Crown Cork & Seal Technologies Corporation

Crown Cork Ag

Georg Pfefferkorn

Michael Kirchgessner

Udo Bosl

Udo B&ouml;sl

A closure cap comprises in a transition range ( ) between the cap base ( ) and the cap skirt ( ) a bulge ( ) for pressing a sealing disk ( ) against a container opening. The bulge ( ) comprises an undercut ( ) and in sections ( ) is provided with weakenings ( ) which give the bulge ( ) a radial flexibility.

Closure cap

A closure cap ( ) with a cap base ( ) and with a cap skirt ( ) comprises an inner seal ( ). The inner seal is provided with bleeding reliefs ( ) which lift the sealing effect as soon as the cap base ( ) is displaced axially upwards. The closure cap ( ) comprises a first abutment and a second abutment ( ). On screwing-on firstly the second abutment ( ) comes into engagement with the container opening. By way of this a weakening zone ( ) in the region of the cap base ( ) is pretensioned to a predeterminable value. On account of the predeterminable pretensioning of the weakening zone ( ) a bleeding at an exactly defined excess pressure is possible.

Venting closure

A closure cap ( ) for a container consists essentially of a cap base ( ), of a cap skirt ( ) and of a sealing disk ( ) which bears at least partly on the cap base ( ). A circumferential bulge ( ) is arranged in the transition region ( ) between the cap base ( ) and the cap skirt ( ). The bulge ( ) serves for pressing the sealing disk ( ) onto the container opening. The bulge ( ) is divided by interruptions ( ) into several blocks ( ). On the inner side ( ) of the cap base ( ) there is arranged at least one rib ( ) running radially outwards. The, rib seen in the circumferential direction, is located neighboring one of the interruptions.

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Müllheim, Germany

Georg Pfefferkorn