(19)

(11)

EP 0 551 500 A1

(12)

(43) Date of publication: 21.07.1993 Bulletin 1993/29 (21) Application number: 92917592.0 (22) Date of filing: 31.07.1992

(51) International Patent Classification (IPC):  B21F 15/ 06( . ) B65B 13/ 28( . ) B21F 27/ 08( . ) E04G 21/ 12( . ) (86) International application number: PCT/US1992/006363 (87) International publication number: WO 1993/002816 (18.02.1993 Gazette 1993/05)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 02.08.1991 US 19910739612 (71) Applicant: GATEWAY CONSTRUCTION COMPANY, INC. Chicago, IL 60651 (US)	(72) Inventor: FORSYTH, Eugene, E. Austin, AR 72007 (US) (74) Representative: Nicholls, Kathryn Margaret, et al  MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)