(19)

(11)

EP 0 289 488 A1

(12)

(43) Date of publication: 09.11.1988 Bulletin 1988/45 (21) Application number: 86906729.0 (22) Date of filing: 20.11.1986

(51) International Patent Classification (IPC):  E04F 13/ 10( . ) E04F 15/ 04( . ) E04F 13/ 14( . ) E04F 15/ 08( . ) (86) International application number: PCT/AU1986/000355 (87) International publication number: WO 1987/004480 (30.07.1987 Gazette 1987/17)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 21.01.1986 AU 19860004282 (71) Applicant: PACAK, John Beecroft, NSW 2119 (AU)	(72) Inventor: PACAK, John Beecroft, NSW 2119 (AU) (74) Representative: Copp, David Christopher  Dummett Copp & Co. 14 The Square Martlesham Heath Ipswich Suffolk IP5 7SL Ipswich Suffolk IP5 7SL (GB)