Patent ID: 7355761

Claim:
A driving apparatus for an image scanning or printing machine, comprising: a document supply unit picking up and supplying a sheet of paper in a document supplying direction; a convey unit conveying the sheet supplied by the document supply unit; a document discharge unit externally discharging the sheet; and a driving unit driving the document supply unit, the convey unit, and the document discharge unit, the driving unit comprising, a driving motor rotating in first and second directions, a power transfer part transferring a power of the driving motor to the convey and document discharge units to convey the sheet in a different direction from the document-supplying direction of the document supply unit so that the convey unit and the document discharge unit have functions of arranging a front end of the sheet with respect to the document-supplying direction and conveying the sheet, and discharging the sheet, respectively, wherein the driving motor rotates in the first direction to operate a pickup roller and a supply roller of the document supply unit, and power is transferred from the pickup roller and supply roller to drive a feed roller of the convey unit and a document discharge roller of the document discharge unit in the second direction without physically disengaging driving gears, and a controller controlling the driving motor.