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(11)

EP 2 421 738 A1

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(43) Date of publication: 29.02.2012 Bulletin 2012/09 (21) Application number: 10714183.0 (22) Date of filing: 01.04.2010

(51) International Patent Classification (IPC):  B61L 27/00(2006.01) (86) International application number: PCT/EP2010/002096 (87) International publication number: WO 2010/121706 (28.10.2010 Gazette 2010/43)

(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 (30) Priority: 24.04.2009 IT TO20090324 (71) Applicant: Sirti S.p.A. 20127 Milano (IT)	(72) Inventors: POZZI, Danilo, Emilio I-20127 Milano (IT) MILANI, Pietro I-20127 Milano (IT) (74) Representative: Di Gennaro, Sergio  Barzanò & Zanardo Milano S.p.A. Corso Vittorio Emanuele II, 61 10128 Torino 10128 Torino (IT)