Offset printing machine inking system with selectively engageabl

Details Offset printing machine inking system with selectively engageabl Offset printing machine inking system with selectively engageabl

1982-02-03

1983-06-14

Fisher, J. Reed

Printing

Inkers

Roller

101352, B41F 3130

Patent

active

043876471

ABSTRACT:
To provide, selectively, a high degree of ink and damping liquid to substrates of high absorbency, such as newsprint or a smaller amount of ink and little or no damping liquid when printing on calendared paper metal foil or other non-absorbent surfaces, the ink roller train, applying ink to a forme roller (2) in engagement with the plate cylinder, has a second or additional ink roller train in parallel thereto having an ink input roller (8a, 12), selectively, in engagement or out of engagement with an ink transfer roller (5, 6, 7) of the first ink roller train, and an ink output roller (8e, 13) in engagement with the forme roller. The additional ink roller train is a unit having a plurality of mutually surface engaged rollers, driven merely by their surface engagement or roller elements such as centerless floating cylinders or balls within a cage. For substrates of high absorbency, both the normal ink roller train as well as the additional ink roller train are connected, in parallel to provide a maximum of ink to the forme roller and hence to the plate cylinder; for printing of non-absorbent surfaces, the input rollers (8a, 12) of the additional ink transfer roller train unit are lifted off engagement from the normal ink transfer rollers, so that the roller elements of the additional ink transfer roller train are merely carried along by engagement of the output roller with the forme roller, and provide a large surface for evaporation of damping liquid applied thereto to effectively remove damping liquid from the forme roller and hence from the plate cylinder.

REFERENCES:
patent: 3150589 (1964-09-01), Senogles

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