Combined inking and moistening roller

Details Combined inking and moistening roller Combined inking and moistening roller

1979-05-17

1981-09-08

Coughenour, Clyde I.

Printing

Planographic

Rotary machines

101148, 101350, B41F 736, B41F 3106

Patent

active

042878276

ABSTRACT:
In a lithographic printing apparatus, the rollers that supply ink and/or water to form rollers have a surface with minutely intermixed hydrophilic and oleophilic areas. The amount of water retained by a roller is dependent upon the total of the hydrophilic areas, and the amount of oil-based ink retained by the roller is dependent upon the total of the oleophilic areas. A preselected ratio of oil to water is obtained by selecting the ratio of hydrophilic areas to oleophilic areas.

REFERENCES:
patent: 2016085 (1935-10-01), Fawkes
patent: 2090704 (1937-08-01), Rowell
patent: 2406057 (1946-08-01), Barrett
patent: 2690119 (1954-09-01), Black
patent: 3213787 (1965-10-01), Miller
patent: 3285169 (1966-11-01), Hartwig
patent: 3422759 (1969-01-01), Brynko
patent: 3645202 (1972-02-01), Lake
patent: 3902417 (1975-09-01), Fischer
patent: 4176605 (1979-12-01), Yoshida
patent: 4211167 (1980-07-01), Corse
Deaver; Graphics Arts Monthly; Oct. 1976; pp. 48, 49, 50, 51, 52; Dampening Systems.
Sypula; Xerox Disclosure Journal; vol. 1, No. 8, 8-76; p. 11; Measurement of Fountain Solution.

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