This Instructable shows how to use a small tabletop letterpress. The press is built with little more than plywood, long threaded rods, and a woodworker’s veneer press screw. Unfortunately, the maker didn’t actually take pics of the construction process (the Instructable shows the letter-pressing, not the building of the press itself), but things seem reasonably clear from the included photos.

Build a Letterpress & Use It to Print Things – Link