Metal fusion bonding – Process – With shaping
Patent
1999-04-30
2000-07-04
Heinrich, Samuel M.
Metal fusion bonding
Process
With shaping
228190, 2282351, 220912, B23K 2002
Patent
active
060826118
ABSTRACT:
A method of making a multi-ply bottom of clad metal cookware is disclosed. In the method, both an aluminum plate and a stainless steel cladding plate, externally laid on a base bottom of the clad metal cookware held on a friction press, is pressed down using an instantaneous pressure of the friction press, thus being integrated with the base bottom of the cookware in a way such that the stainless steel cladding plate is fully integrated with the base bottom of the cookware within a predetermined area including a corner of the base bottom. The instantaneous pressure of the friction press ranges from 800 tons to 1,500 tons. In the multi-ply bottom of this invention, the aluminum plate has a dense structure, and increases heat conductivity, heat conservativity, and thermal efficiency of the cookware while allowing the multi-ply bottom to be free from partially heating food in the cookware. The method also reduces the production cost of the cookware.
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patent: 5257717 (1993-11-01), Galle
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