Patent ID: 6296247
Filing Date: 2001-10-02
Classification: B65H,G03G

Abstract:
A sheet stacking apparatus comprising:a sheet discharge tray configured to move up and down and hold a sheet that is discharged thereto; anda sheet discharge roller located above said sheet discharge tray and rotatable to discharge the sheet to said sheet discharge tray, whereinsaid sheet discharge tray receives the sheet from said sheet discharge roller at a standard sheet receiving position which is located at a predetermined downward distance away from said sheet discharge roller, andsaid sheet discharge tray moves down to a lower position than said standard sheet receiving position by a predetermined distance and receives at least a next sheet at said lower position, when a stacked amount of sheets on said sheet discharge tray reaches a predetermined stacking amount;a plurality of sensors configured to identify a top of the stacked amount of sheets; anda lever configured to cooperate with said plurality of sensors to control a movement of said sheet discharge tray by moving said lever to a sensing position of at least one of said plurality of sensors corresponding to an operating mode of said apparatus.