🖨️ Wooden Screw Press: Bar Pull, Thread Friction, Platen Pressure and Self-Locking (2D)

Front view of a wooden hand press as used for printing: a pull on the bar turns a square-thread screw that lowers the platen onto the form and paper. Set the pull, bar length, screw lead and radius, thread friction, platen area and frame stiffness and read the platen load, impression pressure, efficiency and whether the screw locks or overhauls. Four numerical checks run in the page.