1) The Spindle Disc, responsible for moving cans past the Printing Head and the Over Varnish Assembly, ensuring smooth and consistent can positioning.

2) The Printing Head, which applies colored ink onto a printing blanket before the image is transferred onto the can, achieving high-quality print results.

3) The Over Varnish Assembly, which coats the freshly inked surface of the can with a layer of varnish, protecting the print and enhancing the can's overall appearance.