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(11)

EP 1 220 725 A1

(12)

(43) Date of publication: 10.07.2002 Bulletin 2002/28 (21) Application number: 00965703.2 (22) Date of filing: 10.10.2000

(51) International Patent Classification (IPC)7: B21D 26/02, C22F 1/04 (86) International application number: PCT/CA0001/181 (87) International publication number: WO 0128/708 (26.04.2001 Gazette 2001/17)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 15.10.1999 US 159570 P (71) Applicant: Cosma International Inc. Concord,Ontario L4K 4J5 (CA)	(72) Inventors: CORCORAN, Brian Oxford, MI 48371 (US) FLESCHNER, Richard Clarkson, MI 48346 (US) CONKLIN, Jeffrey Utica, MI 48317 (US) (74) Representative: Hössle & Kudlek  Patentanwälte,Postfach 10 23 38 70019 Stuttgart 70019 Stuttgart (DE)