(19)

(11)

EP 0 483 289 A1

(12)

(43) Date of publication: 06.05.1992 Bulletin 1992/19 (21) Application number: 90917928.0 (22) Date of filing: 18.07.1990

(51) International Patent Classification (IPC):  E04F 17/ 08( . ) (86) International application number: PCT/FI1990/000183 (87) International publication number: WO 1991/001421 (07.02.1991 Gazette 1991/04)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 19.07.1989 FI 19890003492 (71) Applicant: OY SEWATEK AB SF-50130 Mikkeli (FI)	(72) Inventor: PARTANEN, Vesa, Antero SF-50100 Mikkeli (FI) (74) Representative: Masch, Karl Gerhard, Dr., et al  Patentanwälte, Andrejewski, Honke & Partner, Postfach 10 02 54 D-45002 Essen D-45002 Essen (DE)