21. Both methods could be used to prepared curved plates for rotary presses , which were used for the longest print runs. 22. A . S . Abell of the " Baltimore Sun " was the first American user of the rotary press . 23. In 1956, he replaced the paper's flatbed press with a new rotary press that printed 13, 000 32-page sections per hour. 24. This became so popular that, in 1889, Marinoni developed a color rotary press that could print 20, 000 sheets per hour. 25. Hoe constantly made improvements, e . g . by amending his original rotary press specification 175 times before it was superseded. 26. The ensuing casting could be made curved for use on a rotary press or flat for the slower flat bed presses. 27. The rotary press itself is an evolution of the cylinder press, also patented by William Nicholson and invented by Friedrich Koenig. 28. The cylindrical plate used on a rotary press has a seam where ink tends to accumulate, resulting in joint line pairs. 29. The pressroom, with a new press and a rotary press purchased from " The Defiance Crescent News ", was built in 1961. 30. Since the invention of high-speed rotary presses in the last century, a big newspaper or magazine could touch a million or two.
