(19)

(11)

EP 0 403 537 A1

(12)

(43) Date of publication: 27.12.1990 Bulletin 1990/52 (21) Application number: 89903596.0 (22) Date of filing: 10.03.1989

(51) International Patent Classification (IPC):  B24B 1/ 04( . ) B24B 35/ 00( . ) (86) International application number: PCT/US1989/000962 (87) International publication number: WO 1989/008535 (21.09.1989 Gazette 1989/23)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 10.03.1988 US 19880166502 03.02.1989 US 19890305768 (71) Applicant: EXTRUDE HONE CORPORATION Irwin PA 15642 (US)	(72) Inventor: RHOADES, Lawrence, J. Extrude Hone Corporation Irwin, PA 15642 (US) (74) Representative: Lawson, David Glynne, et al  MARKS & CLERK, 57-60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)