Automatic pad printing line for printing 4 pieces at a time of single dose shampoo bottles 1 color on one side and 2 colors on the opposite side, complete with vibrator for automatic loading of the pieces, corona device for surface pre-treatment, linear power feeder 44 positions, supports with vacuum hold device, automatic and programmable pads cleaning, adjustable hot air model Hot Wind 300, UV oven positioned at the end of the line for drying the pieces. Output around 4000 pieces/hour.