Keyless printing press

Details Keyless printing press Keyless printing press

1989-08-23

1992-03-24

Burr, Edgar S.

Printing

Intaglio

Rotary

101169, B41F 910

Patent

active

050977628

ABSTRACT:
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 is applied thereto. The improvements reside in that a refresh doctor is disposed on the ink source roller at a position downstream of the nip between the ink source roller and the transfer roller for scraping residual ink from the circumferential surface of the ink source roller.

REFERENCES:
patent: 4590855 (1986-05-01), Schommer et al.
patent: 4602564 (1986-07-01), Sakamoto et al.
patent: 4864925 (1989-09-01), Van Kenegan et al.

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