(19)

(11)

EP 0 101 697 A1

(12)

(43) Date of publication: 07.03.1984 Bulletin 1984/10 (21) Application number: 83900693.0 (22) Date of filing: 25.02.1983

(51) International Patent Classification (IPC):  E04B 2/ 56( . ) (86) International application number: PCT/AU1983/000027 (87) International publication number: WO 1983/003112 (15.09.1983 Gazette 1983/21)

(84) Designated Contracting States: CH DE FR GB LI NL SE (30) Priority: 01.03.1982 AU 19820002897 (71) Applicant: CLAYTON, Edward Michael Sumner Park QLD 4074 (AU)	(72) Inventor: CLAYTON, Edward Michael Sumner Park QLD 4074 (AU)