(19)

(11)

EP 0 998 364 A2

(12)

(88) Date of publication A3: 04.06.1998 (43) Date of publication: 10.05.2000 Bulletin 2000/19 (21) Application number: 97938995.4 (22) Date of filing: 28.08.1997

(51) International Patent Classification (IPC)7: B23B 3/12, B23B 31/12, F24J 2/00, E04B 1/74 (86) International application number: PCT/GB9702/315 (87) International publication number: WO 9808/640 (05.03.1998 Gazette 1998/09)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 28.08.1996 GB 9617931 (71) Applicant: McMahon, Nicholas London EC1M 4DT (GB)	(72) Inventor: McMahon, Nicholas London EC1M 4DT (GB) (74) Representative: Beresford, Keith Denis Lewis et al BERESFORD & Co.High Holborn2-5 Warwick Court London WC1R 5DJ London WC1R 5DJ (GB)