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(11)

EP 0 239 577 A1

(12)

(43) Date of publication: 07.10.1987 Bulletin 1987/41 (21) Application number: 86904187.0 (22) Date of filing: 02.07.1986

(51) International Patent Classification (IPC):  A61B 17/ 68( . ) A61L 31/ 06( . ) A61B 17/ 00( . ) A61B 17/ 86( . ) A61N 1/ 30( . ) A61F 2/ 30( . ) A61L 31/ 14( . ) A61B 17/ 80( . ) A61F 2/ 02( . ) (86) International application number: PCT/FI1986/000071 (87) International publication number: WO 1987/000059 (15.01.1987 Gazette 1987/01)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 09.07.1985 FI 19850002706 (71) Applicant: Materials Consultants Oy SF-33730 Tampere (FI)

(72) Inventors: TÖRMÄLÄ, Pertti SF-33730 Tampere (FI) KILPIKARI, Jyrki SF-33500 Tampere (FI) LAIHO, Juha SF-33230 Tampere (FI) TAMMINMÄKI, Markku SF-33400 Tampere (FI) RITAKORPI, Arto SF-33100 Tampere (FI) MIKKONEN, Taito SF-36200 Kangasala (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)