(19)

(11)

EP 0 758 423 A1

(12)

(43) Date of publication: 19.02.1997 Bulletin 1997/08 (21) Application number: 95918665.0 (22) Date of filing: 05.05.1995

(51) International Patent Classification (IPC):  E04C 3/ 00( . ) E04C 3/ 292( . ) E04C 3/ 29( . ) (86) International application number: PCT/GB1995/001031 (87) International publication number: WO 1995/030808 (16.11.1995 Gazette 1995/49)

(84) Designated Contracting States: AT DE FR GB NL (30) Priority: 05.05.1994 GB 19940008884 (71) Applicants: OLLIS, William John Bernard Buckinghamshire HP17 8AH (GB) Ollis, William Henry Buckinghamshire HP17 8AH (GB)	(72) Inventors: OLLIS, William John Bernard Buckinghamshire HP17 8AH (GB) Ollis, William Henry Buckinghamshire HP17 8AH (GB) (74) Representative: Jones, Helen Marjorie Meredith  Gill Jennings & Every, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)