Sheet feeding apparatus and image forming apparatus having the same

Abstract

A sheet feeding apparatus for feeding sheets supported by sheet stacking means capable of ascending and descending by sheet feeding means is provided. The sheet feeding apparatus includes sheet position detection means for detecting that an upper surface of a sheet stack supported by said sheet stacking means reaches a position whereat it can be fed by said sheet feeding means, blowing means for blowing air on an end portion of sheets stacked on said sheet stacking means, and control means for controlling said blowing means, wherein at least, either when it has been detected by said sheet position detection means that the sheets reach a position whereat they can be fed, or before a sheet feeding operation by said sheet feeding means is started, said control means performs a blowing operation by said blowing means during predetermined time.

1 . A sheet feeding apparatus for feeding sheets supported by liftable sheet stacking means, comprising: 
 sheet feeding means for feeding a sheet supported on said sheet stacking means;    sheet position detection means for detecting that an upper surface of a sheet stack supported by said sheet stacking means reaches a feeding position whereat it can be fed by said sheet feeding means;    blowing means for blowing air on an end portion of sheets stacked on said sheet stacking means; and    control means for controlling said blowing means, wherein    at least, either when it has been detected by said sheet position detection means that the upper surface of the sheet stack reach the feeding position, or before a sheet feeding operation by said sheet feeding means is started, said control means performs a blowing operation by said blowing means during a predetermined time.