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EP 2 237 924 A1

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(43) Date of publication: 13.10.2010 Bulletin 2010/41 (21) Application number: 08862705.4 (22) Date of filing: 18.12.2008

(51) International Patent Classification (IPC):  B24B 5/37(2006.01) B24D 13/02(2006.01) B24D 9/04(2006.01) (86) International application number: PCT/US2008/087481 (87) International publication number: WO 2009/079639 (25.06.2009 Gazette 2009/26)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 18.12.2007 US 14621 P (71) Applicant: Alcoa Inc. Pittsburgh, PA 15212-5858 (US)

(72) Inventors: GARCIA, Eduardo Blanes E-03004 Alicante (ES) BENITO SANCHEZ, Jose S. E-03010 Alicante (ES) MARCILLA GOMIS, Salvador A. E-03540 Alicante (ES) KASUN, Thomas J. Export PA 15632 (US) SMITH, Troy G. Centerville, OH 45458  (US) WHITTLE, Neville C. Irwin PA 15642 (US) MCKINNEY, Richard D. Holtwood PA 17532 (US) REESOR, Douglas N. Lancaster PA 17602 (US) MYER, Glenn H. Manheim PA 17545 (US) (74) Representative: Trinks, Ole et al Meissner, Bolte & Partner GbR Widenmayerstrasse 48 80538 München 80538 München (DE)