(19)

(11)

EP 2 217 109 A1

(12)

(43) Date of publication: 18.08.2010 Bulletin 2010/33 (21) Application number: 07866773.0 (22) Date of filing: 27.11.2007

(51) International Patent Classification (IPC):  A47C 1/12(2006.01) (86) International application number: PCT/IT2007/000826 (87) International publication number: WO 2009/069158 (04.06.2009 Gazette 2009/23)

(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 MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (71) Applicant: Politecnico di Milano 20133 Milano (IT)	(72) Inventors: DE BONIS SCIARAFFIA, Michele I-85010 Pignola (PZ) (IT) GUALANDI, Gilberto I-44047 Sant'Agostino (FE) (IT) COSTA, Fiammetta I-20214 Milano (MI) (IT) ROMERO, Maximiliano I-20123 Milano (MI) (IT) (74) Representative: Bonvicini, Davide  Perani Mezzanotte & Partners Piazza San Babila, 5 20122 Milano 20122 Milano (IT)