Ink dam for printing press

Details Ink dam for printing press Ink dam for printing press

1978-06-12

1979-08-28

Fisher, J. Reed

Printing

Multicolor

Inkers

101210, 101363, B41F 3106

Patent

active

041656881

ABSTRACT:
A printing press ink fountain has means for applying different colored inks to different sections of a circumferentially grooved fountain roll for subsequent transfer to an anilox roll, printing cylinder, and moving web. Ink dams or dividers, each having a hole through which the fountain roll extends, divide the ink fountain into separate ink compartments and cooperate with the fountain and anilox rolls to prevent ink transfer between adjacent sections on each roll. Each divider has a circumferential edge around its hole which extends into a fountain roll groove. Each divider also has a grooved edge which rides against the anilox roll. Air ports are provided along these edges and compressed air is expelled therethrough to provide air seals to prevent ink transfer along the rolls. A resilient hollow pneumatically operated tube between the bottom of each divider and the ink fountain provides a mechanical seal between adjacent ink fountain compartments and also biases the grooved edge of the divider against the anilox roll in a tight mechanical seal.

REFERENCES:
patent: 2218945 (1940-10-01), Andersson
patent: 2442700 (1948-06-01), Luehrs
patent: 2744464 (1956-05-01), Harless
patent: 2887050 (1959-05-01), Moser et al.
patent: 3032007 (1962-05-01), McCauliff
patent: 3585932 (1971-06-01), Granger

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