Charter card for interchangeable indications. (Machine-translation by Google Translate, not legally binding)

摘要

"Carrier chart of interchangeable indications", characterized essentially by the fact that it is constituted by two laminar bodies, of transparent nature, superimposed and joined by their upper and lower edges, while at their side edges they are endowed with suitable closing means, that allow the access through them to a series of boxes, configured, between the bodies first cited, by welding lines, transverse and, longitudinal, to accommodate the corresponding indications that are thus protected between said two bodies, being susceptible of exchange, through the aforementioned lateral closures. (Machine-translation by Google Translate, not legally binding)