(19)

(11)

EP 0 083 614 A1

(12)

(43) Date of publication: 20.07.1983 Bulletin 1983/29 (21) Application number: 82902084.0 (22) Date of filing: 20.07.1982

(51) International Patent Classification (IPC):  B24C 5/ 02( . ) B65D 83/ 14( . ) (86) International application number: PCT/GB1982/000217 (87) International publication number: WO 1983/000315 (03.02.1983 Gazette 1983/04)

(84) Designated Contracting States: AT BE CH DE FR LI LU NL SE (30) Priority: 22.07.1981 GB 19810022549 04.01.1982 GB 19820000081 (71) Applicant: IMPACT TECHNIQUES (IRONVILLE) LIMITED Derbyshire (GB)	(72) Inventors: EDGAR, Paul Wessington, Derbyshire (GB) TAYLOR, Dan Fritchley, Derbyshire (GB)