Paper processing apparatus, paper processing method and image forming apparatus

Abstract

The invention provides a paper treatment device, a paper treatment method and an image processing system. The paper treatment device includes a transportation electric motor that feeds a piece of paper along the feeding path, a deflexion detection device that detects the deflection of the paper that is being fed, a punch device that is arranged at the downstream of the deflexion detection device, a posture control device that can change the declination angle of the punch device and make skew rectification, a detection device that detects the front end and rear end of the paper that is fed to the punch device, and a control device that controls the transportation electromotor and the feeding speed of the paper. During the period from the detection on the front end of the paper to the detection on the rear end of the paper by the detection device, the feeding speed of the paper is reduced from a first speed to a second speed, the feeding of the paper is stopped when the rear end of the paper has been detected and the punching operation is made on the paper when the paper is stopped.

Description

technical field [0001] The present invention relates to a paper processing device and a paper processing method for performing skew correction and punching processing on paper output from image forming units such as MFPs (Multi Function Peripherals), copiers, and printers. Background technique [0002] In image forming apparatuses such as MFPs, copiers, and printers, in order to perform post-processing such as perforation processing and stapling processing on paper after image formation, a post-processing device (finisher, finisher) is provided adjacent to the paper discharge portion of the image forming apparatus body. ). [0003] In such a post-processing device, the paper ejected from the main body of the image forming apparatus may be skewed with respect to the transport direction (hereinafter referred to as skew), and if the punching process (punching) is performed in the skewed state, the punching position will be shifted. , causing inconvenience when filing. Therefo...

AI Technical Summary

Problems solved by technology

[0009] In addition, due to the increase in the speed of the image forming device, when the conveying speed of the paper is increased, the deceleration timing of the paper will be delayed, or the time from constant speed rotation to stop will not be sufficient, and it will be difficult to stop the paper at the correct position. The problem of the position deviation of the perforation

In addition, there is also a disadvantage that the possibility of detection errors increases when skew detection is performed.

Images