Patent ID: 6794633
Filing Date: 2004-09-21
Classification: B65H

Abstract:
A sheet detecting device comprising:a light emitting and receiving unit having a light emitting element for emitting detection light and a light receiving element for receiving the detection light; a reflecting member for reflecting the detection light emitted from said light emitting element and making a reflected light incident to said light receiving element, wherein said light emitting and receiving unit and said reflecting member are disposed with a sheet transport path interposed therebetween, wherein said sheet detecting device is configured to detect a sheet on the basis of interruption of the detection light by the sheet being transported on the sheet transport path; an emission slit which restricts the detection light emitted from said light emitting element; and a reception slit which restricts the detection light incident to said light receiving element, wherein a width of said emission slit along a sheet transport direction is greater than a width of said emission slit along a direction intersecting with the sheet transport direction, and a width of said reception slit along the direction intersecting with the sheet transport direction is greater than a width of said reception slit along the sheet transport direction.