(19)

(11)

EP 2 271 810 A1

(12)

(43) Date of publication: 12.01.2011 Bulletin 2011/02 (21) Application number: 09730970.2 (22) Date of filing: 09.03.2009

(51) International Patent Classification (IPC):  E04F 15/10(2006.01) (86) International application number: PCT/EP2009/001664 (87) International publication number: WO 2009/124625 (15.10.2009 Gazette 2009/42)

(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 TR Designated Extension States: AL BA RS (30) Priority: 09.04.2008 IT MI20080617 (71) Applicant: Zenoma S.r.l. 28100 Novara (IT)	(72) Inventors: VALSESIA, Mauro I-28021 Borgomanero (IT) POLETTI, Peppino I-28021 Borgomanero (IT) VALSESIA, Franco I-28021 Borgomanero (IT) (74) Representative: Petruzziello, Aldo  Racheli S.R.L. Viale San Michele del Carso, 4 20144 Milano 20144 Milano (IT)