(19)

(11)

EP 1 828 688 A1

(12)

(43) Date of publication: 05.09.2007 Bulletin 2007/36 (21) Application number: 05850679.1 (22) Date of filing: 01.12.2005

(51) International Patent Classification (IPC):  F24D 12/02(2006.01) F28D 7/10(2006.01) F23J 15/06(2006.01) F28F 1/16(2006.01) F28D 7/12(2006.01) (86) International application number: PCT/IB2005/003630 (87) International publication number: WO 2006/059215 (08.06.2006 Gazette 2006/23)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 02.12.2004 IT BG20040046 (71) Applicant: Groppalli S.r.l. 29010 Gragnano Trebbiense (PC) (IT)	(72) Inventor: GROPPALLI, Luciano 29010 Agazzano (IT) (74) Representative: Giavarini, Francesco et al Zanoli & Giavarini S.r.l. Via Melchiorre Gioia, 64 20125 Milano 20125 Milano (IT)