Patent ID: 7460825
Filing Date: 2008-12-02
Classification: G03G

Abstract:
1. A sheet feeding apparatus comprising: a sheet placing tray on which a sheet is placed; a feeding member for feeding the sheet placed on the sheet placing tray; a first sheet detection unit configured to detect whether the sheet is present at a first predetermined detection position on the sheet placing tray; a second sheet detection unit configured to detect whether the sheet is present at a second predetermined detection position on the sheet placing tray, wherein the second predetermined detection position is disposed on an upstream side of the first predetermined detection position in a sheet feeding direction of the feeding member; and a control unit which controls the feeding member so as not to perform the sheet feeding operation when the first detection unit detects that the sheet is present at the first predetermined detection position and the second detection unit detects that the sheet is not present at the second predetermined detection position, wherein the first sheet detection unit has a first flag that is disposed on the first predetermined detection position and is caused to swing by abutment of the sheet placed on the sheet placing tray and a first sensor that detects a swing of the first flag, and wherein the second sheet detection unit has a second flag that is disposed on the second predetermined detection position and is caused to swing by abutment of the sheet placed on the sheet placing tray and a second sensor that detects a swing of the second flag.