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(11)

EP 1 789 597 A1

(12)

(43) Date of publication: 30.05.2007 Bulletin 2007/22 (21) Application number: 05769695.7 (22) Date of filing: 16.08.2005

(51) International Patent Classification (IPC):  C21D 8/00(2006.01) C21D 1/02(2006.01) C21D 1/10(2006.01) C21D 9/00(2006.01) C21D 7/13(2006.01) C21D 1/06(2006.01) C21D 1/18(2006.01) B21K 1/00(2006.01) (86) International application number: PCT/AU2005/001090 (87) International publication number: WO 2006/017880 (23.02.2006 Gazette 2006/08)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 18.08.2004 AU 2004904672 (71) Applicant: Bishop Innovation Pty. Limited North Ryde, NSW 2113 (AU)	(72) Inventor: POLLARD, Kenneth, Brian, Thompson Camperdoen, NSW 2050 (AU) (74) Representative: UEXKÜLL & STOLBERG  Patentanwälte Beselerstrasse 4 22607 Hamburg 22607 Hamburg (DE)