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Priority to ES0023139UpriorityCriticalpatent/ES23139U/en
Publication of ES23139UpublicationCriticalpatent/ES23139U/en
An automatic closing by spiral springs, characterized in that it consists of two of them each of which is located parallel with the opposite in the corresponding strip of fabric in order to fit together. The spring on the left is a current-type spiral that when operated the slide is housed in the spring on the right thanks to a ripple that is provided in each of its spirals, causing closure by the intimate union of both . (Machine-translation by Google Translate, not legally binding)
ES0023139U1950-05-061950-05-06An automatic closing by means of spiral springs (Machine-translation by Google Translate, not legally binding)
PendingES23139U
(en)