Global Patent Index - EP 1088905 A1

EP 1088905 A1 2001-04-04 - STEEL SHEET FOR ULTRA-THIN TWO-PIECE CANS HAVING EXCELLENT ANTI-WRINKLING PROPERTIES AND METHOD FOR PRODUCING THEREOF

Title (en)

STEEL SHEET FOR ULTRA-THIN TWO-PIECE CANS HAVING EXCELLENT ANTI-WRINKLING PROPERTIES AND METHOD FOR PRODUCING THEREOF

Title (de)

STAHLBLECH FÜR ULTRADÜNNE DOSEN MIT HERVORRAGENDER ANTI-FALTEIGENSCHAFTEN UND VERFAHREN ZU DESSEN HERSTELLUNG

Title (fr)

TOLE D'ACIER ULTRA MINCE POUR BOITE BOISSON AYANT UNE RÉSISTANCE À LA FORMATION DE PLI ET PROCEDE DE PRODUCTION ASSOCIE

Publication

EP 1088905 A1 (EN)

Application

EP 00915519 A

Priority

  • JP 0002426 W
  • JP 11285299 A

Abstract (en)

The present invention provides a steel sheet for a two-piece can characterized in that the equation, (N existing as AlN)/(N content)>0.5, is satisfied, the average diameter of AlN is in the range of 0.01 to 0.10 mu m, the ratio of the number of AlN with a diameter of 0.01 mu m or less to the number of AlN with a diameter of at least 0.005 mu m is 10% or less, the average diameter of MnS is in the range of 0.03 to 0.40 mu m, and the ratio of the number of MnS with a diameter of 0.03 mu m or less to the number of MnS with a diameter of at least 0.005 mu m is 50% or less. Further, by specifying chemical composition, slab reheating temperature and coiling temperature in hot rolling, and re-cold-rolling reduction ratio after annealing, a high yield of steel sheet and good can formability can be achieved, the wrinkle generation rate during neck diameter reduction after drawing, ironing and stretching can be reduced and, further, good properties can be obtained even processed at a low annealing temperature. Thus the production of a highly efficient steel sheet for a two-piece can capable of averting heat-buckle is made possible. Further, buckling generation at an annealing process, earing generation during cup forming and wrinkle generation during the diameter reduction of a can body opening can be avoided. And thus a steel sheet for a two-piece can with a thickness of 0.19mm or less can be provided. <IMAGE>

IPC 1-7 (main, further and additional classification)

C22C 38/04; C21D 8/04; C21D 9/46; C22C 38/06

IPC 8 full level (invention and additional information)

C21D 8/04 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01)

CPC (invention and additional information)

C21D 8/0436 (2013.01); C21D 8/04 (2013.01); C21D 8/0468 (2013.01); C22C 38/004 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C21D 8/041 (2013.01); C21D 8/0426 (2013.01)

Designated contracting state (EPC)

DE FR GB NL

EPO simple patent family

EP 1088905 A1 20010404; EP 1088905 A4 20041201; EP 1088905 B1 20091007; DE 60043087 D1 20091119; JP 4213870 B2 20090121; WO 0063453 A1 20001026

INPADOC legal status


2017-04-28 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2016-07-29 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2016-03-09 [REG FR PLFP] FEE PAYMENT

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2013-09-04 [R26] OPPOSITION FILED (CORRECTION)

- Opponent name: ARCELORMITTAL FRANCE

- Effective date: 20100706

2013-04-18 [REG DE R081] CHANGE OF APPLICANT/PATENTEE

- Owner name: NIPPON STEEL & SUMITOMO METAL CORPORATION, JP

- Free text: FORMER OWNER: NIPPON STEEL CORP., TOKIO/TOKYO, JP

- Document: DE 60043087

- Effective date: 20130227

2013-04-18 [REG DE R082] CHANGE OF REPRESENTATIVE

- Document: DE 60043087

- Representative's name: VOSSIUS & PARTNER, DE

- Effective date: 20130227

2013-04-18 [REG DE R082] CHANGE OF REPRESENTATIVE

- Document: DE 60043087

- Representative's name: VOSSIUS & PARTNER PATENTANWAELTE RECHTSANWAELT, DE

- Effective date: 20130227

2013-01-23 [RAP2] TRANSFER OF RIGHTS OF AN EP GRANTED PATENT

- Owner name: NIPPON STEEL & SUMITOMO METAL CORPORATION

2010-08-11 [26] OPPOSITION FILED

- Opponent name: ARCELORMITTAL FRANCE

- Effective date: 20100706

2009-11-19 [REF] CORRESPONDS TO:

- Document: DE 60043087 P 20091119

2009-10-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB NL

2009-10-07 [REG GB FG4D] EUROPEAN PATENT GRANTED

2009-04-08 [RTI1] TITLE (CORRECTION)

- Free text: STEEL SHEET FOR ULTRA-THIN TWO-PIECE CANS HAVING EXCELLENT ANTI-WRINKLING PROPERTIES AND METHOD FOR PRODUCING THEREOF

2007-02-14 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20060214

2004-12-01 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20041018

2004-11-24 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 22C 38/04 A

2004-11-24 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 22C 38/06 B

2004-11-24 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 21D 9/46 B

2004-11-24 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 21D 8/04 B

2004-05-19 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): DE FR GB NL

2001-04-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010116

2001-04-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE