(19)

(11)

EP 0 891 454 A1

(12)

(43) Date of publication: 20.01.1999 Bulletin 1999/03 (21) Application number: 97901102.0 (22) Date of filing: 23.01.1997

(51) International Patent Classification (IPC):  E02D 5/ 52( . ) (86) International application number: PCT/FI1997/000029 (87) International publication number: WO 1997/038173 (16.10.1997 Gazette 1997/44)

(84) Designated Contracting States: AT BE DE DK FR GB IE NL (30) Priority: 09.04.1996 FI 19960001552 (71) Applicant: Leimet Oy 27231 Lappi TL (FI)	(72) Inventor: KOIVUNEN, Kari, Kalevi FIN-27430 Panelia (FI) (74) Representative: Laako, Tero Jussi  Berggren Oy Ab P.O. Box 16 00101 Helsinki 00101 Helsinki (FI)