Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
January 11, 2011
Patent Application Number
11930838
Date Filed
October 31, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
A method for fabricating multi-sheet structures in which a first sheet is arranged on a planar support and a blowing agent is placed on at least one selected portion of the first sheet. A second sheet is positioned over the first sheet so that the second sheet overlies the selected portion of the first sheet and the first and second sheets are then secured together by friction stir welding in a pattern which encloses the selected portion of the first sheet. Additional sheets may be secured together in a like fashion. Thereafter, the sheets are heated to a temperature sufficient to decompose the blowing agent.
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