SHEET FEEDING DEVICE AND CONTROL METHOD THEREFOR
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United States of America Patent
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Issued Date -
Jan 28, 2021
app pub date -
Jul 16, 2020
filing date -
Jul 22, 2019
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Abstract
Sheets are set on the top face of a lift plate. A lift mechanism makes a lift plate ascend and descend. A sheet feeding roller and a distance sensor are provided over the lift plate. The distance sensor measures a distance (measured distance) to a measurement target placed below. Based on the measured distance before the lift plate is raised, the controller calculates a remaining quantity value indicating a remaining quantity of sheets. When, after the lift plate starts to rise, the recognized measured distance becomes equal to or smaller than the upper limit distance, the controller makes the lift mechanism stop raising the lift plate.
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