Patent ID: 8651473

Claim:
A feeder comprising: a feed table on which a plurality of papers are staked in one direction, wherein some of the papers are bundled by a staple; a take-out module configured to sequentially take out the stacked papers from an outermost surface of the papers; a first detector configured to detect whether or not the staple exists in the papers within a distance h measured from the outermost surface in the one direction, wherein the distance h is more than 0; and a controller configured to control the take-out module in a first mode or a second mode, wherein when the staple is detected in the papers within the distance h, the controller controls the take-out module in the first mode, in which the take-out module sequentially takes out the stacked papers in a first period, and wherein when the staple is not detected in the papers within the distance h, the controller controls the take-out module in the second mode, in which the take-out module sequentially takes out the stacked papers in a second period that is shorter than the first period.