Printing – Inkers – Roller
Patent
1994-05-03
1996-02-27
Fisher, J. Reed
Printing
Inkers
Roller
101DIG32, 101483, B41F 3106, B41F 3114
Patent
active
054939704
ABSTRACT:
An undershot inking unit and associated method are disclosed. The undershot inking unit includes an ink fountain roller that is controlled independently of the printing speed of the printing machine, and in which the rotational contact angle of the distributor roller on the ink fountain roller is varied according to the printing unit speed. The method comprises controlling the rotational speed of the ink fountain roller independently of the printing speed of the printing machine; and varying the rotational contact angle of the intermittent ductor roller on the ink fountain roller according to the printing speed of the printing machine. In a preferred embodiment, the apparatus includes two coaxial cams rotatably adjustable with respect to each other. Each cam includes a predominant circumferential contour and a subordinate circumferential contour. By adjusting the relative rotational position of the cams, the rotational contact angle of the ductor roller on the ink foundation roller is varied according to the printing unit speed.
REFERENCES:
patent: 3746957 (1973-07-01), Forster et al.
patent: 4007683 (1977-02-01), Dickerson
Blumor Joachim
Gensheimer Valentin
Hinz Marc
Hummel Peter
Stoffler Achim
Fisher J. Reed
MAN Roland Druckmaschinen AG
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