(19)

(11)

EP 1 252 003 A1

(12)

(43) Date of publication: 30.10.2002 Bulletin 2002/44 (21) Application number: 00966184.4 (22) Date of filing: 02.10.2000

(51) International Patent Classification (IPC)7: B27K 3/50, B27K 3/52, B27K 5/00, B27N 7/00 (86) International application number: PCT/FI0000/850 (87) International publication number: WO 0102/3154 (05.04.2001 Gazette 2001/14)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 30.09.1999 FI 992103 (71) Applicant: Valtion Teknillinen Tutkimuskeskus 02044 VTT (FI)	(72) Inventors: RITSCHKOFF, Anne-Christine FIN-00320 Helsinki (FI) MAHLBERG, Riitta FIN-00440 Helsinki (FI) VIIKARI, Liisa FIN-00200 Helsinki (FI) (74) Representative: Sundman, Christoffer et al Seppo Laine Oy,Itämerenkatu 3 B 00180 Helsinki 00180 Helsinki (FI)