(19)

(11)

EP 0 032 148 A1

(12)

(43) Date of publication: 22.07.1981 Bulletin 1981/29 (21) Application number: 80901390.0 (22) Date of filing: 18.07.1980

(51) International Patent Classification (IPC):  B23D 21/ 06( . ) B23D 21/ 08( . ) B23B 5/ 16( . ) (86) International application number: PCT/AU1980/000035 (87) International publication number: WO 1981/000225 (05.02.1981 Gazette 1981/04)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (30) Priority: 18.07.1979 AU 19790009625 01.08.1979 AU 19790009831 (71) Applicant: RAST PATENT MANUFACTURERS PTY LIMITED North Plympton, S.A. 5037 (AU)	(72) Inventor: RAST, Wlodzimierz North Adelaide, S.A. 5006 (AU) (74) Representative: Cheyne, John Robert Alexander Mackenzie  HASELTINE LAKE & CO. 28 Southampton Buildings Chancery Lane London WC2A 1AT London WC2A 1AT (GB)