Recording sheet feeding apparatus

A sheet feed apparatus for individually feeding a plurality of sheets to a sheet receiver, said apparatus mounted on a frame and comprising:

• a sheet storage for storing the sheets,
• a delivery roller for conveying the sheets in a feeding direction from the sheet storage to the sheet receiver,
• a feeding roller and a separation roller in contact with each other, whereby the separation roller cooperates with the feeding roller to feed the sheets in the feeding direction and also to separate one of the sheets from the others, whereby the sheets are fed to the sheet receiver singly,
• a rotation resistor connected to the separation roller and rotatable with respect to the frame, and
• a spring member urging the separation roller in an opposite direction to the feeding direction, wherein one end of the spring member is attached to the frame and the other end is attached to the rotation resistor, whereby a bias of the rotation resistor and the spring member is such that power to the separation roller in the feeding direction is enough to overcome the bias when only one sheet is between the feeding roller and the separation roller, thereby permitting the separation roller to rotate in the feeding direction and allow the sheet pass, and the power is not enough to overcome the bias when more than one sheet is between the feeding roller and the separation roller, whereby the separation roller rotates in the opposite direction to prevent more than one sheet from passing.