(19)

(11)

EP 1 592 921 A2

(12)

(88) Date of publication A3: 23.09.2004 (43) Date of publication: 09.11.2005 Bulletin 2005/45 (21) Application number: 04710875.8 (22) Date of filing: 13.02.2004

(51) International Patent Classification (IPC)7: F23L 1/00 (86) International application number: PCT/EP2004/050128 (87) International publication number: WO 2004/072552 (26.08.2004 Gazette 2004/35)

(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: 14.02.2003 IT MI20030273 (71) Applicant: PERCIVALLE SPECIAL CONVERTING S.A.S. DI PERCIVALLE BARBARA E C. 15030 ROSIGNANO MONFERRATO (IT)	(72) Inventor: PERCIVALLE, Domenico,PERCIVALLE SPECIAL CONV. SAS I-15030 Rosignano Monferrato (IT) (74) Representative: Jorio, Paolo et al STUDIO TORTA S.r.l. Via Viotti, 9 10121 Torino 10121 Torino (IT)