(19)

(11)

EP 0 656 089 A1

(12)

(43) Date of publication: 07.06.1995 Bulletin 1995/23 (21) Application number: 93917781.0 (22) Date of filing: 10.08.1993

(51) International Patent Classification (IPC):  E04D 1/ 34( . ) E04D 12/ 00( . ) (86) International application number: PCT/EP1993/002140 (87) International publication number: WO 1994/004775 (03.03.1994 Gazette 1994/06)

(84) Designated Contracting States: BE GB IE NL (30) Priority: 14.08.1992 GB 19920017288 (71) Applicant: REDLAND TECHNOLOGIES LIMITED Reigate, Surrey RH2 0SJ (GB)	(72) Inventor: LAW, Frazer, William, Timothy 52 Hillbury Road London SW17 8UT (GB) (74) Representative: Grant, John Stephen Shirley  Redland PLC Redland House Reigate Surrey RH2 0SJ Reigate Surrey RH2 0SJ (GB)