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Duplex printing device

A double-sided printing and paper technology, applied in printing, typewriter, electrography, etc., can solve the problems of increasing the size of the double-sided printing device, increasing the length of the double-sided printing device, reducing the speed of double-sided printing, etc., and shortening the waiting time for printing time, the total number of rollers is reduced, and the effect of fast printing speed

Inactive Publication Date: 2009-09-09
PRIMAX ELECTRONICS LTD
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AI Technical Summary

Problems solved by technology

The setting of the reverse channel will increase the length of the double-sided printing device and increase the volume of the double-sided printing device, so users need more space to place the double-sided printing device
In addition, due to the longer path of the reverse channel, the second side of the paper takes longer to print, thus reducing the speed of duplex printing

Method used

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Embodiment Construction

[0028] see figure 2, which is a schematic diagram of the internal structure of a preferred embodiment of the duplex printing device of the present invention. The double-sided printing device 200 of the present invention includes a paper input tray 201, a paper output tray 202, a paper pickup roller 206, a paper feed passage 205, a first paper feed roller set 209, a scanning and developing printing unit 203, a printing area 204, an output Paper path 207, second paper feed roller set 210, reverse path 208, paper guide sheet 213, third paper feed roller set 211 and paper output roller set 212, wherein the scanning and developing printing unit 203 includes a laser scanning unit 2031 , photosensitive drum 2032, electric cloth roller 2033, developing roller 2034, carbon powder adding roller 2035, transfer roller 2036 and scraper 2037. The input tray 201 is used to place blank paper, the output tray 202 is used to place printed paper and is located above the input tray 201, and the...

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PUM

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Abstract

The invention relates to a duplex printing device, which comprises a paper feed tray, a paper delivery tray, a paper feed roller, a paper feed channel, a first paper feed roller train, a scanning, displaying and printing unit, a printing area, a paper delivery channel, a second paper feed roller train, a reverse channel, a paper guide plate, a third paper feed roller train and a paper delivery roller train. The duplex printing device is provided with the reverse channel between the printing area and the paper delivery tray to shorten the printing time.

Description

technical field [0001] The invention relates to a printing device, in particular to a printing device capable of double-sided printing. Background technique [0002] In a modern office, a printing device is an indispensable tool. The printing device includes a copier, a printer, a scanner, and a business machine, among which the printer is the most commonly used. General printers only have the function of single-sided printing. When the user needs double-sided printing, the first page of the document in the computer is printed on the first side of the blank paper. After the first page of the document is printed, it must be printed Turn over the image of the first page of the document and put it into the paper tray of the printer, and then print the second page of the document on the second side of the paper. If the number of pages of the document is large, manually turn the paper over and over again. The action of the double-sided printing device brings considerable trouble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/23
CPCB65H2301/33312B41J3/60
Inventor 管建国王钟凯
Owner PRIMAX ELECTRONICS LTD
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