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Individual
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Individual
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Priority to ES0201210UpriorityCriticalpatent/ES201210U/en
Publication of ES201210UpublicationCriticalpatent/ES201210U/en
Closing device for containers, characterized essentially by the fact that on the internal face of the bottom of the stopper, with a completely smooth surface, resting on the edge of the mouth of the container or reservoir, there is disposed an elastic washer provided, in the face adjacent to the bottom of the plug, of a rib that forms a continuous spiral, determining a channel that constitutes the conduit for ventilation of the interior of the container or reservoir. (Machine-translation by Google Translate, not legally binding)
ES0201210U1974-03-061974-03-06Closing device for container (Machine-translation by Google Translate, not legally binding)
PendingES201210U
(en)
Improvements in the construction of a shuttering reverse for an opening in the wall of a recipient (Machine-translation by Google Translate, not legally binding)