A bullet or a cartridge containing a bullet having an elongated body with a forward end and an opposed rear end. A first incline structure is formed on the blocking component for contacting against a button when the blocking component moves in the first direction so that the blocking component moves in a second direction substantially perpendicular to the first direction. As the camshaft rotates, each disc alternatively engages an outer shell so as to rotate the shell in the same direction as the shaft, albeit at a reduced speed. A plurality of images is selected having a direct correspondence with the plurality of words entered into the template. In various examples, such supports may be rigid or semi-rigid, and they may be convex. The operations assembly executes servicing functions on the print head assembly during a non-print period.