A sheet feeding unit according to the invention includes a sheet stacking tray on which the sheet is stacked, a sheet feeding device which feeds the sheet stacked on the sheet stacking tray, and a unit frame which supports the sheet stacking tray and the sheet feeding portion and is attached to a apparatus main body. In the sheet feeding unit, the sheet feeding device is pivotable on the unit frame to change a sheet feeding direction.

 
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> Systems and methods for simplex and duplex image on paper registration

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