EP 0271768 B1 19901114 - DEEP-DRAWN ALUMINIUM SCREW CLOSURE FOR GLASS CONTAINERS UNDER PRESSURE, AND DEEP-DRAWING DEVICE FOR THE MANUFACTURE OF THE TOP PORTION OF SUCH A CLOSURE
Title (en)
DEEP-DRAWN ALUMINIUM SCREW CLOSURE FOR GLASS CONTAINERS UNDER PRESSURE, AND DEEP-DRAWING DEVICE FOR THE MANUFACTURE OF THE TOP PORTION OF SUCH A CLOSURE
Publication
Application
Priority
DE 3642998 A 19861217
Abstract (en)
[origin: US4844271A] A deep-drawn screw cap of aluminum for glass bottles under internal pressure, where the transition area between the upper end face 1 to the lateral thread face 2 up to now was always evenly deep-drawn, now is to have at least one undeformed partial area 8. Because of this, sealing against the lateral edge 7 of the mouth is partially disrupted and a chance for the escape of gas is purposely provided in case the internal pressure in the glass bottle should rise too high. If required, a plurality of such partial areas 8 may be provided. In the deep-drawing device for a sealing head for the production of such screw caps the inner recess 12 should provide at least one partial enlargement 14 oriented towards the center axis 13 and extending approximately to the diameter of the preceding recess 11.
IPC 1-7
IPC 8 full level
B21D 51/50 (2006.01); B65D 41/04 (2006.01); B65D 51/16 (2006.01)
CPC (source: EP US)
B65D 41/0464 (2013.01 - EP US); B65D 51/1661 (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)
US 4844271 A 19890704; AT E58350 T1 19901115; DE 3642998 C1 19880519; DE 3766231 D1 19901220; EP 0271768 A1 19880622; EP 0271768 B1 19901114; ES 2018671 B3 19910501; JP S63162466 A 19880706
DOCDB simple family (application)
US 13122987 A 19871210; AT 87117793 T 19871202; DE 3642998 A 19861217; DE 3766231 T 19871202; EP 87117793 A 19871202; ES 87117793 T 19871202; JP 31763987 A 19871217