Double-side paper feeding device

Abstract

The invention discloses a double face paper advancing device, which is used for various scanning devices such as fax machines, printers, scanners and multi-function printers. The double face paper advancing device comprises a paper taking module which is used for guiding papers to advance into a first paper advancing channel; a paper control scroll module which is used for providing a first clipping force to advance the papers to the outer part of the double face paper advancing device and a second clipping force to advance the papers into the inner part of the double face paper advancing device; a paper in-and-out module which provides a third clipping force to advance into or out the papers. The double face paper advancing device of the invention can control the moving precision of the papers thereby avoiding paper jamming.

Description

technical field [0001] The invention relates to a paper feeding device, in particular to a double-sided paper feeding device. Background technique [0002] In the daily life of modern people and office paperwork, the use of scanning devices is extremely common, and common scanning devices include fax machines, printers, scanners, and Multi Function Peripheral (MFP) devices. In the process of using the above-mentioned scanning device, the user often needs to perform double-sided scanning on the document. Generally, the low-level scanning device requires the user to turn the document over and then scan it again. However, if a large number of documents need to be scanned on both sides, the above method is a waste of human resources and has no efficiency at all. In addition, in order to save the user's home space or office space, the volume of the above-mentioned scanning device should not be too large. [0003] Therefore, an advanced scanning device must not only have the fun...

AI Technical Summary

Problems solved by technology

However, this often results in the paper 10 being Figure 1D When the situation, because the front end of the paper 10 can not enter between the second drive wheel 41 and the second idler wheel 42, there is a paper jam situation.

But if reduce the clamping force between the second driving wheel 41 and the second idler wheel 42, when the paper 10 is in such as Figure 1B In some cases, the movement of the paper 10 cannot be accurately controlled due to insufficient clamping force, resulting in distortion of the scanning results.

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