(19)

(11)

EP 0 850 115 A1

(12)

(43) Date of publication: 01.07.1998 Bulletin 1998/27 (21) Application number: 96919420.0 (22) Date of filing: 14.06.1996

(51) International Patent Classification (IPC):  B22D 11/ 00( . ) B22D 11/ 06( . ) B22D 11/ 22( . ) B22D 11/ 059( . ) B22D 11/ 07( . ) (86) International application number: PCT/US1996/010319 (87) International publication number: WO 1997/000147 (03.01.1997 Gazette 1997/02)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 16.06.1995 BR 19950002834 (71) Applicants: Alcoa Aluminio S.A. 53700-000-Itapissuma, PE (BR) ALUMINIUM COMPANY OF AMERICA Alcoa Center, PA 15069-0001 (US)	(72) Inventor: GODINHO, Wilton, D. 53700-000-Itapissuma, PE (BR) (74) Representative: Baillie, Iain Cameron, et al  Ladas & Parry, Altheimer Eck 2 80331 München 80331 München (DE)