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Priority to ES112299UpriorityCriticalpatent/ES112299Y/en
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Publication of ES112299YpublicationCriticalpatent/ES112299Y/en
Airtight closing lid characterized by the fact that part of a sheet of suitable shape and size whose vertices receive a marked and corresponding angular fold that determines a bellows towards the interior having this bellows one of its parts adhered to the adjacent side so that in the folding two sides facing each other are overlapped and the lifting operation will automatically originate the elevation of the other sides thus creating the lid of the box or container. (Machine-translation by Google Translate, not legally binding)
ES112299U1965-06-081965-06-08
ASSEMBLY LID WITH HERMETIC CLOSURE.
ExpiredES112299Y
(en)
Procedure for hermetic closure of boxes intended to contain ice-created or frozen foods. (Machine-translation by Google Translate, not legally binding)