Illustrated catalogue and price list of John Thomson Press Company's platen presses : for letterpress and color printing, embossing, bookcover stamping and paper-box cutting and scoring (1896)
John Thomson Press Company · New York City : J. Thomson Press Co. · leaf 23
arm of the vibrator frame which acts upon the cam of the crank- wheel, against the fountain cylinder, and which is then rotated by the separate and distinct action of the bell-crank and its pawl, through a space equal to one or more teeth of the ratchet wheel. Thus the ink deposited upon the ductor… … rately timed, relatively, so that the contact of the ductor roller upon the main ink cylinder takes place as the carriage starts on its down motion. The feed may be instantly arrested or started, without stopping the press, by simply swinging the ratchet pawl in or out of engagement. So, too, the…
John Thomson Press Company · Platen presses
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
