(19)

(11)

EP 0 917 611 A1

(12)

(43) Date of publication: 26.05.1999 Bulletin 1999/21 (21) Application number: 97931590.0 (22) Date of filing: 29.07.1997

(51) International Patent Classification (IPC):  E04C 5/ 04( . ) E04C 5/ 06( . ) (86) International application number: PCT/AU1997/000479 (87) International publication number: WO 1998/004792 (05.02.1998 Gazette 1998/05)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 29.07.1996 AU 1996PO01269 (71) Applicant: Ironbarks Systems Pty. Ltd Chatswood, NSW 2067 (AU)	(72) Inventor: WYLIE, John, Hamilton, Maulsden Chatswood, NSW 2067 (AU) (74) Representative: Plaçais, Jean-Yves  Cabinet Netter, 40, rue Vignon 75009 Paris 75009 Paris (FR)