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(11)

EP 1 296 780 A1

(12)

(43) Date of publication: 02.04.2003 Bulletin 2003/14 (21) Application number: 01934807.7 (22) Date of filing: 29.05.2001

(51) International Patent Classification (IPC)7: B21D 7/02, B21D 37/00, B21D 43/00, B21D 43/02 (86) International application number: PCT/SG0100/108 (87) International publication number: WO 0109/1936 (06.12.2001 Gazette 2001/49)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 31.05.2000 SG 200002933 (71) Applicant: Natsteel Technology Investments PTE Ltd Singapore 628048 (SG)	(72) Inventors: ENG, Poh, Tzan Singapore 128185 (SG) KWA, Lay, Keng Singapore 288937 (SG) NG, Ghee, Hua Singapore 760253 (SG) CHAI, Wen Chuong Taman Perling,Johor Bahru 81300 (MY) ZHANG, Hui Singapore 650354 (SG) (74) Representative: Sanderson, Nigel Paul  Harrison Goddard Foote,Belgrave HallBelgrave Street Leeds LS2 8DD Leeds LS2 8DD (GB)