The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 04, 2000
Filed:
Apr. 30, 1999
Myung Suk Kim, 137-060, Seoul, KR;
Other;
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.