(19)

(11)

EP 1 856 347 A1

(12)

(43) Date of publication: 21.11.2007 Bulletin 2007/47 (21) Application number: 06728431.5 (22) Date of filing: 16.02.2006

(51) International Patent Classification (IPC):  E04F 11/18(2006.01) (86) International application number: PCT/IT2006/000079 (87) International publication number: WO 2006/090422 (31.08.2006 Gazette 2006/35)

(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: 25.02.2005 IT RA20050004 (71) Applicant: ERRETI S.r.l. 48010 Bagnara di Romagna (Ravenna) (IT)	(72) Inventor: AVVANZINI, Ugo I-48010 Bagnara di Romagna (IT) (74) Representative: De Angelis, Dante  Roncuzzi & Associati S.r.l. Via Antica Zecca, 6 48100 Ravenna 48100 Ravenna (IT)