y10S

Abstract:
A cooking utensil comprising a composite base structure, the composite base structure comprising:an aluminum insert plate, and an external stainless steel plate, said external plate positioned adjacent the insert plate and 1) having perforations therethrough, wherein said perforations are filled by portions of the insert plate extending toward the external plate, the portions being substantially flush with an outer surface of the external plate, 2) having a central zone stamped therein to form a sunken disc zone without perforations, and wherein the density of the perforations has a maximum value in an intermediate annular band located between an outer annular band and an inner annular band of the outer surface of the external plate, the density of the perforations being higher than about 20% and the surface area of a largest perforation being less than about 0.8% of the external plate.