(19)

(11)

EP 0 129 583 A1

(12)

(43) Date of publication: 02.01.1985 Bulletin 1985/01 (21) Application number: 84900258.0 (22) Date of filing: 12.12.1983

(51) International Patent Classification (IPC):  B24D 18/ 00( . ) (86) International application number: PCT/US1983/001946 (87) International publication number: WO 1984/002300 (21.06.1984 Gazette 1984/15)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 13.12.1982 US 19820449152 (71) Applicant: HALE ENGINEERING INC. Danvers, MA 01923 (US)	(72) Inventor: COLE, Richard, F. Marblehead, MA 01945 (US)