<P> Two ideas altered the design of the printing press radically: First, the use of steam power for running the machinery, and second the replacement of the printing flatbed with the rotary motion of cylinders . Both elements were for the first time successfully implemented by the German printer Friedrich Koenig in a series of press designs devised between 1802 and 1818 . Having moved to London in 1804, Koenig soon met Thomas Bensley and secured financial support for his project in 1807 . Patented in 1810, Koenig had designed a steam press "much like a hand press connected to a steam engine ." The first production trial of this model occurred in April 1811 . He produced his machine with assistance from German engineer Andreas Friedrich Bauer . </P> <P> Koenig and Bauer sold two of their first models to The Times in London in 1814, capable of 1,100 impressions per hour . The first edition so printed was on 28 November 1814 . They went on to perfect the early model so that it could print on both sides of a sheet at once . This began the long process of making newspapers available to a mass audience (which in turn helped spread literacy), and from the 1820s changed the nature of book production, forcing a greater standardization in titles and other metadata . Their company Koenig & Bauer AG is still one of the world's largest manufacturers of printing presses today . </P> <P> The steam powered rotary printing press, invented in 1843 in the United States by Richard M. Hoe, allowed millions of copies of a page in a single day . Mass production of printed works flourished after the transition to rolled paper, as continuous feed allowed the presses to run at a much faster pace . </P> <P> By the late 1930s or early 1940s, rotary presses had increased substantially in efficiency: a model by Platen Printing Press was capable of performing 2,500 to 3,000 impressions per hour . </P>

Where was the first continuous print press started