Printing plate water sensing means and method

Details Printing plate water sensing means and method Printing plate water sensing means and method

1975-07-22

1977-10-11

Coughenour, Clyde I.

Printing

Planographic

Dampeners

101350, 101451, 118 7, 356211, 356212, B41L 2502, B41M 106, G01N 2148

Patent

active

040529371

ABSTRACT:
The amount of water present on a lithographic printing plate during printing is determined by measuring the amount of water present on a surface which is other than that of the printing plate but which carries an amount of water related to the amount of water present on the printing plate. The surface upon which the measurement is made may be the surface of a control pad mounted on the printing roller in the gap between opposite ends of the printing plate, the surface of one of the rollers of the damp train applying water to the printing plate, or the surface of an auxiliary roller contacting one of the rollers of the damp train applying water to the printing plate. The amount of water subsequently applied to the printing plate may be regulated in dependence upon the amount of water determined as being already present on the printing plate.

REFERENCES:
patent: 2278933 (1942-04-01), Kott
patent: 2773412 (1956-12-01), Huck
patent: 3016464 (1962-01-01), Bailey
patent: 3234871 (1966-02-01), Ostwald
patent: 3412677 (1968-11-01), Kantor
patent: 3439175 (1969-04-01), Kammuller et al.

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