Caracaracteres master typographic perfected. (Machine-translation by Google Translate, not legally binding)

摘要

Improved typographic master brackets, of the type comprising a processed photographic emulsion that is contoured according to a circular crown, in which radial alignments of signs are shown in negative, which are also concentrically aligned; characterized essentially in that said photographic emulsion is disposed between two transparent discoidal bodies which, provided with the means for fastening to a carrier plate, constitute stiffeners and protectors for said photographic emulsion. (Machine-translation by Google Translate, not legally binding)