(19)

(11)

EP 0 864 116 A1

(12)

(43) Date of publication: 16.09.1998 Bulletin 1998/38 (21) Application number: 96940009.0 (22) Date of filing: 28.11.1996

(51) International Patent Classification (IPC):  G03B 27/ 52( . ) G03B 27/ 54( . ) (86) International application number: PCT/GB1996/002935 (87) International publication number: WO 1997/021143 (12.06.1997 Gazette 1997/25)

(84) Designated Contracting States: DE FR GB (30) Priority: 02.12.1995 GB 19950024687 (71) Applicant: Integrex Limited Swadlincote, Derbyshire DE11 9PT (GB)	(72) Inventor: PORTUS, Robert Terence Swadlincote, Derbyshire DE11 9PT (GB) (74) Representative: Lock, Howard John  Swindell & Pearson, 48 Friar Gate Derby DE1 1GY Derby DE1 1GY (GB)