A sheet stacking device for stacking conveyed sheets includes a stacking surface on which the sheets are stacked; a plurality of projections that project from the stacking surface. Wherein, the projections extend generally in a travel direction of the sheets, which is a direction in which the sheets travel when entering the sheet stacking device, the projections include outer projections and inner projections, the inner projections are located between the inner projections, and a projecting height of the inner projections from the stacking surface is greater than that of the outer projections.

 
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< DEVICE FOR CHANGING A RIBBON IN A MACHINE ASSEMBLY

> METHOD FOR ACCURATELY FINDING A PHYSICAL LOCATION ON AN IMAGE BEARING SURFACE FOR TONER IMAGES FOR OPTIMAL STREAK CORRECTION

> SCANNING OPTICAL APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME

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