Title of Invention: A scratch-off prize-invoice combination printing new patent Patent application number Abstract: A scraping open prize-invoice combination printing new process, including offset printing, inkjet printing, overlay printing, and post-press processing. A digital monitoring device is added between the coding printing and overlay printing to monitor the number printing, which overcomes the disadvantages of low efficiency, high cost, long cycle time, etc., of manual verification of traditional manual numbers, and ensures that invoices cover printing with awards. The confidentiality of the system. Overlay printing uses flexo printing technology to print off oil and silver paste. It has high speed, low consumption, easy drying, clearer patterns, and fuller color.
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