Patent ID: 7850170
Filing Date: 2010-12-14
Classification: B65H

Abstract:
1. A stacker device, comprising: a first tray, adapted to stack a paper discharged from a discharge port thereon; a lifter, operable to raise or lower the first tray; an extension tray, rotatably disposed at one end portion of the first tray, and serving as a door cover of the stacker device; a stopper portion of the stacker device, wherein the stacker device is in a closed state when an end portion of the extension tray is fixed to the stopper portion; and a detector, operable to detect a stacked state of the paper and the first tray, wherein when a distance from the discharge port to an uppermost paper of the paper stacked on the first tray is modified due to the paper being discharged onto the first tray, the first tray is raised or lowered based on the stacked state detected by the detector to keep the distance within a predetermined range, wherein the first tray is tilted at a predetermined angle with a horizontal orientation while the first tray is positioned such that paper is to be discharged from the discharge port, and the lifter lowers the first tray to a predetermined position and the first tray has a substantially horizontal orientation when discharging the paper onto the first tray has ended.