EP 0321394 B1 19920129 - CLOSING UNIT MADE OF TIN-PLATE, PROCESS FOR MAKING IT AND CONTAINER PROVIDED WITH SUCH A CLOSING UNIT
Title (en)
CLOSING UNIT MADE OF TIN-PLATE, PROCESS FOR MAKING IT AND CONTAINER PROVIDED WITH SUCH A CLOSING UNIT
Publication
Application
Priority
CH 486787 A 19871214
Abstract (en)
[origin: US4915254A] The closure unit can be manufactured in a single deep-drawing operation. During the course of a predetermined stroke of the single deep-drawing operation, such as the downward stroke up to a lower dead-center position, a blank is punched out, a ring or marginal rim and a collar are formed, a central opening is punched out and a section extending peripherally to the cut edge is downwardly extended. During the upward stroke predetermined sections of the extended collar are rolled and subsequently squeezed together.
IPC 1-7
IPC 8 full level
B21D 51/38 (2006.01); B65D 17/50 (2006.01); B65D 77/20 (2006.01)
CPC (source: EP US)
B21D 51/383 (2013.01 - EP US); B65D 17/502 (2013.01 - EP US); B65D 2517/0013 (2013.01 - EP US); B65D 2517/0061 (2013.01 - EP US); B65D 2517/5013 (2013.01 - EP US); B65D 2517/5029 (2013.01 - EP US); B65D 2517/5054 (2013.01 - EP US); B65D 2517/5083 (2013.01 - EP US); B65D 2577/205 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0321394 A1 19890621; EP 0321394 B1 19920129; AT E72188 T1 19920215; CH 674829 A5 19900731; DE 3868254 D1 19920312; ES 2030898 T3 19921116; GR 3004329 T3 19930331; US 4915254 A 19900410; US 5020955 A 19910604
DOCDB simple family (application)
EP 88810796 A 19881121; AT 88810796 T 19881121; CH 486787 A 19871214; DE 3868254 T 19881121; ES 88810796 T 19881121; GR 920400679 T 19920409; US 28030488 A 19881205; US 42320489 A 19891018