Patent ID: 7811015

Claim:
A printing apparatus which includes conveyance means for conveying a printing medium, and scanning means for reciprocally moving a printhead in a direction different from a conveyance direction by the conveyance means, and causes the printhead to print on the printing medium, the apparatus comprising: a first conveyance roller, provided in a conveyance path of the conveyance means, for conveying the printing medium; a second conveyance roller, provided in the conveyance path of the conveyance means at a downstream side from said first conveyance roller with respect to the conveyance direction of the printing medium, for conveying the printing medium; a first encoder sensor, provided adjacent to said first conveyance roller, for detecting a conveyance amount by said first conveyance roller; a second encoder sensor, provided adjacent to said second conveyance roller, for detecting a conveyance amount by said second conveyance roller; detection means for detecting a tail end of the printing medium with respect to the conveyance direction of the printing medium; and conveyance control means for controlling conveyance of the printing medium on the basis of output signals from said first encoder sensor and said second encoder sensor in a case where the tail end of the printing medium is located adjacent to said first conveyance roller, wherein said conveyance control means includes: comparison means for comparing a conveyance amount obtained on the basis of the output signal from said first encoder sensor with a conveyance amount obtained on the basis of the output signal from said second encoder sensor; and correction means for correcting conveyance of the printing medium by rotating said second conveyance roller in a reverse direction on the basis of a comparison result from said comparison means.