(19)

(11)

EP 0 299 021 A1

(12)

(43) Date of publication: 18.01.1989 Bulletin 1989/03 (21) Application number: 88900837.0 (22) Date of filing: 19.01.1988

(51) International Patent Classification (IPC):  B22D 41/ 14( . ) (86) International application number: PCT/GB1988/000032 (87) International publication number: WO 1988/005355 (28.07.1988 Gazette 1988/17)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 20.01.1987 GB 19870001158 (71) Applicant: DAVY (DISTINGTON) LIMITED Workington Cumbria CA14 2JJ (GB)	(72) Inventors: REYNOLDS, Timothy Cockermouth Cumbria (GB) PERRY, Robert, Maidens Cumbria (GB) PRESHAW, David, Alan Cumbria (GB) (74) Representative: Kirk, Geoffrey Thomas, et al  BATCHELLOR, KIRK & CO. 2 Pear Tree Court Farringdon Road London EC1R 0DS London EC1R 0DS (GB)