Post-processing apparatus for printing medium, image forming apparatus and post-processing method for printing medium

Abstract

The present invention provides an after-treating device of printing medium, an image forming device and an after-treating method of printing medium. In the invention, a displacement treating component which displaces the paper before bookbinding in a continuous bookbinding mode exists. After bookbinding, the printing medium file is immediately discharged from the treating component. In a classifying mode, when the printing medium file is displaced in a direction vertical to the discharging direction, the printing medium file is simultaneously discharged from the treating component. The friction force which is exerted to the printing medium file T in discharging is dispersed to the discharging direction and the direction vertical to the discharging direction.

Description

[0001] Related cross application [0002] This application is based on and claims the benefit of and priority to U.S. Patent Application No. 61 / 016,933, filed December 27, 2007, and U.S. Patent Application No. 61 / 024,530, filed January 29, 2008, the entire contents of which are incorporated Here for reference. technical field [0003] The present invention relates to a printing medium (sheet) post-processing device, an image forming device and a printing medium post-processing method for post-processing a printing medium on which an image is formed in an image forming device of a copier, a printer, or a compound machine. Background technique [0004] There is a printing medium post-processing device that sorts printing media supplied from an image forming apparatus or performs binding processing. As such a printing medium processing device, for example, Japanese Patent Laid-Open No. 2-23150 discloses a device in which, in the stapling mode, after stapling, a shift operation...

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional apparatus, since the printing medium bundle is discharged after the binding process or after the printing medium group placed on the stage is displaced, the discharge start of the printing medium bundle is delayed.

Also, a heavy print media stack with multiple pages requires a displacement mechanism with a large driving torque

In the sorting mode, printing media with a long length in the discharge direction or soft (no tension) printing media may be deflected in the discharge direction during discharge and interfere with discharge.

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