Printing press and method of operating same

Details Printing press and method of operating same Printing press and method of operating same

1994-04-14

1995-12-05

Eickholt, Eugene M.

Printing

Planographic

Dampeners

101348, 101349, B41L 2300

Patent

active

054719267

ABSTRACT:
A printing press and a method operating the same. The printing press includes: a frame; a plate cylinder being rotatably mounted on the frame; an inking unit for supplying ink to the plate cylinder. The inking unit comprises: an ink fountain for containing ink; a plurality of inking rollers; means for transferring ink between said ink fountain and said plurality of inking rollers; a plurality of ink applicator rollers for transferring ink between said plurality of inking rollers and said plate cylinder. The printing press further includes a dampening unit for supplying damping medium to said plate cylinder. The dampening unit comprises a form roller having an elastic outer cylindrical surface which can be engaged at the printing plate of a plate cylinder, a driven dampening distributor having a chromium outer cylindrical surface and being assigned to the form roller, and further dampening-unit rollers supplying the form roller with the dampening medium contained in a dampening-medium vessel. The dampening distributor is preferably provided with cups arranged close to each other and preferably featuring each a depth of approximately 20 micrometers, and, preferably, the ridges between the cups: are rounded off; permeate the dampening-medium film and the ink film on the form roller; and, under a certain contact pressure, are in contact with the outer cylindrical surface of the form roller and drive the form roller.

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patent: 4903320 (1991-02-01), Kochsmeier
patent: 4922818 (1990-05-01), Junghans

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