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
Application
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
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)
- [X] US 1377266 A 19210510 - FRANK MOSSBERG
- [X] EP 0163769 A2 19851211 - ISRAEL STATE [IL]
- [XP] WO 9845067 A1 19981015 - ALCAN RORSCHACH AG [CH], et al
- [A] DE 2838128 A1 19800306 - GOETZE AG
- [A] DE 3523091 A1 19870102 - FEUCHTENBERGER IRMGARD [DE]
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