Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1993-06-30
1997-12-09
Evans, F. L.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
356425, 25055905, 25055907, G01N 2117, G01N 2130, G01B 1128
Patent
active
056965885
ABSTRACT:
A lithographic plate scanner provides more accurate representations of the color intensity of the various image areas of a plate having a fixed image by using only a single photocell to read the solid color bar, the white color bar and the successive image areas in a column of the plate. The readings are stored and a computer compares the image area readings with respect to the color bar readings and determines the amount of ink that must be flowed when the plate is mounted in a printing press to replicate the color in the printing, and stores the same on a floppy disk which is mounted in the printing press computer when the printing occurs.
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Evans F. L.
Taphorn Joseph B.
Williams Alexander Oscor
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