Patent ID: 8500119

Claim:
A sheet conveying device, comprising: a first conveying roller pair for transferring a sheet, a second conveying roller pair for transferring the sheet, said second conveying roller pair being arranged on a downstream side of the first conveying roller pair in a sheet transferring direction at a predetermined distance away therefrom, a substantially linear conveying path for guiding the sheet from the first conveying roller pair to the second conveying roller pair, first and second guide rollers spaced apart from each other in the sheet transferring direction and disposed between the first and second conveyer roller pairs, said first and second guide rollers being located on one side relative to a straight line extending between nip points of the first and second conveying roller pairs, and projecting partly to the other side beyond the straight line so that the first and second guide rollers rotate by the sheet contacting thereto, and an ultrasonic sensing device for sensing overlapping sheets transferred in the conveying path, said ultrasonic sensing device being located between the first and second guide rollers.