(19)

(11)

EP 0 815 332 A2

(12)

(43) Date of publication: 07.01.1998 Bulletin 1998/02 (21) Application number: 96911317.0 (22) Date of filing: 15.03.1996

(51) International Patent Classification (IPC):  B21D 47/ 00( . ) E04C 2/ 08( . ) (86) International application number: PCT/US1996/003577 (87) International publication number: WO 1996/030604 (03.10.1996 Gazette 1996/44)

(84) Designated Contracting States: ES GR IT PT (30) Priority: 17.03.1995 ZA 19950002234 (71) Applicant: McGregor, Duncan Clift Scottburgh, 4180 (ZA)	(72) Inventor: McGREGOR, Duncan, Clift Scottburgh, 4180 (ZA) (74) Representative: Morton, Colin David  Keith W Nash & Co. Pearl Assurance House 90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)