(19)

(11)

EP 0 894 162 A1

(12)

(43) Date of publication: 03.02.1999 Bulletin 1999/05 (21) Application number: 97914336.0 (22) Date of filing: 20.03.1997

(51) International Patent Classification (IPC):  D21F 1/ 52( . ) (86) International application number: PCT/FI1997/000182 (87) International publication number: WO 1997/035066 (25.09.1997 Gazette 1997/41)

(84) Designated Contracting States: AT CH DE ES FI FR GB IT LI NL PT SE (30) Priority: 20.03.1996 FI 19960001273 (71) Applicant: PPR Consulting Ltd. 02700 Kauniainen (FI)	(72) Inventor: RANTALA, Pekka FIN-02700 Kauniainen (FI) (74) Representative: LEITZINGER OY  Ruoholahdenkatu 8 00180 Helsinki 00180 Helsinki (FI)