. Appleton's dictionary of machines, mechanics, engine-work, and engineering. he wheel 11 taking into the teeth of thehorizontal rack, and propelling it in either direction by the reversing rack. The rollers may be madeof india-rubber and kevjt cool in a trough of cold water. PRINTING-PRESS. We cannot do better under this head than to exhibit the various pressesmanufactured for this purpose, by R. Hoe & Co., of New York, Type-revolving, fast print ing-machinc.—Fig. 3112. A horizontal cylinder of about four and a half feet indiameter is mounted on a shaft, with appropriate bearings ; about one-
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. he wheel 11 taking into the teeth of thehorizontal rack, and propelling it in either direction by the reversing rack. The rollers may be madeof india-rubber and kevjt cool in a trough of cold water. PRINTING-PRESS. We cannot do better under this head than to exhibit the various pressesmanufactured for this purpose, by R. Hoe & Co., of New York, Type-revolving, fast print ing-machinc.—Fig. 3112. A horizontal cylinder of about four and a half feet indiameter is mounted on a shaft, with appropriate bearings ; about one-fourth of the circumference o( thiscylinder constitutes the bed of the press—the periphery of which portion is adapted to receive die formof types—the remainder is used as a. cylindrical distributing table. The diameter of the cylinder is lessthan that of the form of types, in order that the distributing portion of it may pass the impression cyl-inders without touching. The ink is contained in a fountain placed beneath the large cylinder, from 520 PRINTING-PRESS. 521 which it is taken by a ducter roller and transferred, by a vibrating distributing roller, to the cylindricaldistributing table; the fountain-roller receives a slow and continuous rotary motion, to carry up the inkfrom the fountain. The large cylinder being put in motion, the form of types thereon is, in succession, carried to four ormore corresponding horizontal impression cylinders, arranged at proper distances around it, to give theimpression to four or more sheets, introduced one by each impression cylinder. The fly and feed boardsof two of the impression cylinders are similar to those on the well-known double-cylinder press ; on theother two, the sheet is fed in below and thrown out above. The sheets are from thefeed-board by iron fingers attached to each impression cylinder. Between each two of the impressioncylinders there are two inking-rollers, which vibrate on the dist
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
