(19)

(11)

EP 0 912 917 A1

(12)

(43) Date of publication: 06.05.1999 Bulletin 1999/18 (21) Application number: 97928395.0 (22) Date of filing: 14.07.1997

(51) International Patent Classification (IPC):  G03D 3/ 10( . ) G03D 13/ 00( . ) G03D 3/ 13( . ) (86) International application number: PCT/IB1997/000863 (87) International publication number: WO 1998/002781 (22.01.1998 Gazette 1998/03)

(84) Designated Contracting States: DE ES FR GB NL (30) Priority: 15.07.1996 IT 1996BO00389 (71) Applicant: Gipco S.R.L. 47100 Forli (IT)	(72) Inventor: TUMIDEI, Daniele I-47100 Forli (IT) (74) Representative: Dall'Olio, Giancarlo  INVENTION s.n.c., Via delle Armi, 1 40137 Bologna 40137 Bologna (IT)