(19)

(11)

EP 0 472 540 A1

(12)

(43) Date of publication: 04.03.1992 Bulletin 1992/10 (21) Application number: 90906772.0 (22) Date of filing: 15.05.1990

(51) International Patent Classification (IPC):  H01B 13/ 004( . ) H01B 13/ 14( . ) (86) International application number: PCT/AU1990/000198 (87) International publication number: WO 1990/014671 (29.11.1990 Gazette 1990/27)

(84) Designated Contracting States: FR GB IT (30) Priority: 17.05.1989 AU 19890004217 (71) Applicant: METAL MANUFACTURES LIMITED Pymble, New South Wales 2073 (AU)	(72) Inventor: THOMPSON, Michael, Anthony North Noble Park, VIC 3173 (AU) (74) Representative: Ross Gower, Edward Lewis  BICC plc, Patents and Licensing Department, Quantum House, Maylands Avenue Hemel Hempstead, Hertfordshire HP2 4SJ Hemel Hempstead, Hertfordshire HP2 4SJ (GB)