Keyless printing press.

摘要

The known keyless printing press including an ink feeder section consisting of an ink source roller, a transfer roller, a doctor roller, an anti-hysteresis doctor disposed on the circumferential surface of the doctor roller and the like, and also provided with a wetting device for a plate drum, is improved in order to realize a fresh condition of the ink source roller which is free from residual ink before printing ink having a uniform moisture content proportion is applied thereto and to thereby improve printing quality. The improvements reside in that a refresh doctor is disposed on the ink source roller at a position behind the contact portion between the ink source roller and the transfer roller for scraping out residual ink on the circumferential surface of the ink source roller.