(19)

(11)

EP 0 561 894 A1

(12)

(43) Date of publication: 29.09.1993 Bulletin 1993/39 (21) Application number: 92900664.0 (22) Date of filing: 11.12.1991

(51) International Patent Classification (IPC):  B24B 7/ 16( . ) B24B 41/ 00( . ) (86) International application number: PCT/GB1991/002194 (87) International publication number: WO 1992/010332 (25.06.1992 Gazette 1992/14)

(84) Designated Contracting States: AT BE CH DE DK ES FR IT LI NL SE (30) Priority: 11.12.1990 GB 19900026868 (71) Applicant: SPRINGCO (NI) LIMITED Portadown, County Armagh BT62 3EG (GB)	(72) Inventor: HOUSTON, James Portadown, County Armagh BT62 3EG (GB) (74) Representative: Connor, Terence Kevin  T.K. Connor & Co. 19 Station Road Sidcup, Kent DA15 7EB Sidcup, Kent DA15 7EB (GB)