How A Printing Press Works
A printing press, in its classical form, is a standing mechanism, ranging from 5 to 7 feet long, 3 feet wide, and 7 feet tall. Type arranged into pages is placed in a frame to make a forme, which itself is placed onto a flat stone or 'bed'. The type is inked, and the paper is held between a frisket and tympan (two frames covered with paper or parchment). These are folded down, so that the paper lies on the surface of the inked type. The bed is rolled under the platen, using a windlass mechanism, and the impression is made with a screw that transmits pressure through the platen. Then the screw is reversed, the windlass turned again to move the bed back to its original position, the tympan and frisket raised and opened, and the printed sheet removed. Such presses were always worked by hand. After around 1800, iron presses were developed, some of which could be operated by steam power.
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Famous quotes containing the words printing, press and/or works:
“The printing press was at first mistaken for an engine of immortality by everybody except Shakespeare.”
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And lo! the Press was found at last!”
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“Science is feasible when the variables are few and can be enumerated; when their combinations are distinct and clear. We are tending toward the condition of science and aspiring to do it. The artist works out his own formulas; the interest of science lies in the art of making science.”
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