. Appleton's dictionary of machines, mechanics, engine-work, and engineering. Improved lithographicpress.—Fig. 3117. This is believed to be the best press in use for lithographicprinting. The side-rods and top beam are made of wrought-iron; the bed and stone are raised to theEcraper by a lever and steel cam, working on a steel friction-roller; the impression is regulated by a. single screw through the top beam; the scraper is hung on a pivot, that it may accommodate itself tcinequalities in the surface of the stone; the bed is made of the toughest ash plated with iron, with iron PROJECTION. 52
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. Improved lithographicpress.—Fig. 3117. This is believed to be the best press in use for lithographicprinting. The side-rods and top beam are made of wrought-iron; the bed and stone are raised to theEcraper by a lever and steel cam, working on a steel friction-roller; the impression is regulated by a. single screw through the top beam; the scraper is hung on a pivot, that it may accommodate itself tcinequalities in the surface of the stone; the bed is made of the toughest ash plated with iron, with iron PROJECTION. 525 runners, which run on friction-rollers; the tympan-frame is wrought-iron, with screws and nuts forstretching the tympan. The larger sizes are geered, so as to enable the printer to take an impressionfrom the largest stone with ease. Copperplate-press.—3118. The side-frames, cylinders, and bed are made of cast-iron; the cylindersare turned and the bed planed perfectly true. The shafts through the cylinders, the braces, arms, andscrews, are of wrought-iron, the bearings of composition.
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
