Patent ID: 8511671

Claim:
A sheet feeding apparatus comprising: a sheet stacking portion which is lifted and lowered with a sheet stacked thereon; a feeding roller which rotates from an initial feeding position following rotation of the feeding shaft in one direction and feeds out the sheet on the sheet stacking portion; a biasing member which applies a force to the sheet stacking portion and pressures the stacked sheet against the feeding roller; a cam member which rotates following rotation of the feeding shaft and lifts and lowers the sheet stacking portion; a predetermined idling section, provided between the feeding roller and the feeding shaft, in which the feeding roller does not work with rotation of the feeding shaft at a predetermined angle; and a returning mechanism which returns the feeding roller to the initial feeding position after the feeding roller finishes feeding the sheet on the sheet stacking portion, wherein when the feeding shaft starts rotating together with the cam member and passes the idling section, the feeding roller starts rotating from initial feeding position, feeds out the sheet on the sheet stacking portion and then is returned to the initial feeding position by the returning mechanism.