(19)

(11)

EP 2 160 257 A2

(12)

(88) Date of publication A3: 26.02.2009 (43) Date of publication: 10.03.2010 Bulletin 2010/10 (21) Application number: 08738091.1 (22) Date of filing: 07.05.2008

(51) International Patent Classification (IPC):  B21D 5/02(2006.01) (86) International application number: PCT/IB2008/051783 (87) International publication number: WO 2008/152536 (18.12.2008 Gazette 2008/51)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 11.06.2007 IT MI20071174 (71) Applicant: Rolleri S.P.A. 29020 Vigolzone (Piacenza) (IT)	(72) Inventor: MAZZOCCHI, Domenico I-29020 Vigolzone (Piacenza) (IT) (74) Representative: Brasca, Marco  Bugnion S.p.A. Viale Lancetti, 17 20158 Milano 20158 Milano (IT)