(19)

(11)

EP 1 232 415 A2

(12)

(88) Date of publication A3: 08.11.2001 (43) Date of publication: 21.08.2002 Bulletin 2002/34 (21) Application number: 00974517.5 (22) Date of filing: 09.11.2000

(51) International Patent Classification (IPC)7: G02F 1/313 (86) International application number: PCT/EP0011/128 (87) International publication number: WO 0103/8933 (31.05.2001 Gazette 2001/22)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 23.11.1999 EP 99123324 30.11.1999 US 167917 P (71) Applicant: Corning O.T.I. S.p.A. 20126 Milano (IT)	(72) Inventors: SCIANCALEPORE, Davide I-10014 Caluso (IT) DELL'ORTO, Flavio I-20038 Seregno (IT) (74) Representative: Giannesi, Simona  Porta, Checcacci & Associati S.p.A.Viale Sabotino 19/2 20135 Milano 20135 Milano (IT)