Patent ID: 7339654
Filing Date: 2008-03-04
Classification: G03B

Abstract:
1. A sheet conveying apparatus comprising: a sheet feed tray on which sheets of a plurality of sizes which differ in length in a sheet widthwise direction perpendicular to a sheet conveying direction; a conveying unit which conveys a sheet on the sheet feed tray to a predetermined processing position; a sheet position detector, which has a plurality of light-emitting units respectively arranged at positions corresponding to different sheet widths perpendicular to the sheet conveying direction and one light-receiving unit capable of moving to positions corresponding to the plurality of light-emitting units, provided between the sheet feed tray and the predetermined processing position; a light reception position detector which detects a position of the light-receiving unit; and a control unit which selects one of the plurality of light-emitting units on the basis of a detection result from the light reception position detector, wherein the sheet position detector causes the selected light-emitting unit to emit light and detects a convey position of an end portion of a sheet in the widthwise direction which is conveyed by the conveying unit on the basis of an output signal from the light-receiving unit when the light-emitting unit is caused to emit light.