A fast double-sided laser printer

Abstract

A fast double-sided laser printer relates to the technical field of laser printers, comprising a control system, a paper tray, a door cover, a printer body, a lower fixing assembly, an upper fixing assembly, a lower transfer roller, an upper transfer roller, a lower laser, an upper laser, a lower selenium drum, an upper selenium drum, a front paper feed switch and a rear paper feed switch; when the control system receives a document which needs to be printed on both sides, the toner transferred to the front side of the paper is fixed on the paper through the lower selenium drum and the lower fixing assembly after the paper is fed from the paper tray. The paper continues to pass through the upper selenium drum and the upper fixing assembly along a main paper fed passage, the toner transferred to the reverse side of the paper is fixed on the paper, thereby completing double-sided printing; and when the control system receives the document which only needs to be printed on one side, the control system analyzes the remaining amount of the upper and lower selenium drums, and controls the remaining drums and the corresponding imaging transfer fixing system to complete the printing work.The invention realizes the improvement of the double-sided printing speed without affecting the single-sided printing speed.

Description

technical field [0001] The invention relates to a fast double-sided laser printer, which relates to the technical field of laser printers, in particular to a fast double-sided laser printer. Background technique [0002] With the rapid development of science, technology and economy, printers are inseparable from people's daily activities, especially office workers have a greater demand for printers, and as citizens become more and more aware of environmental protection, the demand for double-sided printing is also increasing. getting bigger. There are two main ways to achieve double-sided printing, manual double-sided printing and automatic double-sided printing; manual double-sided printing machines can only print one sheet at a time, and the operator needs to manually flip the paper for printing, which is cumbersome to operate. The practicability is not strong. Automatic double-sided printing means that the printer will roll the paper back to the machine after printing on...

AI Technical Summary

Problems solved by technology

There are two main ways to achieve double-sided printing, manual double-sided printing and automatic double-sided printing; manual double-sided printing machines can only print one sheet at a time, and the operator needs to manually flip the paper for printing, which is cumbersome to operate. The practicability is not strong. Automatic double-sided printing means that the printer will roll the paper back to the machine after printing one side and then continue to print the other side. It is an important criterion to evaluate the quality of a printer

[0003] The application number is CN201720085918.X, a laser printer toner cartridge device capable of double-sided printing, which proposes a kind of two toner cartridges side by side, and the paper passes through the two toner cartridges and prints both sides at the same time, but the toner needs to be removed from the photosensitive drum. Transfer to paper, mainly using the voltage difference between the transfer roller on the back of the paper and the photosensitive drum, the toner can be transferred from the photosensitive drum to the paper, and if the transfer roller rubs against the paper, the unfixed toner It will be scratched, so in practical application, the solution disclosed in this patent cannot be realized

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