Patent ID: 9567177
Date: 2017-02-14
CPC Classifications: B65H

Claim:
1. A paper discharge device that discharges and stacks paper sheets on which images are formed according to image data, the paper discharge device comprising: a discharge roller that discharges the paper sheets; a discharge angle adjustment unit that adjusts a discharge angle of the discharge roller; and a control unit that is configured to identify a paper sheet to be discharged on which an image is formed facing downward, divide an image region of image data on the identified paper sheet into areas along a discharge direction, determine an area in which a maximum image density related to the formed image for each divided area is higher than or equal to a specified threshold, and control the discharge angle adjustment unit so that the discharge angle of the discharge roller becomes a specific discharge angle such that the determined area is prevented from coming into contact with an already stacked paper sheet until the identified paper sheet to be discharged has been discharged from the discharge roller.