(19)

(11)

EP 0 548 100 A1

(12)

(43) Date of publication: 30.06.1993 Bulletin 1993/26 (21) Application number: 91914804.0 (22) Date of filing: 19.08.1991

(51) International Patent Classification (IPC):  B23K 9/ 133( . ) B23K 35/ 04( . ) B23K 35/ 02( . ) (86) International application number: PCT/AU1991/000374 (87) International publication number: WO 1992/003251 (05.03.1992 Gazette 1992/06)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 20.08.1990 AU 19900001842 (71) Applicant: WELDING INDUSTRIES LIMITED Melrose Park, S.A. 5483 (AU)	(72) Inventors: CHEESMAN, Gary, Lyn Coromandel East, S.A. 5051 (AU) BROUGHAM, William, Kenneth Novar Gardens, S.A. 5040 (AU) (74) Representative: Neill, Alastair William  APPLEYARD LEES 15 Clare Road Halifax, West Yorkshire HX1 2HY Halifax, West Yorkshire HX1 2HY (GB)