Patent ID: 8342509
Filing Date: 2013-01-01
Classification: B65H

Abstract:
1. A sheet feeding apparatus, comprising: a sheet stacking portion which rises and lowers while sheets are stacked on the sheet stacking portion; a feed roller which is attached to a feed shaft and rotates from a feed initial position in association with rotation in one direction of the feed shaft to send out each of the sheets stacked on the sheet stacking portion; an urging member which urges the sheet stacking portion to press the stacked sheets toward the feed roller; a cam member which rotates in association with the rotation of the feed shaft to raise and lower the sheet stacking portion; a predetermined idle zone provided between the feed roller and the feed shaft, for preventing the feed roller from being associated with the rotation of the feed shaft; and a return mechanism which returns the feed roller to the feed initial position after the feed roller finishes feeding of each of the sheets on the sheet stacking portion, wherein at a start of sheet feeding operation, the cam member starts to rotate in association with the rotation of the feed shaft and the feed roller starts to rotate from a time when the feed shaft has passed the predetermined idle zone, so as to send out each of the sheets on the sheet stacking portion, and thereafter the feed roller is returned to the feed initial position by the return mechanism.