Abstract: A cooking and/or boiling utensil for bottom thermal energy application through thermal conduction or through electromagnetic induction. The container has a round horizontal section of austenitic steel, a thermal distribution plate of suitable thickness flush against the container base of a metal with a good thermal conductivity, and a ferromagnetic plate cover against the thermal distribution plate. The ferromagnetic metal plate cover has cover recesses mainly formed as radial slots. The radial slots start at the center and end inwardly of the cover collar. The sandwich unit consisting of the container base, the thermal distribution plate and the plate cover is substantially deformation-proof due to adjustment of the container thickness of the container base and the container thickness of the plate cover on one hand and the length and width of the slots and the diameter of the center on the other, during thermal energy application through thermal expansion.

Abstract: A method of manufacturing a cooking utensil comprising a round container for the food. The container comprises a container, a plate made of heat-conducting material and a cap enclosing the plate, the cap being made from a sheet-metal disk and having a base provided with a convex curvature towards the container and also having collar which bears against the round container in a curved transition region between the container base and the container jacket. The container and the cap are made of stainless steel. The plate is intermetallically bonded to the container base and the cap. The plate, the sheet-metal disk and the container base are centered and connected by a central spot weld, using electric resistance welding. Next, the intermetallic bond is produced by single or multiple impulse pressure and permanent deformation and the cap collar is formed on the sheet-metal disk and its rim is placed around the container.