Porta maps. (Machine-translation by Google Translate, not legally binding)

摘要

Porta-maps, which is of the type derived from a paper sheet on the surface va printed or lithographed map concerned, constituting what is considered as a map of pocket essentially characterized in that said foil paper presents a series of fold lines cross and lines longitudinal series, also folding, determined sections equal, two of which rectangulares, situated opposite diagonal, are secured by any conventional sendas roofing system material hard same outline the sections referred to above, all so that the fold total across the lines cross is performed bellows, while the fold belt originated overlapping different strips obtained in the fold previous form is performed in zig-zag. (Machine-translation by Google Translate, not legally binding)