Patent ID: 8276905

Claim:
A sheet feeding apparatus comprising: a sheet loading table for loading a stack of sheets; and an adsorption conveyance section comprising: multiple belts which are located above the sheets loaded on the sheet loading table and in which a plurality of through-holes are formed; and an air suction section which is located in an inside of the belts and absorbs air through the through-holes; wherein the adsorption conveyance section sucks air by the air suction section, allows the sheet to be adsorbed to the belt, and conveys it in a conveyance direction; the adsorption conveyance section further comprises: a first roller which is arranged at the inside of the belts and provides driving force to the belts; a second roller which is arranged at the inside of the belts and rotated by the belts, and a third roller which is arranged at the inside of the belts and between the first roller and the second roller in the conveyance direction and rotated by the belts, and the belts are stretched and supported by the first roller, the second roller and the third roller; and an outer surface of the belts mostly protrudes towards the stack of sheets loaded on the sheet loading table at a central part of the third roller in a cross section perpendicular to the conveyance direction containing a shaft of the third roller; wherein an outer diameter of the third roller is formed so that it becomes smaller with distance from the central part of the third roller to outside in an axial direction of the third roller.