(19)

(11)

EP 0 822 889 A1

(12)

(43) Date of publication: 11.02.1998 Bulletin 1998/07 (21) Application number: 96904178.0 (22) Date of filing: 27.02.1996

(51) International Patent Classification (IPC):  B28B 7/ 22( . ) B28B 7/ 36( . ) (86) International application number: PCT/GB1996/000437 (87) International publication number: WO 1997/031763 (04.09.1997 Gazette 1997/38)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (71) Applicant: Tarmac Heavy Building Materials UK Limited Wolverhampton, West Midlands WV8 2HZ (GB)	(72) Inventor: OGDEN, Peter, Wallis Warrington,Cheshire WA4 4DY (GB) (74) Representative: Lucking, David John, et al  FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 80801 München 80801 München (DE)