Perfections introduced in the object of the main patent nº 198410 that refers to procedure to engrave opaxita (Machine-translation by Google Translate, not legally binding)

摘要

Perfections introduced in the object of the main patent no. 198,410 which refers to a process for engraving opaxite according to which the plates or sheets of black glass are cut by beveling and/or finishing off their edges and edges and then being covered with a thin film of an pasty material or in fine state of division and transport on it the interested drawings to proceed to its emptying by lathe at a speed of approximately 8000 rpm using a carborundum or diamond cutting wheel characterized further by the fact of producing on said black glass plates certain perforations or openings to allow the placement of bronze applications or pastes conveniently configured as own allegories for the use of the black glass plates. (Machine-translation by Google Translate, not legally binding)