Some improvements in the treatment of aluminum and tin plates to increase its rigidity and improve its presentation (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the treatment of aluminum and tin plates to increase their rigidity and improve their presentation, which are characterized by embossing or rather warping the surface of the sheets in longitudinal and transverse directions using two matrices or flat dies attached to the plates of a press; the useful and flat surfaces of these dies being provided with a series of evenly distributed stops; the stops of one die coinciding with the free spaces of the other, so that when pressed, the simultaneous formation of projections is produced for each of the sheet metal joined by twisted corrugations according to the two longitudinal and transverse axes thereof. (Machine-translation by Google Translate, not legally binding)