SHEET SUPPLY DEVICE AND IMAGE FORMING APPARATUS

摘要

The first remaining amount holding unit stores the remaining amount of sheet detected by the remaining amount detection unit before a sheet adding operation to the sheet stacking surface. The second remaining amount holding unit stores the remaining amount of sheet detected by the remaining amount detection unit after the sheet adding operation to the sheet stacking surface. The determination unit determines a sheet adding position based on the respective remaining amount of sheet stored in the first remaining amount holding unit and the second remaining amount holding unit. The feeding speed control unit changes a sheet feeding speed of the pickup roller based on the sheet adding position determined by the determination unit and the sheet remaining amount detected by the remaining amount detection unit.

主权项

1. A sheet supply device for feeding a sheet one by one from a plurality of sheets loaded on a sheet stacking surface, the device comprising:
a pickup roller placed above a sheet stacking surface and for feeding the sheet with touching an upper surface of the sheets loaded on the sheet stacking surface; a remaining amount detection unit for detecting a remaining amount of sheet loaded on the sheet stacking surface; a first remaining amount holding unit for storing the remaining amount of sheet detected by the remaining amount detection unit before an operation for adding the sheets on the sheet stacking surface; a second remaining amount holding unit for storing the remaining amount of sheet detected by the remaining amount detection unit after the operation for adding the sheets on the sheet stacking surface; a determination unit for determining a sheet adding position based on the respective remaining amount of sheet stored in the first remaining amount holding unit and the second remaining amount holding unit; and a feeding speed control unit for changing a sheet feeding speed of the pickup roller based on the sheet adding position determined by the determination unit and the sheet remaining amount detected by the remaining amount detection unit.