Inking unit for printing machines

摘要

Inking unit for a printing machine includes an ink duct, a ductor roller having a surface engageable with ink received in the ink duct, an ink transfer roller for transferring ink from the ductor roller to other rollers, a ductor knife engageable along the length thereof with the surface of the ductor roller and adjustable in position relative to the surface of the ductor roller in zones extending along the length of the ductor knife for controlling the amount of ink to be transferred, and means for adjusting the zones of the ductor knife pulse-like into engagement with and disengagement from the surface of the ductor roller with strokes of equal length and with a stepwise variable stroke time.