(19)

(11)

EP 2 512 682 A1

(12)

(43) Date of publication: 24.10.2012 Bulletin 2012/43 (21) Application number: 09807462.8 (22) Date of filing: 17.12.2009

(51) International Patent Classification (IPC):  B03C 3/68(2006.01) B03C 3/08(2006.01) B03C 3/38(2006.01) (86) International application number: PCT/IB2009/055827 (87) International publication number: WO 2011/073732 (23.06.2011 Gazette 2011/25)

(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 MK MT NL NO PL PT RO SE SI SK SM TR (71) Applicant: Periso SA 6810 Isone (CH)	(72) Inventors: TONEATTO, Domenico CH-5734 Reinach AG (CH) VOLO, Cataldo I-21030 Mesenzana (VA) (IT) MALCOTTI, Gianmarco I-21010 Porto Valtravaglia (VA) (IT) (74) Representative: Zardi, Marco  M. Zardi & Co. S.A. Via Pioda 6 6900 Lugano 6900 Lugano (CH)