Method for forming plate characters in a half-tone gravure platemaking process
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United States of America Patent
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-
Nov 17, 1992
Grant Date -
N/A
app pub date -
Sep 26, 1990
filing date -
Sep 27, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for forming plate characters in a half-tone gravure platemaking process wherein the laser beam is moved so that it will be irradiated on a light sensitive material for forming a plate character on the light-sensitive material by exposure. The plate character is made with a frame portion and a filling portion. The frame portion is formed with continuous groove-form cells which have a predetermined length and width and dot-form projections are formed in the groove-form cells for preventing ink flow. The filling portion is formed by dot-form cells which have a shadow-portion dot percentage.
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