Printing machine capable of reducing blank gap

Abstract

The invention discloses a printing machine capable of reducing a blank gap. The printing machine comprises a printing cylinder and a driving mechanism, wherein a surface of the printing cylinder is coated with an offset printing plate, the offset printing plate enables the printing cylinder to form a printing area and a non-printing area, the driving mechanism comprises a driving gear set, a driven gear set is arranged at an end part of the printing cylinder, the driving gear set comprises a first printing gear and a first non-printing gear, the diameter of the first non-printing gear is greater than that of the first printing gear, the driven gear set comprises a second printing gear and a second non-printing gear, the second printing gear is provided with printing gear teeth meshed withthe first printing gear, the second non-printing gear is provided with non-printing gear teeth meshed with the first non-printing gear, a central angle corresponding to the printing gear teeth is notsmaller than a central angle corresponding to the printing area, and the printing gear teeth and the non-printing gear teeth are sequentially arranged along the circumference. The printing machine hasthe advantage that rotation of the printing roller can be accelerated in a non-printing area.

Description

technical field [0001] The invention belongs to the field of printing machines, and more specifically designs a printing machine for reducing blank gaps. Background technique [0002] With the improvement of printing accuracy requirements for printed matter such as self-adhesive labels, liquid alcohol packaging boxes (such as alcohol), intermittent web printing machines have become an important means of high-precision, low-cost printing and way. Compared with other web printing machines, it has higher printing precision, lower plate-making costs, and more flexible adaptability, and is favored by many printing companies. [0003] In the above-mentioned existing intermittent printing technology, in order to minimize the waste of the blank space caused by the notch of the PS offset printing plate on the paper, the current technical means is that it is necessary to return a little intermittently during the paper feeding process. Rewind to allow compensation for gap blanks. Ap...

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned patent wastes the blank space on the paper, it uses the paper-feeding skipping tractor and the paper-out skipping tractor to accelerate the forward feeding of the paper after printing a pattern to form "intermittent forward skipping traction" , this method is to intermittently increase and decrease the tension on the paper. Some paper cannot withstand this reciprocating intermittent pulling, and is easy to deform or even tear. When the tension is suddenly increased, the paper is easy to jump with the paper feed. The step tractor and the paper skipping tractor slipped, resulting in inaccurate distances and overprinting

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