(19)

(11)

EP 0 172 904 A1

(12)

(43) Date of publication: 05.03.1986 Bulletin 1986/10 (21) Application number: 85901478.0 (22) Date of filing: 08.03.1985

(51) International Patent Classification (IPC):  E04B 1/ 76( . ) E04D 13/ 17( . ) E04D 13/ 16( . ) (86) International application number: PCT/GB1985/000096 (87) International publication number: WO 1985/004206 (26.09.1985 Gazette 1985/21)

(84) Designated Contracting States: AT BE CH DE FR LI NL SE (30) Priority: 09.03.1984 GB 19840006222 (71) Applicant: ALTONA INVEST S.A. Luxembourg (LU)	(72) Inventor: BUTCHER, David Henry Stanford House Sussex RH13 7RR (GB)