(19)

(11)

EP 1 511 693 A1

(12)

(43) Date of publication: 09.03.2005 Bulletin 2005/10 (21) Application number: 03732601.4 (22) Date of filing: 30.05.2003

(51) International Patent Classification (IPC)7: C03B 27/044 (86) International application number: PCT/FI2003/000427 (87) International publication number: WO 2003/101897 (11.12.2003 Gazette 2003/50)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 30.05.2002 FI 20021014 (71) Applicant: Feracitas Oy 33720 Tampere (FI)	(72) Inventor: NIKANDER, Risto FIN-33720 Tampere (FI) (74) Representative: Nieminen, Taisto Tapani  Patenttitoimisto T. Nieminen Oy,Kehräsaari B 33200 Tampere 33200 Tampere (FI)