Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Michael Castellucci0
Roy Humpage0
Geoffrey Thomas Deeley0
Date of Patent
August 9, 2011
Patent Application Number
13087014
Date Filed
April 14, 2011
Patent Primary Examiner
Patent abstract
A sheet of cold rolled material having on both of its surfaces rows of projections and rows of depressions, the projections on one surface corresponding with the depressions on the other surface, the relative positions of the projections and depressions being such that lines drawn on a surface of the sheet between adjacent rows of projections are non-rectilinear, the sheet having a base gauge G, wherein each projection has a substantially continuous region of peak plastic strain at, toward or about its apex and/or is thinned by no more than 25% of its base gauge G. Methods of forming the sheet material and tools for forming the sheet material are disclosed.
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