Patent ID: 6991229
Filing Date: 2006-01-31
Classification: B65H

Abstract:
1. A paper stacker for use with an image forming apparatus comprising: paper conveying means for conveying paper with an image recorded thereon in a paper conveyance direction to a stacking position; a top end stopper arranged on an extreme forward position of a conveyance path of the paper in said stacking position for defining a top end position of the paper to be stacked; a paper receiving plate arranged below the paper conveyance path in the stacking position for receiving papers thereon in a state where the papers are alternatively shifted in a direction parallel to the paper conveyance direction; a rear end stopper arranged on a backward position of the paper conveyance path in the stacking position for defining a rear end position of the paper to be stacked; and lifting means for moving up and down said paper receiving plate, wherein said top end stopper and said rear end stopper are movable in association with each other in the same direction, either in the paper conveyance direction or in a direction opposite the paper conveyance direction to create shifted stacks of paper alternating in a direction parallel to the paper conveyance direction.