(19)

(11)

EP 1 009 880 A1

(12)

(43) Date of publication: 21.06.2000 Bulletin 2000/25 (21) Application number: 98913774.0 (22) Date of filing: 08.04.1998

(51) International Patent Classification (IPC)7: E01C 13/04, E01C 5/20, E04F 15/10, A63C 19/12 (86) International application number: PCT/FI9800/307 (87) International publication number: WO 9846/830 (22.10.1998 Gazette 1998/42)

(84) Designated Contracting States: DE ES FI FR GB IT SE (30) Priority: 16.04.1997 FI 971594 (71) Applicant: Variform OY 00150 Helsinki (FI)	(72) Inventor: VALTANEN, Jarkko FIN-00101 Helsinki (FI) (74) Representative: Kangasmäki, Reijo Holger  Finnish Patent Consulting FPC,Hermiankatu 14 33720 Tampere 33720 Tampere (FI)