EP 0017434 A1 19801015 - Cup-shaped containers and method and apparatus for manufacturing them.
Title (en)
Cup-shaped containers and method and apparatus for manufacturing them.
Title (de)
Dosenförmige Behälter sowie Verfahren und Vorrichtung zu deren Herstellung.
Title (fr)
Réceptacles en forme de boîte et procédé et dispositif pour leur fabrication.
Publication
Application
Priority
GB 7912327 A 19790407
Abstract (en)
A cup-shaped container is formed from a metal blank (13) by forcing the blank (13), carried by a mandrel (50) through a drawing die (21) to shape the blank (13) with a base (14) and an elongate cylindrical wall (15), and ironing dies (22,23) to thin and extend the cylindrical wall (15) along the mandrel (50). The mandrel (50) has circumferential a groove (57) into which metal is caused to flow during the ironing step and adjacent the groove (57) is a severing die (56) which co-operates with an ironing die (23) to trim the rim of the cylindrical wall (15) adacent the groove (57). The resultant container has an inner circumferential bead (60) at the rim, which strengthens the container and reduces the incidence of splitting.
IPC 1-7
IPC 8 full level
B21D 22/28 (2006.01); B21D 22/30 (2006.01)
CPC (source: EP)
B21D 22/28 (2013.01); B21D 22/30 (2013.01)
Citation (search report)
- DE 2256334 A1 19740522 - WMF WUERTTEMBERG METALLWAREN
- CH 550620 A 19740628 - KM ENGINEERING AG
- DE 2508828 A1 19751002 - YOSHIZAKI KOZO
- US 3610018 A 19711005 - SWANSON WILLIAM D, et al
- GB 1467707 A 19770323 - TOYO SEIKAN KAISHA LTD
- DE 1602538 A1 19700305 - RASSELSTEIN AG
- DE 582448 C 19330815 - EPOS ALUMINIUM WERK E PFAENDLE
- DE 1527947 C
Designated contracting state (EPC)
BE CH DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0017434 A1 19801015; EP 0017434 B1 19830323; AU 5715980 A 19801009; DE 3062402 D1 19830428; ES 490321 A0 19810416; ES 8104733 A1 19810416
DOCDB simple family (application)
EP 80300961 A 19800327; AU 5715980 A 19800403; DE 3062402 T 19800327; ES 490321 A 19800407