(19)

(11)

EP 1 631 366 A1

(12)

(43) Date of publication: 08.03.2006 Bulletin 2006/10 (21) Application number: 04734841.2 (22) Date of filing: 26.05.2004

(51) International Patent Classification (IPC):  B01D 25/12(1968.09) (86) International application number: PCT/EP2004/005760 (87) International publication number: WO 2004/110587 (23.12.2004 Gazette 2004/52)

(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: 06.06.2003 IT AO20030058 06.06.2003 IT AO20030059 (71) Applicant: DIEMME S.P.A. 48022 Lugo (IT)	(72) Inventors: BARTALUCCI, Piero I-50059 Vinci (Firenze) (IT) GENTILI, Luciano I-47023 Cesena (Forli'Cesena) (IT) (74) Representative: Corradini, Corrado et al Studio Ing. C. CORRADINI & C. S.r.l. 4, Via Dante Alighieri 42100 Reggio Emilia 42100 Reggio Emilia (IT)