(19)

(11)

EP 0 458 812 A1

(12)

(43) Date of publication: 04.12.1991 Bulletin 1991/49 (21) Application number: 90902633.0 (22) Date of filing: 12.02.1990

(51) International Patent Classification (IPC):  B28C 5/ 42( . ) (86) International application number: PCT/FI1990/000043 (87) International publication number: WO 1990/009266 (23.08.1990 Gazette 1990/20)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 14.02.1989 FI 19890000687 (71) Applicant: MINKKINEN,Risto SF-41340 Laukaa (FI)	(72) Inventor: MINKKINEN,Risto SF-41340 Laukaa (FI) (74) Representative: Patentanwälte Dr. Solf & Zapf  Candidplatz 15 D-81543 München D-81543 München (DE)