(19)

(11)

EP 0 879 103 A1

(12)

(43) Date of publication: 25.11.1998 Bulletin 1998/48 (21) Application number: 96916254.0 (22) Date of filing: 07.06.1996

(51) International Patent Classification (IPC):  B21D 13/ 02( . ) E04C 2/ 32( . ) B21D 13/ 04( . ) (86) International application number: PCT/GB1996/001365 (87) International publication number: WO 1996/041691 (27.12.1996 Gazette 1997/04)

(84) Designated Contracting States: BE CH DE FR GB IE LI NL (30) Priority: 10.06.1995 GB 19950011847 (71) Applicant: METSEC PLC Oldbury, Warley B69 4HE (GB)	(72) Inventors: JAMES, Samuel Tipton, West Midlands DY4 0EN (GB) SALT, Ernest, Graham Sutton Coldfield, West Midlands B75 6BP (GB) (74) Representative: Carpenter, David  MARKS & CLERK, Alpha Tower, Suffolk Street Queensway Birmingham B1 1TT Birmingham B1 1TT (GB)