(19)

(11)

EP 0 512 984 A1

(12)

(43) Date of publication: 19.11.1992 Bulletin 1992/47 (21) Application number: 90907607.0 (22) Date of filing: 26.01.1990

(51) International Patent Classification (IPC):  B21D 22/ 10( . ) B21D 22/ 30( . ) B21D 22/ 28( . ) B21D 51/ 26( . ) (86) International application number: PCT/US1990/000451 (87) International publication number: WO 1991/011275 (08.08.1991 Gazette 1991/18)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (71) Applicant: AMERICAN NATIONAL CAN COMPANY Chicago, Illinois 60631 (US)

(72) Inventors: HALASZ, Andrew Crystal Lake, IL 60012 (US) PRATURLON, Sylvan Chicago, IL 60615 (US) Moloney, Thomas E. Wheaton, Illinois 60187 (US) Chernikoff, Nelson N. Richton Park, Illinois 60471 (US) Zenger, Richard D. Downers Grove, Illinois 60515 (US) Cassidy, Edward K. Palatine, Illinois 60067 (US) Mann, John M. Illinois60515 (US) (74) Representative: Lawrence, John Gordon, et al  McNeight & Lawrence Regent House Heaton Lane Stockport, Cheshire SK4 1BS Stockport, Cheshire SK4 1BS (GB)