(19)

(11)

EP 0 682 805 A1

(12)

(43) Date of publication: 22.11.1995 Bulletin 1995/47 (21) Application number: 94904231.0 (22) Date of filing: 11.01.1994

(51) International Patent Classification (IPC):  G21F 1/ 10( . ) G21F 3/ 03( . ) (86) International application number: PCT/GB1994/000046 (87) International publication number: WO 1994/016448 (21.07.1994 Gazette 1994/17)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 12.01.1993 GB 19930000564 (71) Applicant: Smith & Nephew plc London WC2R 3BP (GB)	(72) Inventor: SANDBANK, Barry Michael, Penny Cottage Cheshire CH2 4JN (GB) (74) Representative: Gilholm, Stephen Philip, et al  Corporate Patents Department Smith & Nephew Group Research Centre York Science Park Heslington York YO1 5DF Heslington York YO1 5DF (GB)