Patent ID: 7448624

Claim:
A paper feeding device, comprising: an image forming unit; a paper feeding unit to provide a transfer force to a first side and a second side opposite to the first side of a sheet of paper, the paper feeding unit having a first roller being arranged on a first shaft to face the first side of the paper and a second roller being parallel to the first shaft, the second roller being arranged on a second shaft to face the second side of the paper to press the paper toward the first roller; and a paper-feeding controlling unit to operate the first and second rollers to interrupt the transfer force applied to the paper when a rear end of the paper passes through the first and second rollers, the paper-feeding controlling unit having a controlling portion being rotatably installed on the second shaft to control the transfer force generated by the first roller by making the first and second rollers contact or separate from one another by rotation of the controlling portion and a clutch portion to operate the controlling portion installed on the second shaft by transferring a rotating force to the second shaft when to controlling the transfer force, wherein the controlling portion installed on the second shaft pushes the first shaft when the first and second rollers are separated from one another.