Global Patent Index - EP 0972588 A3

EP 0972588 A3 20010131 - Method for producing metal rings

Title (en)

Method for producing metal rings

Title (de)

Verfahren zur Herstellung von Blechringen

Title (fr)

Procédé de fabrication d'anneaux métalliques

Publication

EP 0972588 A3 20010131 (DE)

Application

EP 99102001 A 19990201

Priority

DE 19831189 A 19980711

Abstract (en)

[origin: EP0972588A2] A continuous source material (3) is formed into rings (5) and cut to size. The ring ends (6,7) are butt welded, and the rings are finished by plastic forming at room temperature. The side walls (9,10) are parallel to each other. Rings are formed and cut by a roller and cutter machine, and the rings are cut individually. The source material is pre-formed and has an approx. oval cross section.

IPC 1-7

B21F 37/00; B21K 1/76

IPC 8 full level

B21F 45/04 (2006.01); B21D 53/16 (2006.01); B21F 37/00 (2006.01); B21F 37/04 (2006.01); B21K 1/76 (2006.01)

CPC (source: EP KR)

B21D 53/16 (2013.01 - EP); B21F 37/00 (2013.01 - EP); B21F 37/04 (2013.01 - EP); B21F 45/04 (2013.01 - KR); B21K 1/761 (2013.01 - EP)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0972588 A2 20000119; EP 0972588 A3 20010131; BR 9902670 A 20000308; DE 19831189 A1 20000120; KR 20000011605 A 20000225

DOCDB simple family (application)

EP 99102001 A 19990201; BR 9902670 A 19990709; DE 19831189 A 19980711; KR 19990027679 A 19990709