7 Machines and equipment for processing and printing substrates, namely, printing machines for industrial use, cardboard processing machines, all for processing and printing sheets, plates, blanks, and webs, of paper, cardboard, corrugated board, and plastic, for the packaging industry; equipment and machines for converting and printing paper, cardboard, corrugated board, and plastic, namely, machines for folding and gluing substrates, in the nature of sheets, plates, blanks, of paper, cardboard, corrugated cardboard, and plastic; devices and apparatus for loading, feeding, multiple insertion, positioning, transporting, stacking, namely loading and unloading machines, conveyors, sheet-inserting machines, roller transfer units for use in conveyor system, and stacking machines; devices and apparatus for separating, receiving, handling, counting, sampling, packaging, packing and conveying from machines of converted, printed, folded and glued substrates in the nature of sheets, plates, blanks of paper, cardboard, corrugated cardboard, and plastic, namely, packing machines; control devices for the aforesaid machines, equipment, devices and apparatus, namely, pneumatic and hydraulic controls for machines, motors and engines; structural components and spare parts therefor for the aforesaid machines, equipment, devices and apparatus