Patent ID: 8172219
Filing Date: 2012-05-08
Classification: B65H

Abstract:
1. A sheet feeding device which separates a sheet from a plurality of stacked sheets and feeds the sheet, the sheet feeding device comprising: a sheet stacking portion on which the sheets are stacked; an air blow portion which blows air to the sheets on the sheet stacking portion to blow the sheets upward; a sheet feeding portion which draws and conveys the topmost sheet of the sheets blown upward by the air blow portion; a separation rotating member which is rotatable upon abutting on a rear portion, in a feeding direction, of the sheets stacked on the sheet stacking portion and the separation rotating member rotates in a direction which returns the sheet; a pressing force switching portion which changes a pressing force by the separation rotating member applied onto the sheets stacked on the sheet stacking portion; and a control portion which controls the pressing force switching portion to change the pressing force applied onto the sheets according to a basis weight of sheet to be fed.