(19)

(11)

EP 0 566 569 A1

(12)

(43) Date of publication: 27.10.1993 Bulletin 1993/43 (21) Application number: 91910121.0 (22) Date of filing: 03.06.1991

(51) International Patent Classification (IPC):  G01J 1/ 02( . ) G01J 1/ 16( . ) G01J 1/ 04( . ) G01J 5/ 28( . ) (86) International application number: PCT/GB1991/000879 (87) International publication number: WO 1991/019538 (26.12.1991 Gazette 1991/29)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 09.06.1990 GB 19900012889 26.11.1990 GB 19900025634 (71) Applicant: UVISOL LIMITED Gloucestershire GL54 2EN (GB)	(72) Inventors: WARD, Bernadette, Leanne, Armitage Goring Reading Berkshire RG8 9EY (GB) BAILEY, William, John Oxon OX7 5BJ (GB) (74) Representative: Rock, Olaf Colin, et al  Rock and Company Trelawn Cassington Oxford OX8 1 DN Cassington Oxford OX8 1 DN (GB)