(19)

(11)

EP 0 536 247 A1

(12)

(43) Date of publication: 14.04.1993 Bulletin 1993/15 (21) Application number: 91912278.0 (22) Date of filing: 26.06.1991

(51) International Patent Classification (IPC):  E02D 29/ 14( . ) (86) International application number: PCT/GB1991/001037 (87) International publication number: WO 1992/000426 (09.01.1992 Gazette 1992/02)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 26.06.1990 GB 19900014161 (71) Applicant: FIRSTEEL DISTRIBUTORS LIMITED Walsall, West Midlands WS5 4AX (GB)	(72) Inventor: NORRIS, David, Walter Dudley West Midlands DY1 2HH (GB) (74) Representative: Lewis, Samuel Hewitt  FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 D-80801 München D-80801 München (DE)