(19)

(11)

EP 0 898 696 A1

(12)

(43) Date of publication: 03.03.1999 Bulletin 1999/09 (21) Application number: 97921970.0 (22) Date of filing: 14.05.1997

(51) International Patent Classification (IPC):  G01G 19/ 08( . ) (86) International application number: PCT/GB1997/001318 (87) International publication number: WO 1997/043605 (20.11.1997 Gazette 1997/50)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 14.05.1996 GB 19960009992 (71) Applicant: Ronani Limited Leamington Spa, Warwickshire CV32 6EL (GB)	(72) Inventor: Ronani Limited Leamington Spa, Warwickshire CV32 6EL (GB) (74) Representative: Kidd, Piers Burgess, et al  Marks & Clerk, 57-60 Lincoln's Inn Field London WC2A 3LS London WC2A 3LS (GB)