Platen presses were an improvement upon iron flatbed handpresses because the inking became semi-automated with the addition of soft form rollers. Inking and the paper feed were eventually mechanized with steam or electric power, allowing faster print speeds. Jobbers, as they were also called, were commonly used to produce leaflets, calling cards, and small booklets. Tabletop models became popular for hobbyists. Rotating a flywheel or pulling a lever engages the printing action.