(19)

(11)

EP 1 651 579 A1

(12)

(43) Date of publication: 03.05.2006 Bulletin 2006/18 (21) Application number: 04742126.8 (22) Date of filing: 24.06.2004

(51) International Patent Classification (IPC):  C03B 27/044(1990.01) (86) International application number: PCT/FI2004/000383 (87) International publication number: WO 2004/113241 (29.12.2004 Gazette 2004/53)

(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 PL PT RO SE SI SK TR (30) Priority: 25.06.2003 FI 20030942 (71) Applicant: Feracitas Oy 33720 Tampere (FI)	(72) Inventor: NIKANDER, Risto FI-33720 Tampere (FI) (74) Representative: Nieminen, Taisto Tapani  Patenttitoimisto T. Nieminen Oy, Kehräsaari B 33200 Tampere 33200 Tampere (FI)