(19)

(11)

EP 0 904 169 A1

(12)

(43) Date of publication: 31.03.1999 Bulletin 1999/13 (21) Application number: 97919973.0 (22) Date of filing: 31.03.1997

(51) International Patent Classification (IPC):  B21D 51/ 26( . ) (86) International application number: PCT/US1997/005205 (87) International publication number: WO 1997/039848 (30.10.1997 Gazette 1997/46)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE (30) Priority: 22.04.1996 US 19960636040 04.12.1996 US 19960759189 (71) Applicant: Crown Cork & Seal Technologies Corporation Alsip, IL 60482 (US)	(72) Inventor: ASCHBERGER, Anton, A. Downers Grove, IL 60516 (US) (74) Representative: Gadsden, Robert Edward  CarnaudMetalbox Plc, Downsview Road Wantage, Oxon OX12 9BP Wantage, Oxon OX12 9BP (GB)