Patent ID: 7859728

Claim:
A two-side scanning apparatus, comprising: a white roller installed on an image sensor; a sheet transfer path extending from both sides of a contacting portion between the white roller and the image sensor; a sheet feeding roller train installed on a first side of the white roller in the sheet transfer path to transfer a sheet to the white roller and comprising two rollers contacting each other; a sheet discharging roller train installed on a second side of the white roller in the sheet transfer path and comprising a sheet discharging roller, and first and second passive rollers installed on and beneath the sheet discharging roller to contact a circumferential surface of the sheet discharging roller; a sheet reversing path surrounding a portion of a circumferential surface of the white roller to receive and guide the sheet being transferred from the sheet discharging roller train back between the white roller and the image sensor; and a sheet guide plate installed in the sheet transfer path between the white roller and the sheet discharging roller train to pivot at a predetermined angle, the sheet guide plate including an upper surface that guides the sheet to a position between the sheet discharging roller and the first passive roller and a lower surface that guides the sheet to a position between the sheet discharging roller and the second passive roller.