(19)

(11)

EP 0 388 415 A1

(12)

(43) Date of publication: 26.09.1990 Bulletin 1990/39 (21) Application number: 88909393.0 (22) Date of filing: 14.10.1988

(51) International Patent Classification (IPC):  B21D 37/ 01( . ) C22C 38/ 22( . ) C22C 38/ 46( . ) C22C 38/ 00( . ) C22C 38/ 24( . ) (86) International application number: PCT/SE1988/000540 (87) International publication number: WO 1989/003898 (05.05.1989 Gazette 1989/10)

(84) Designated Contracting States: AT BE DE FR GB IT (30) Priority: 28.10.1987 SE 19870004181 (71) Applicant: Uddeholm Tooling Aktiebolag S-683 05 Hagfors (SE)	(72) Inventors: JOHANSSON, Börje S-683 00 Hagfors (SE) NORSTRÖM, Lars-Ake S-683 00 Hagfors (SE) (74) Representative: Hynell, Magnus  Hynell Patenttjänst AB Box 236 S-683 02 Hagfors S-683 02 Hagfors (SE)