(19)

(11)

EP 0 914 526 A1

(12)

(43) Date of publication: 12.05.1999 Bulletin 1999/19 (21) Application number: 97934781.0 (22) Date of filing: 24.07.1997

(51) International Patent Classification (IPC):  E03D 11/ 11( . ) E03F 5/ 20( . ) E03F 5/ 10( . ) (86) International application number: PCT/NL1997/000442 (87) International publication number: WO 1998/003743 (29.01.1998 Gazette 1998/04)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 24.07.1996 NL 19961003672 (71) Applicant: WISA B.V. NL-6827 BP Arnhem (NL)	(72) Inventor: BENTE, Robertus, Cornelis, Wilhelmus, Maria NL-6815 EJ Arnhem (NL) (74) Representative: Bartelds, Erik  Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1 2517 GK Den Haag 2517 GK Den Haag (NL)