Double-side paper feeding device

Abstract

The present invention proposes a double-sided paper feeding device, which can be applied to various scanning devices such as facsimile machines, printers, scanners, and multi-function business machines. The double-sided paper feeding device includes: a paper fetching module, used to guide the paper to be fed into the first paper feeding channel; a paper control roller module, used to provide the first clamping force to feed the paper passing through the scanning module to a The paper input and output module, and the second clamping force make the paper fed in from the paper input and output module enter a second paper feeding channel, and then make the second side of the paper pass the scanning module; the paper input and output module provides a third The clamping force is used to feed out or feed the paper, and the third clamping force is smaller than the first clamping force and the second clamping force. When the second side of the paper needs to be scanned, the input and output rollers rotate in reverse to provide the third clamping force to feed the paper into the second paper feeding channel inside the duplex paper feeding device. The double-sided paper feeding device of the present invention can control the moving accuracy of the paper, 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.

Images