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AUGUST RUEF M
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AUGUST RUEF M
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Application filed by AUGUST RUEF MfiledCriticalAUGUST RUEF M
Priority to ES0000077UpriorityCriticalpatent/ES77Y/en
Publication of ES77UpublicationCriticalpatent/ES77U/en
Application grantedgrantedCritical
Publication of ES77YpublicationCriticalpatent/ES77Y/en
An inviolable button closure for envelopes of letters, seals and their like, characterized in that the parts of the closure are composed of two sockets with a base of essentially equal size and shape, these sockets being organized in such a way that their intimate and reciprocal lace, namely: in the open sockets a winding of its edges and sides together, and in the sockets closed at the top a lace of its edges and a trapping of the edges of the lower sleeve by those of the upper one. (Machine-translation by Google Translate, not legally binding)