(19)

(11)

EP 1 159 096 A1

(12)

(43) Date of publication: 05.12.2001 Bulletin 2001/49 (21) Application number: 00910894.5 (22) Date of filing: 10.03.2000

(51) International Patent Classification (IPC)7: B21D 28/12 (86) International application number: PCT/FI0000/185 (87) International publication number: WO 0053/355 (14.09.2000 Gazette 2000/37)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 11.03.1999 FI 990532 (71) Applicant: VAHTERUS OY 23600 Kalanti (FI)	(72) Inventor: KONTU, Mauri FIN-23600 Kalanti (FI) (74) Representative: Heikkilä, Hannes Antero  Turun Patenttitoimisto Oy,P.O. Box 99 20521 Turku 20521 Turku (FI)