(19)

(11)

EP 0 161 255 A1

(12)

(43) Date of publication: 21.11.1985 Bulletin 1985/47 (21) Application number: 84900484.0 (22) Date of filing: 12.01.1984

(51) International Patent Classification (IPC):  B21D 5/ 06( . ) E04C 3/ 02( . ) E04B 7/ 02( . ) (86) International application number: PCT/AU1984/000006 (87) International publication number: WO 1984/002666 (19.07.1984 Gazette 1984/17)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 13.01.1983 AU 19830007595 (71) Applicant: SILVERTAPE PTY.LTD. Clayfield, QLD 4011 (AU)	(72) Inventor: LEE, Ambrose, Ronald Kingscliff, NSW 2487 (AU)