Three-mark printing block group for automatic overprint of printing machine

Abstract

The present invention discloses a three marks printing plate group used in printing machine automatically chromatography. Two marks with a certain distance is made in the front of a standard printing plate to form a chromatography blank space; a chromatography mark is made in the middle of the back chromatography blank space which is corresponding to the chromatography blank space of the front standard printing plate to form a group unit. The front standard printing plate is capable of being chosen arbitrarily, so the present invention can inspect in a small interval including a target unit group, which is convenient to match the source color with a single luminous spot photometer head, check without missing color, avoid mistakes with high accuracy and arrange the mark order flexibly with high chromatography precise and so on. So a single standard unit group order taking the first color printing plate or the second color printing plate as the standard and a multicolor printing chromatography are realized.

Description

technical field [0001] The invention relates to a three-mark printing plate set for automatic overprinting of a printing machine. Background technique [0002] At present, rotary encoders are generally installed on combined rotary printing machines. Because the universal color scale of the rear color set and the front color is used, the cumulative error of multiple references is caused. Another example is "Color Mark Rotary Encoder for Printing Automatic Overprinting" (Patent No. 00230667.0). The first printing plate has a synchronous head, which provides conditions for automatic addressing. After the synchronous head, a certain number of overprinting spaces are made. The overprint mark is made in the middle of the corresponding space. In the special case of extremely uneven background color of the printing substrate, it is easy to cause color leakage and false detection. Contents of the invention [0003] The purpose of the present invention is to provide a three-mark pr...

AI Technical Summary

Problems solved by technology

[0002] At present, rotary encoders are generally installed on combined rotary printing machines. Because the general color scale of the rear color and the front color is used, the cumulative error of multiple references is caused.

Another example is "Color Mark Rotary Encoder for Printing Automatic Overprinting" (Patent No. 00230667.0). The first printing plate has a synchronous head, which provides conditions for automatic addressing. After the synchronous head, a certain number of overprinting spaces are made. The overprint mark is made in the middle of the corresponding space. In the special case of extremely uneven background color of the printing substrate, it is easy to cause color leakage and false detection.

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