(19)

(11)

EP 0 433 342 A1

(12)

(43) Date of publication: 26.06.1991 Bulletin 1991/26 (21) Application number: 89910049.0 (22) Date of filing: 06.09.1989

(51) International Patent Classification (IPC):  B29C 70/ 02( . ) B29C 70/ 88( . ) E21D 21/ 00( . ) B29C 70/ 82( . ) B29D 1/ 00( . ) (86) International application number: PCT/AU1989/000378 (87) International publication number: WO 1990/002866 (22.03.1990 Gazette 1990/07)

(84) Designated Contracting States: DE FR GB (30) Priority: 06.09.1988 AU 19880000273 16.11.1988 AU 19880001495 23.06.1989 AU 19890004880 (71) Applicant: NEWKEM AUSTRALIA PTY LIMITED Nowra, NSW 2541 (AU)	(72) Inventor: TOOTH, Peter North Nowra, NSW 2541 (AU) (74) Representative: Powell, Stephen David, et al  WILLIAMS, POWELL & ASSOCIATES 34 Tavistock Street London WC2E 7PB London WC2E 7PB (GB)