Printer that performs shading correction and method for operating the same

Abstract

A printer includes a discharge unit, a first printing unit disposed along a sheet conveying path extending from the discharge unit and configured to print an image on a first sheet while the first sheet is conveyed from the discharge unit to the first printing unit and then to the discharge unit, a second printing unit disposed farther from the discharge unit than the first printing unit along the sheet conveyance path and configured to print an image on a second sheet while the second sheet is conveyed towards the discharge unit therethrough, a scanning unit disposed along the sheet conveying path between the discharge unit and the first printing unit, and configured to scan a surface of the first sheet, and a control unit configured to perform a shading correction of the scanning unit using the second sheet as a white reference.

Dependencies are inferred from the claim text.