(19)

(11)

EP 0 880 432 A1

(12)

(43) Date of publication: 02.12.1998 Bulletin 1998/49 (21) Application number: 97902383.0 (22) Date of filing: 06.02.1997

(51) International Patent Classification (IPC):  B28B 7/ 00( . ) B28B 7/ 42( . ) (86) International application number: PCT/FI1997/000069 (87) International publication number: WO 1997/028940 (14.08.1997 Gazette 1997/35)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 07.02.1996 FI 19960000551 (71) Applicant: Specifinn OY 48220 Kotka (FI)	(72) Inventor: PAKISJÄRVI, Heikki FIN-70260 Kuopio (FI) (74) Representative: Pitkänen, Hannu Alpo Antero  Patent Agency Pitkänen Oy, Savilahdentie 6 L 3 70210 Kuopio 70210 Kuopio (FI)