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:
Dec. 25, 2012
Filed:
May. 21, 2009
Todd F. Bischoff, Spokane Valley, WA (US);
Randy Womack, Spokane Valley, WA (US);
Wayne J. Fenton, Spokane Valley, WA (US);
Robert Bruce Wagstaff, Spokane Valley, WA (US);
Lawrence G. Hudson, Pulaski, NY (US);
Todd F. Bischoff, Spokane Valley, WA (US);
Randy Womack, Spokane Valley, WA (US);
Wayne J. Fenton, Spokane Valley, WA (US);
Robert Bruce Wagstaff, Spokane Valley, WA (US);
Lawrence G. Hudson, Pulaski, NY (US);
Novelis Inc., Toronto, Ontario, CA;
Abstract
A method and apparatus is disclosed for casting a composite ingot made of metals that are susceptible to surface oxide formation when molten. The method involves co-casting at least two metal layers from at least two molten metal pools formed within a direct chill casting apparatus. During the casting operation, movement of metal oxide formed on the upper surface of at least one of the pools towards an edge of the pool is restrained by an oxide skimmer positioned close to an edge of the pool above an external surface or metal-metal interface of the ingot. The apparatus provides a DC caster with at least one oxide skimmer that operates in this manner.