(19)

(11)

EP 0 518 910 A1

(12)

(43) Date of publication: 23.12.1992 Bulletin 1992/52 (21) Application number: 91905091.0 (22) Date of filing: 07.03.1991

(51) International Patent Classification (IPC):  B21D 7/ 12( . ) G05B 19/ 42( . ) (86) International application number: PCT/FI1991/000067 (87) International publication number: WO 1991/013706 (19.09.1991 Gazette 1991/22)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 07.03.1990 FI 19900001153 (71) Applicant: TOKOLA, Johannes SF-04600 Mäntsälä (FI)	(72) Inventor: TOKOLA, Johannes SF-04600 Mäntsälä (FI) (74) Representative: Smulders, Theodorus A.H.J., Ir., et al  Vereenigde Octrooibureaux Nieuwe Parklaan 97 NL-2587 BN 's-Gravenhage NL-2587 BN 's-Gravenhage (NL)