(19)

(11)

EP 0 020 346 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 79900676.0 (22) Date of filing: 27.06.1979

(51) International Patent Classification (IPC):  B25D 17/ 28( . ) B28D 1/ 26( . ) (86) International application number: PCT/GB1979/000106 (87) International publication number: WO 1980/001367 (10.07.1980 Gazette 1980/15)

(84) Designated Contracting States: DE FR GB SE (30) Priority: 29.12.1978 GB 19500034678 (71) Applicant: JOAD ENGINEERING LIMITED Leicester LE4 7LL (GB)	(72) Inventor: FURBY, Jim Willoughby-on-the-Wolds Leicestershire (GB)