Abstract: An ink feeder comprises a plurality of ink tanks for storing inks and wetting water, disposed in a transverse direction of an ink fountain roller, a vane wheel disposed at the bottom of an ink tank, an ink pump for feeding ink, an ink feed blade for adjusting the quantity of ink supplied from the ink pump to the ink fountain roller to a constant value, and a coupling for transmitting the driving force of a single motor to the vane wheel and the ink pump provided to each ink tank. The ink tanks, the ink pump, the ink feed nozzle, the ink feed pipe and the ink feed blade mechanism may be built into one unit, and this unit can be fitted to and removed from the main body of the printing press. The ink feeder may be equipped with an ink scraper comprising scraped ink separators arranged parallel in the axial direction of the scraping doctor support device.

Abstract: A rotary press includes a plurality of printing units, a main shaft for driving all the printing units, a plurality of branch shafts branched from the main shaft, and drive units, each including a clutch and an individual drive motor disposed on the main shaft, for the respective printing units. Each printing unit is provided with an approach switch for detecting a particular position of a plate drum and a plate drum positioning device, in proximity to the particular position, for correcting the position of the plate drum to the particular position. Each drive unit is provided with an electromagnetic brake for stopping rotation of the plate drum in response to the approach switch and a main shaft positioning device on the respective sides of the clutch for correcting a phase deviation of a coupling section of the clutch.

Abstract: A lithographic printing process characterized by demulsifying an emulsion ink by the action of a cooling means and, if desired, a shearing force-giving means provided in a region of ink distributing rollers in an inking system.