Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress (1901)
Boyd, James Penny, 1836-1910 · Philadelphia, A. J. Holman & co · leaf 588
as six plate cylinders, each cylinder carrying eight stereotype plates,and six impression-cylinders. These cylinders, when the press is working atfull speed, make two hundred revolutions a minute. The period of contactbetween the paper and the plate cylinders is therefore inconceivably brief,and… … FOUR ROLLER TWO-REVOLUTION PRESS. A double folder forms part of the machine. A single folder would not beequal to the task imposed on it. As it is, this double folder has to exer-cise such celerity to keep up with the streams of printed paper which de-scend upon it that its operations are too quick…
Progress · Inventions
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
