(19)

(11)

EP 1 687 106 A1

(12)

(43) Date of publication: 09.08.2006 Bulletin 2006/32 (21) Application number: 04819722.2 (22) Date of filing: 26.11.2004

(51) International Patent Classification (IPC):  B21D 47/01(2006.01) E04C 3/08(2006.01) (86) International application number: PCT/GB2004/005016 (87) International publication number: WO 2005/053873 (16.06.2005 Gazette 2005/24)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 28.11.2003 GB 0327896 (71) Applicant: WESTOK LIMITED Horbury WF4 5ER (GB)	(72) Inventor: HOLMES, Andrew Horbury, WF4 5ER (GB) (74) Representative: Stuttard, Garry Philip  Urquhart-Dykes & Lord LLP Tower North Central Merrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)