Patent ID: 8561977
Filing Date: 2013-10-22
Classification: B65H

Abstract:
1. A post-processing apparatus with a sheet ejection device for an office machine, said post-processing apparatus comprising: a first sheet tray for storing plural paper sheets, wherein said first sheet tray comprises an elongated groove, and said elongated groove is extended from a first end of said first sheet tray to a second end of said first sheet tray; a second sheet tray located beside and below said second end of said first sheet tray; and said sheet ejection device for transmitting said plural paper sheets from said first sheet tray to said second sheet tray, wherein said sheet ejection device comprising: a ring-shaped conveyor belt disposed under said elongated groove of said first sheet tray; a driving device for driving a circular movement of said ring-shaped conveyor belt; and a sheet ejection arm movable with said ring-shaped conveyor belt, so that movement of said ring-shaped conveyor belt causes said sheet ejection arm to move through said elongated groove from said first end of said first sheet tray to said second end of said first sheet tray, wherein said sheet ejection arm comprises a first pushing element and a second pushing element, said first pushing element is protruded from a surface of said ring-shaped conveyor belt, and said second pushing element is pivotally coupled to said first pushing element and pivots relative to said first pushing element under gravity influence, wherein after said sheet ejection arm is moved through said elongated groove from said first end of said first sheet tray, tail edges of said plural paper sheets are pushed by said first and second pushing elements of said sheet ejection arm, so that said plural paper sheets are moved toward said second end of said first sheet tray, wherein when said tail edges of said plural paper sheets reach said second end of said first sheet tray, said second pushing element pivots relative to said first pushing member under gravity influence toward said second sheet tray to press said tail edges of said plural paper sheets, so that said plural paper sheets are aligned with each other and smoothly fall down to said second sheet tray.