Offset press

Abstract

The invention relates to an offset press, in particular to the technical field of printing equipment. The offset press comprises a rack, a paper transmission device, a paper guiding device, an inkingdevice, an oil ink inductor, a paper compression device, a paper detection device and a paper adsorption device, wherein the inking device comprises an alarm, a rubber roller, a plate roller, an ink supply bucket, an oil ink roller and an ink thickness adjusting mechanism. The ink thickness adjusting mechanism crises a swing plate, wherein one end of the swing plate is hinged to an ink thickness adjusting rod while the other end thereof is fixedly connected to an ink thickness lifting rod; an empty end of the ink thickness adjusting rod is connected to a scraper assembly; the upper end of theink thickness lifting rod is connected to an elastic part, the lower end of the ink thickness lifting rod is hinged to an ink thickness transmission bar and a floating counterweight successively, andthe floating counterweight is located in the ink supply bucket and cans suspend on oil ink of the ink supply bucket. The alarm is mounted on the rack and is electrically connected to the inductor. According to the offset press, the oil ink thickness of the plate roller can be adjusted, so that the printing quality is higher.

Description

technical field [0001] The present application relates to the technical field of printing equipment, in particular to an offset printing machine. Background technique [0002] Offset printing press (offset printing press) is a kind of lithographic printing machine. When printing, the printed image and text are first printed from the plate cylinder to the rubber cylinder, and then transferred to the paper by the rubber cylinder. Offset printing machines can be divided into sheet-fed offset printing machines and web offset printing machines according to different feeding methods; according to the number of printing colors completed in one pass, they can be divided into single-color, two-color, four-color and multi-color printing machines. [0003] The prior art refers to the Chinese invention patent whose authorized notification number is CN1111477C, which discloses a color offset printing machine with a paper feeding mechanism, including a printing plate cylinder, a rubber cy...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned color offset printing machine can supply each sheet of paper from the paper supply roller to the paper feeding mechanism of the impression cylinder in an ideal state, and successfully complete the paper transfer, but the above-mentioned color offset printing machine still has the following disadvantages: due to the amount of ink in the ink supply fountain It will change (increase or decrease) due to re-adding ink or continuous work of the offset printing machine, so the amount of ink delivered to the plate cylinder by the ink roller will also change (increase or decrease), so the ink volume of the plate cylinder The thickness of the ink also changes frequently (thinning or thickening), so that the ink concentration of the graphic on the paper will also often change (too thick or too light), which will have an adverse effect on the printing pattern and reduce the printing quality. , it is necessary to improve

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