(19)

(11)

EP 0 968 032 A1

(12)

(43) Date of publication: 05.01.2000 Bulletin 2000/01 (21) Application number: 97902371.0 (22) Date of filing: 03.02.1997

(51) International Patent Classification (IPC)7: A62D 3/00, B09B 3/00 (86) International application number: PCT/FI9700/057 (87) International publication number: WO 9727/902 (07.08.1997 Gazette 1997/34)

(84) Designated Contracting States: DE ES FR GB IT SE (30) Priority: 01.02.1996 FI 960472 (71) Applicant: HJA-engineering Oy 37720 Ritvala (FI)	(72) Inventors: PUSA, Markku, Pete, Juhani FIN-11130 Riihimäki (FI) KARHUMÄKI, Markku, Kalevi FIN-11130 Riihimäki (FI) AHONEN, Heikki, Juhani FIN-37720 Ritvala (FI) (74) Representative: Sundman, Christoffer et al Seppo Laine Oy,Itämerenkatu 3 B 00180 Helsinki 00180 Helsinki (FI)