(19)

(11)

EP 0 238 563 A1

(12)

(43) Date of publication: 30.09.1987 Bulletin 1987/40 (21) Application number: 86905688.0 (22) Date of filing: 07.10.1986

(51) International Patent Classification (IPC):  E04H 17/ 12( . ) (86) International application number: PCT/AU1986/000293 (87) International publication number: WO 1987/002429 (23.04.1987 Gazette 1987/09)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 08.10.1985 AU 19850002789 22.10.1985 AU 19850003019 20.01.1986 AU 19860004270 (71) Applicant: NOMMACK (NO.20) PTY. LIMITED Sydney, NSW 2000 (AU)	(72) Inventors: INNES, Stuart, Martin Woollahra, NSW 2025 (AU) CHRISTOPHER, Ernest, Steven Alfredton, VIC 3350 (AU)