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Individual
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Individual
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Priority to ES1971171817UpriorityCriticalpatent/ES171817Y/en
Publication of ES171817UpublicationCriticalpatent/ES171817U/en
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Publication of ES171817YpublicationCriticalpatent/ES171817Y/en
A perfected envelope, of the type consisting of a rectangular sheet divided transversely by a folding line in two approximately equal portions, one of whose portions incorporates between its edges adjacent to said folding line two flaps of fastening by gluing the another portion, and is additionally provided with a folding case provided in continuation of its free edge, which has the purpose of closing the envelope when both portions are joined by the marginal flaps, while the other has a window opened by a transparent sheet, which is characterized essentially by the fact that this latter portion, in continuation, has its end edge of a wide flap, of its same width but somewhat shorter, than, being separated from it by a centered transverse cut, which covers almost its dimension in that sense, it can be collapsed on the inner side of said second portion and join marginally with the same ma, in order to form an internal supplementary bag. (Machine-translation by Google Translate, not legally binding)