Image recording apparatus

摘要

A passage switching section of an image recording apparatus is provided with a main outlet formed for discharging a normal-sized recording-paper sheet carried along a main passage. A sub-outlet is formed above the main outlet. A sub-passage diverges from the main passage toward the sub-outlet. A passage switching mechanism for changing the sheet passage is disposed at a bifurcation of the passages. A density measuring sensor is disposed at the sub-passage. On the basis of varied sheet information including sheet-size information, a calibration sheet for calibrating recording density of an exposing section is discharged from the sub-outlet. At this time, density of a calibration pattern of the calibration sheet is measured. It is possible to calibrate the recording density of the image recording apparatus in an unmanned state.