(19)

(11)

EP 0 426 818 A1

(12)

(43) Date of publication: 15.05.1991 Bulletin 1991/20 (21) Application number: 90908315.0 (22) Date of filing: 02.05.1990

(51) International Patent Classification (IPC):  B22D 11/ 04( . ) B22D 11/ 16( . ) G05B 21/ 02( . ) B22D 11/ 053( . ) G01H 1/ 00( . ) (86) International application number: PCT/SE1990/000288 (87) International publication number: WO 1990/013375 (15.11.1990 Gazette 1990/26)

(84) Designated Contracting States: AT CH DE FR GB LI SE (30) Priority: 11.05.1989 SE 19890001695 (71) Applicant: CONTECH HB S-146 00 Tullinge (SE)	(72) Inventor: FRIDH, Conny S-146 00 Tullinge (SE) (74) Representative: Moberg, Sture  Kungstensgatan 48 S-11359 Stockholm S-11359 Stockholm (SE)