(19)

(11)

EP 0 653 047 A1

(12)

(43) Date of publication: 17.05.1995 Bulletin 1995/20 (21) Application number: 93917906.0 (22) Date of filing: 23.07.1993

(51) International Patent Classification (IPC):  A22B 5/ 00( . ) G01B 7/ 06( . ) A22C 17/ 00( . ) G01N 33/ 12( . ) (86) International application number: PCT/GB1993/001564 (87) International publication number: WO 1994/002803 (03.02.1994 Gazette 1994/04)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE (30) Priority: 25.07.1992 GB 19920015866 (71) Applicant: AEW INTERNATIONAL LIMITED Salhouse Road, Norwich NR7 9BB (GB)	(72) Inventor: WHITEHOUSE, John Arthur Mulbarton, Norwich NR14 8LX (GB) (74) Representative: Nash, Keith Wilfrid, et al  KEITH W. NASH & Co. Pearl Assurance House 90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)