Patent ID: 9296580
Filing Date: 2016-03-29
CPC Classification: B65H,H04N

Claim Text:
1. An ADF (auto document feeder) comprising: a feeder configured to pick up a sheet of paper and carry the sheet of paper to a scanner; a feed controller configured to control the feeder; and a retry controller, wherein if the sheet of paper is not normally picked up by the feeder, the retry controller decreases a speed of a motor driving the feeder and increases a current supplied to the motor for picking up the sheet of paper, wherein the feeder includes a first sensor and the scanner includes a second sensor, and wherein if the sheet of paper is within a paper distance defined from the first sensor indicating whether the sheet of paper is normally picked up to the second sensor indicating a start of image scanning, the retry controller reduces the increased current supplied to the motor to a first original value and increases the decreased speed of the motor to a second original value.