Sheet feeding apparatus and image forming apparatus including sheet feeding apparatus

A sheet feeding apparatus comprising:

• a sheet supporting portion configured to support a sheet;
• a lifting unit configured to vertically move the sheet supporting portion;
• an air blowing unit configured to float the sheet by blowing air to the sheet supported on the sheet supporting portion;
• a sheet feeding belt configured to convey the sheet by attracting the sheet which is floated;
• a detection unit configured to detect a position of an uppermost sheet supported on the sheet supporting portion;
• and
• a control unit configured to control the lifting unit,
• wherein
• in a case where a sheet supported on the sheet supporting portion is a double-sided processed sheet with both surfaces coated with a coating agent, the control unit is configured to stop the sheet supporting portion at a position at which a distance between the position of the uppermost sheet detected by the detection unit and the sheet feeding belt corresponds to a first distance, and
• in a case where a sheet supported on the sheet supporting portion is a single-sided processed sheet with a first surface of the sheet coated with the coating agent and a second surface opposite to the first surface not coated with the coating agent, the control unit is configured to stop the sheet supporting portion at a position at which the distance between the position of the uppermost sheet detected by the detection unit and the sheet feeding belt corresponds to a second distance that is shorter than the first distance.