Method for forming plate characters in a half-tone gravure plate

Details Method for forming plate characters in a half-tone gravure plate Method for forming plate characters in a half-tone gravure plate

1990-09-26

1991-06-11

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430300, 101150, 101170, 1014011, G03F 700

Patent

active

050231669

ABSTRACT:
A method for forming plate characters in a half-tone gravure platemaking process being characterized in that a laser beam moved so that the laser beam is intermittently irradiated onto a light sensitive material and a plate character is formed on the light-sensitive material by exposure. The character thus formed is made up with a character frame portion and a character fill portion surrounded by the character frame portion, the character frame portion being formed by a plurality of intermittently arranged groove-form cells each having a predetermined length and a width which can prevent flow of ink when ink is applied by wiping the plate surface with a doctor, and the character fill portion being formed by dot-form cells which have a shadow-portion dot percentage.

REFERENCES:
patent: 3804622 (1974-04-01), Bergin
patent: 3980018 (1976-09-01), Ichikawa

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