Cooking vessel having multiple bottom structure and method for p

Details Cooking vessel having multiple bottom structure and method for p Cooking vessel having multiple bottom structure and method for p

1994-06-28

1996-10-15

Cronin, Stephen K.

Receptacles

End wall structure

Multi-layer end wall structure

220442, 220443, 220912, 220453, 126375, 126390, B65D 628

Patent

active

055645909

ABSTRACT:
A cooking vessel having a multiple bottom structure. The cooking vessel strengthens the structure of a bottom plate, made of copper, copper alloy, aluminum or aluminum alloy, by simple insertion of a reinforcing member on the bottom plate. The reinforcing member is made of a ferrous metal or a nonferrous metal different from the material of the bottom plate. With the difference of heat conduction between the bottom plate and the reinforcing means made of different materials, the heat transfer rate, the heat conductivity and the heat preservation of the vessel bottom are remarkably improved. When the reinforcing member is magnetized, the cooking vessel can be used with an induction heater. The reinforcing member is inserted in the bottom plate such that its bottom is leveled with a bottom surface of the bottom plate. In production of the cooking vessel, the bottom plate is preheated to temperatures ranged from 470.degree. C. to 490.degree. C. and, thereafter, the reinforcing member is pressed down onto the bottom of the bottom plate using instantaneous pressures ranged from 1000 to 1300 ton, thus to be inserted into the bottom plate.

REFERENCES:
patent: 3017492 (1962-01-01), Jepson
patent: 4204607 (1980-05-01), Zani
patent: 4596236 (1986-06-01), Eide
patent: 4614852 (1986-09-01), Matsushita et al.
patent: 5064055 (1991-11-01), Bessenbach et al.

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