G - Physics – 01 – J
Patent
G - Physics
01
J
73/56
G01J 3/46 (2006.01) B41F 33/00 (2006.01) G01J 3/51 (2006.01)
Patent
CA 1047786
AUTOMATIC DENSITOMETER AND METHOD OF COLOR CONTROL IN MULTI-COLOR PRINTING ABSTRACT OF THE DISCLOSURE A novel and improved method of controlling the quality of color fidelity in the printing of multi-colored subject matter is provided by novel and improved automatic densitometer appara- tus adapted to automatically scan the successive differently colored blocks of a color control strip printed along one edge of the printed work piece, to automatically make repeated sensings of color density as the scan proceeds, to automatically change the filters required for sensing the density of different colors as the scan proceeds along the control strip, to automatically activate the apparatus for selecting one sensing of color density as being definitive for each relevant block of the control strip, to automatically print a running record of the definitive color densities sensed from different blocks of the control strip in format juxtaposing the item of the record for each such sensing with the corresponding block of the control strip when the record is placed alongside the control strip, to automatically position such record during scanning in appropriate juxtaposition along- side the control strip so that the densities being recorded can be conveniently checked even during the scanning of a remaining portion of the control strip, and to automatically control the progress of the scanning and the occurrence of the other afore- mentioned functions in response to changes in the color densities being sensed on a continuously iterated basis as the scanning proceeds. The method and apparatus are applicable to multi-color printing involving various numbers or selections of colors.
255545
Brougher Craig R.
Pfahl Kurt A.
Robinson Richard A.
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