Paper conveying device, image forming device, reverse paper damage detection method

Abstract

The invention discloses a paper conveying device, an image forming device and a reversing paper damage detection method. The paper conveying device can be used for reversely moving paper after the paper is jammed and comprises a paper conveying roller, a paper information sensor and a controller, wherein the paper conveying roller can rotate forwards and reversely, the paper information sensor is used for detecting first paper information of the paper in the forward rotation process of the paper conveying roller and detecting second paper information similar to the first paper information of the paper in the reverse rotation process of the paper conveying roller, and the controller is used for stopping the paper conveying roller when the difference value between the first paper information and the second paper information is larger than a preset value. According to the paper conveying device, the image forming device and the reversing paper damage detection method, when paper jam occurs, whether the reversing paper at the paper jam position is damaged can be monitored in real time, and whether to stop the reversion operation at the current paper jam position is determined according to the detection result.

Description

technical field [0001] The invention relates to a paper conveying device in the printing field, in particular to a paper conveying device, an image forming device and a reverse paper damage detection method. Background technique [0002] Aiming at the paper jam phenomenon that often occurs during the use of the image forming device, there is an all position reversal technology in the prior art. In this technology, when a paper jam occurs, all positions are reversed to automatically return the paper to the original position. However, this technique does not take into account whether each position will cause damage to the paper during the reversal process. [0003] Aiming at the disadvantages of all position reversal technologies, a partial position reversal technology appears in the prior art. In this technique, paper jam locations are classified in advance into non-damage jam locations and possible damage jam locations. When a paper jam occurs, the non-damage jamming posi...

AI Technical Summary

Problems solved by technology

However, this technique has another disadvantage, that is, the possible damage jam position does not necessarily cause paper damage every time a paper jam occurs, and when the paper jam occurs, the paper in the possible damage jam position is not damaged, the control The system stops and reverses it across the board, and cannot automatically return the undamaged paper in the current jam position to the original position

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