EP 0298230 B1 19921119 - METHOD AND APPARATUS FOR MAKING CANS WITH A TRUNCATED PYRAMIDAL SHAPE
Title (en)
METHOD AND APPARATUS FOR MAKING CANS WITH A TRUNCATED PYRAMIDAL SHAPE
Publication
Application
Priority
CH 257187 A 19870707
Abstract (en)
[origin: EP0298230A2] Circular-cylindrical bodies (2) are formed from rectangular sheet-metal blanks by rounding and longitudinal seam welding. In a first spreading operation, these bodies are expanded into an oval cone over their entire length and then relieved of stress again. In a second spreading operation, the bodies (2) are then expanded in such a way that they receive their polygonal, in particular rectangle-like cross-sectional shape over their entire length. The bodies are thereby put under stress at their end edge zones in such a way that these edge zones do not become wavy and can therefore be connected easily to a can lid or base. <IMAGE>
IPC 1-7
IPC 8 full level
B21D 39/20 (2006.01); B21D 51/26 (2006.01)
CPC (source: EP KR US)
B21D 51/26 (2013.01 - KR); B21D 51/2646 (2013.01 - EP US); Y10S 72/715 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE ES FR GB GR IT LI NL SE
DOCDB simple family (publication)
EP 0298230 A2 19890111; EP 0298230 A3 19900718; EP 0298230 B1 19921119; AU 1676988 A 19890112; AU 622111 B2 19920402; BR 8803368 A 19890131; CH 673790 A5 19900412; CN 1013482 B 19910814; CN 1030372 A 19890118; DE 3725186 A1 19890119; DE 3725186 C2 19901018; DE 3876019 D1 19921224; DK 378388 A 19890108; DK 378388 D0 19880707; FI 882827 A0 19880614; FI 882827 A 19890108; GR 3006879 T3 19930630; JP H01215420 A 19890829; JP H0353056 B2 19910813; KR 890001652 A 19890328; KR 920004664 B1 19920613; NO 169639 B 19920413; NO 169639 C 19920722; NO 883017 D0 19880706; NO 883017 L 19890109; SU 1625323 A3 19910130; US 4901557 A 19900220; US 5000370 A 19910319; ZA 884213 B 19900228
DOCDB simple family (application)
EP 88108120 A 19880520; AU 1676988 A 19880530; BR 8803368 A 19880706; CH 257187 A 19870707; CN 88103545 A 19880610; DE 3725186 A 19870729; DE 3876019 T 19880520; DK 378388 A 19880707; FI 882827 A 19880614; GR 920402666 T 19930126; JP 16700688 A 19880706; KR 880008381 A 19880706; NO 883017 A 19880706; SU 4356062 A 19880706; US 20520388 A 19880610; US 42823589 A 19891027; ZA 884213 A 19880613