(19)

(11)

EP 0 389 487 A1

(12)

(43) Date of publication: 03.10.1990 Bulletin 1990/40 (21) Application number: 88908287.0 (22) Date of filing: 22.09.1988

(51) International Patent Classification (IPC):  B02C 13/ 284( . ) (86) International application number: PCT/GB1988/000777 (87) International publication number: WO 1989/002784 (06.04.1989 Gazette 1989/08)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 22.09.1987 GB 19870022260 (71) Applicant: METPRO MACHINERY LIMITED Bridgend, Mid Glamorgan CF31 3TP (GB)	(72) Inventor: EVANS, Edward, Aneurin Bridgend Mid Glamorgan (GB) (74) Representative: Austin, Hedley William, et al  Urquhart-Dykes & Lord Alexandra House 1 Alexandra Road Swansea West Glamorgan SA1 5ED Swansea West Glamorgan SA1 5ED (GB)