Perfecting press

Abstract

The invention discloses a perfecting press. The perfecting press comprises a left color group and a right color group, wherein each color group comprises an upper plate cylinder, a lower plate cylinder, an upper impression cylinder, a lower impression cylinder, an upper blanket cylinder and a lower blanket cylinder, the upper blanket cylinder is arranged between the upper plate cylinder and the upper impression cylinder and is respectively and mutually matched with the upper plate cylinder and the upper impression cylinder; the lower blanket cylinder is arranged between the lower plate cylinder and the lower impression cylinder and is respectively and mutually matched with the lower plate cylinder and the lower impression cylinder, and the upper impression cylinder and the lower impression cylinder are respectively coated with a stainless steel metal plate which is coated with an ink-sticking prevention ceramic coating; and a first paper transferring cylinder and a second paper transferring cylinder which are mutually matched are arranged between the left color group and the right color group, the first paper transferring cylinder is mutually matched with the upper impression cylinder which is arranged on the right color group, and the second paper transferring cylinder is mutually matched with the lower impression cylinder which is arranged on the left color group. According to the perfecting press disclosed by the invention, paper can be printed between the blanket cylinders and the impression cylinders, the impression cylinders are coated with the stainless steel plates, and a printing product has clear dots and good reducibility due to the hard textures of the stainless steel plates.

Description

technical field [0001] The invention relates to a printing machine, in particular to a duplex printing machine. Background technique [0002] The printed matter that needs to be printed on both sides of the paper is usually printed twice. After one side is printed, the paper is turned over and then printed on the other side. Another method is to use a double-sided printing machine, and the paper enters the machine at one time to complete the printing on both sides; figure 1 As shown, a color group of this double-sided printing machine includes two upper and lower plate cylinders 1, two upper and lower impression cylinders 2, the impression cylinder 2 is covered with a blanket 3, and the upper and lower plate cylinders 1 are The graphic ink is transferred to the blanket 3 of the upper and lower two impression cylinders 2 respectively. When the paper 4 passes between the upper and lower two impression cylinders 2, one color printing on the front and back sides is completed at...

AI Technical Summary

Problems solved by technology

This type of machine is efficient, streamlined, and especially good at printed matter such as text and charts. Because it is in the form of "soft pressing and soft", the innate structure determines the dot clarity and reducibility of the printed matter, and the deformability of the paper is insufficient, and it is easy to produce ink. ghosting artifacts

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