Printing press for modifying hydrophobic and hydrophilic areas o

Details Printing press for modifying hydrophobic and hydrophilic areas o Printing press for modifying hydrophobic and hydrophilic areas o

1987-09-30

1989-05-30

Crowder, Clifford D.

Printing

Planographic

101467, 101478, B41C 110

Patent

active

048339903

ABSTRACT:
For modifying the printing image on a printing image carrier within a printing press the printing image carrier is in the form of a material with ferroelectric properties. Electrodes with or without heat sources are used to delete and write matter on the printing image carrier by polarizing and depolarizing the respective parts of the printing image carrier or the ferroelectric material. The depolarized material is hydrophobic so that it accepts the printing ink whereas the polarized parts are hydrophilic and accept water.

REFERENCES:
patent: 3358081 (1967-12-01), Young
patent: 3406060 (1968-10-01), Schlein
patent: 3530441 (1970-09-01), Ovshinsky
patent: 3550155 (1970-12-01), DeRosa
patent: 3643014 (1972-02-01), Rosenberg
patent: 3651281 (1972-03-01), Becker
patent: 3651488 (1972-03-01), Amodei
patent: 3654864 (1972-04-01), Ovshinsky
patent: 3659936 (1972-05-01), Klose
patent: 3698006 (1972-10-01), Ovshinsky
patent: 3832718 (1974-08-01), Berkowitz
patent: 3951533 (1976-04-01), Bergen

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